The present application provides a novel thermal protection transient voltage suppressor, comprising: a housing, and a mounting frame, a TVS component, springs, a sliding block, and a reed which are arranged in the housing; the reed is connected to the TVS component; the sliding block is slidably arranged on the mounting frame; protruding spring rods are arranged on the sliding block and the mounting frame; two ends of each spring are respectively connected to the corresponding spring rod of the sliding block and the corresponding spring rod of the mounting frame; the sliding block abuts against the reed under the tension effect of the springs; limiting bosses are arranged on the inner wall of the housing; the limiting bosses and the side wall of the housing define limiting channels; the spring rods of the mounting frame extend into the limiting channels; and the limiting bosses abut against the springs to limit the springs from disengaging from the spring rods of the mounting frame. The spring rods of the mounting frame are effectively prevented from being softened in the reflow soldering process and causing the springs to be separated, thereby ensuring the performance of the product.
H02H 3/02 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details
2.
THERMAL-PROTECTIVE TRANSIENT VOLTAGE SUPPRESSOR (TVS)
A thermal-protective transient voltage suppressor (TVS) includes a TVS assembly, a housing, a frame, a cover plate, and a pin, where the TVS assembly is provided in the frame; the TVS assembly is electrically connected to the pin; the housing and the cover plate form an accommodation chamber for accommodating the frame; the pin extends out of the accommodation chamber, and an extended part of the pin is provided with a mounting portion for surface mount soldering; a spacing limit post is provided on the cover plate; and the frame abuts against the spacing limit post, such that the mounting portion of the pin and the TVS assembly are spaced apart by a preset distance. The spacing limit post on the cover plate of the thermal-protective TVS limits the frame provided with the TVS assembly, thereby increasing a distance between the mounting portion of the pin and the TVS assembly.
The present disclosure relates to the technical field of varistors, in particular to a direct-current low-residual-voltage varistor and a preparation method therefor. The components of a formula for the varistor comprise auxiliary materials and ZnO that serves as a main component, wherein the auxiliary materials comprise a solution containing Al3+, a solution containing Ag+, a solution containing B3+, and at least one compound containing a metal element which is selected from any one or more of Bi, Sb, Co, Mn, Cr, Ni, Ba or Ca. By adding the element Ag, unstable ion migration in a grain boundary can be effectively inhibited, such that the aging resistance and discharge current capacity of an anti-direct-current load thereof are improved; and by adding the elements B, Ba and Ca, a glass phase can be formed together with bismuth oxide, thereby effectively improving the compactness of the crystal boundary of the varistor and ameliorating the phenomenon of an increased initial leakage current due to the addition of Al ions thereto, such that the direct current aging characteristic of the formula is more stable.
C04B 35/453 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zinc, tin or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
A thermally protected varistor includes a frame, a varistor, a slider, an elastic member, and a reed electrode. The slider is provided between the reed electrode and the varistor. The reed electrode is welded to an electrode of the varistor through a low-melting-point alloy. The elastic member is connected to the slider to drive the slider to abut against a connection position between the reed electrode and the varistor. A wrapper made of a heat-resisting material is provided outside the slider. In the thermally protected varistor, the slider connected to the elastic member is provided between the varistor and the reed electrode to achieve automatic disconnection in case of overvoltage, thereby effectively protecting electrical equipment. The wrapper made of the heat-resisting material is provided on the slider, so as to prevent the slider from melting and catching fire due to a high current passing through.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
5.
SURGE PROTECTION DEVICE (SPD) WITH DOUBLE-TRIP MECHANISM
A surge protection device (SPD) with a double-trip mechanism includes two trip structures on a frame, where the two trip structures are respectively a first trip structure and a second trip structure; the first trip structure includes a slider and a first tension spring; the first tension spring includes one end connected to the frame, and the other end connected to the slider; the second trip structure includes a second tension spring; the second tension spring includes one end connected to the frame, and the other end connected to the reed; and when the SPD is triggered, the first tension spring drives the slider to move to the electrode and be located between the electrode and the reed, and the second tension spring drives the reed to move toward a direction away from the electrode.
Provided in the present disclosure is a multi-gap lightning arrester having pilot trigger electrodes, comprising N+1 plate-shaped electrodes which are insulated and arranged in a stacked mode; the N+1 plate-shaped electrodes forming N discharge gaps; and one electrode surface or two electrode surfaces of each of said plate-shaped electrodes being provided with a protrusion, namely a pilot trigger electrode. The discharge gaps are formed by combining an electrode surface having a pilot trigger electrode of a plate-shaped electrode with a planar electrode surface of another plate-shaped electrode or an electrode surface having a pilot trigger electrode of another plate-shaped electrode. The multi-gap lightning arrester of the present disclosure solves the problems that existing air gap lightning arresters have uneven triggering ignition, limited current conduction capacity, and poor turn-off capability when follow current is larger.
A modular surge protection device (SPD) is provided. The modular SPD includes an overvoltage protection component, and a trip mechanism for disconnecting the SPD, where the overvoltage protection component is provided with a pin electrode; the overvoltage protection component includes a voltage switching element; and the trip mechanism is provided on the voltage switching element. The SPD can ensure no action of the trip mechanism in response to a surge in a high-temperature environment, and does not affect the action time of the trip mechanism in response to an abnormal overcurrent.
H02H 3/20 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
8.
HIGH-CURRENT HIGH-VOLTAGE TEMPERATURE FUSE CAPABLE OF BEING QUICKLY FUSED
The present disclosure relates to the technical field of temperature fuses, and in particular to a high-current high-voltage temperature fuse capable of being quickly fused. On the basis of a traditional temperature fuse, an elastic member and an insulating spacer sleeve are additionally arranged and are connected to cooperate with each other, and when an electric connector is triggered, the elastic member drives the insulating spacer sleeve to be located between a first conducting wire and a second conducting wire. That is, the electric connector between the two conducting wires is quickly pushed open under the thrust of the elastic member, so that the conduction between the two conducting wires is quickly cut off. Due to the physical separation of the insulating spacer sleeve, an electrical gap between the two conducting wires is effectively improved, so that a product of a small size can still achieve a relatively high rated voltage, and the current and high voltage safety fusing capability of the product is greatly improved.
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
The present disclosure relates to a thermally protected varistor, comprising a frame, a varistor, a sliding block, elastic pieces and a reed electrode, wherein the sliding block is arranged between the reed electrode and the varistor; the reed electrode is welded to an electrode of the varistor by means of a low-melting-point alloy; the elastic pieces are connected to the sliding block, and thus drive the sliding block to abut against a joint between the reed electrode and the varistor; and a wrapping layer made of a high-temperature-resistant material is disposed outside the sliding block. In the technical solution of the present disclosure, a sliding block connected to elastic pieces is arranged between a varistor and a reed electrode, so as to realize the function of automatic disconnection during overvoltage, thereby effectively protecting an electric device. A wrapping layer made of a high-temperature-resistant material is disposed on the sliding block, so as to prevent melt penetration and the outbreak of a fire from occurring due to the sliding block being heated when a large current passes, thereby effectively protecting the safety of devices and people.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
10.
BOX CORE MODULE, PLUG MODULE, AND SURGE PROTECTIVE DEVICE (SPD)
A box core module, a plug module, and a surge protective device (SPD) are provided. The plug module includes a housing, bottom plates, a plurality of box core modules with an independent tripping mechanism, a first pin electrode, and a second pin electrode. The plurality of box core modules are vertically arranged on a side of the bottom plates in a side-by-side or opposite manner, and the plurality of box core modules are connected by an internal connection electrode to form a series and/or parallel combined line. The combined line is led out through the first pin electrode and the second pin electrode. The plug module is combined with a base. A modularized multi-form assembly-type SPD is provided. Mutual conversion between a high working voltage of the SPD and a large lightning strike through-current is achieved when the same voltage-limiting element is used and an overall tripping mode remains unchanged.
H01H 71/04 - Means for indicating condition of the switching device
H01H 83/10 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H01H 71/12 - Automatic release mechanisms with or without manual release
A surge protector with an anti-off structure includes a pluggable module and a base. The base includes external terminal connection parts on both sides. The top of the external terminal connection part of the base is provided with a sliding limit device. Both sides of the pluggable module are provided with limit protruding blocks. The sliding limit device includes a hole cover, and the hole cover is slidably connected to the top of the external terminal connection part. When the pluggable module is completely inserted, a part of the hole cover protrudes into the pluggable module installation slot and is clamped with a fixing limit device of the pluggable module to limit the pluggable module from being detached from the base. When the pluggable module is removed, the hole cover is moved toward both sides, such that the hole cover is separated from the fixing limit device.
The disclosure relates to a transient voltage suppressor having heat protection, comprising a TVS assembly, a housing, a frame, a cover plate and a pin; the TVS assembly is arranged in the frame, and the TVS assembly is electrically connected with the pin; the housing and the cover plate form an accommodating cavity to accommodate the frame, and the pin protrudes out of the accommodating cavity, and the protruding portion is provided with a mounting portion used for surface mounting and welding; the cover plate is provided with a separating, spacing column, the frame abuts against the separating, spacing column, separating the mounting portion of the pin from the TVS assembly by a preset distance. According to the scheme, a separating, spacing column is provided at the position of the cover plate of the transient voltage suppressor having heat protection, spacing the frame on which the TVS assembly is mounted, thereby increasing the distance between the mounting portion of the pin and the TVS assembly. Due to the fact that the gas thermal conductivity of the separated parts is low, when the space for a device is compact, the structure prevents the heat from the pin mounting portion being transmitted out, preventing the problem of the SMT welds not connecting or poor soldering. The quality and reliability of the product are effectively improved.
H01L 23/10 - ContainersSeals characterised by the material or arrangement of seals between parts, e.g. between cap and base of the container or between leads and walls of the container
H01L 23/488 - Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads or terminal arrangements consisting of soldered or bonded constructions
H01L 27/08 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind
Provided in the present disclosure is a thermal protection type transient voltage suppressor, comprising a housing, a cover plate, a TVS assembly, and a pin electrode. The housing and the cover plate are buckled to form an accommodating cavity, and the TVS assembly and the pin electrode are accommodated in the accommodating cavity. The TVS assembly comprises an inner frame and a TVS chip accommodated in the inner frame. The pin electrode extends from the accommodating cavity and is provided with a surface mounting region on an extending portion for surface mounting and welding. The beneficial effects of the present disclosure are that the starting speed of thermal protection is increased, and a surface mounting and welding mode is provided; and the thermal resistance design of a housing and a pin enables a low-temperature welding joint not to be affected by a reflow welding high-temperature region.
H01L 23/04 - ContainersSeals characterised by the shape
H01L 23/10 - ContainersSeals characterised by the material or arrangement of seals between parts, e.g. between cap and base of the container or between leads and walls of the container
H01L 27/02 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
H01L 23/49 - Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads or terminal arrangements consisting of soldered or bonded constructions wire-like
The present application relates to the field of protectors, and in particular to a thermal fuse. A traditional mode in which a push rod comes into direct contact with a temperature-sensitive body to achieve transmission is changed, and indirect transmission of the push rod and the temperature-sensitive body is achieved by additionally arranging a spring mechanism between the two, which is specifically: the spring mechanism comprising a spring and a spring column, wherein the spring is sleeved on one end of the spring column; when the thermal fuse is not triggered, the spring is in a compressed state, the temperature-sensitive body abuts against the other end of the spring column, one end of the push rod abuts against a reed, the other end of the push rod abuts against the end of one side wall of the spring column, and the length of the temperature-sensitive body in a spring extension and retraction direction is greater than or equal to the length of the push rod abutting against the spring column in the spring extension and retraction direction; and when the temperature-sensitive body is triggered, the compression elastic force of the spring is released, such that the other end of the push rod is separated from the spring column, and therefore the reed is separated from a contact under the elastic force of the reed, so as to cut off a circuit. By means of the above structure, the problem of poor electrode contact caused by the aging of a temperature-sensitive body is overcome.
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
H01H 85/02 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive Details
A plug-in surge protector, comprising a housing (1), a surge protection module (2) and a crank member (3), wherein the surge protection module (2) is arranged in the housing (1), and the housing (1) is provided with a snap-fit hole (11); the crank member (3) is rotatably arranged at the housing (1) by means of a rotating shaft (33), and the crank member (3) is provided with a pressing portion (32) and a protruding snap-fit portion (31); the snap-fit portion (31) protrudes from the inside of the snap-fit hole (11), so that the housing (1) is snap-fitted at a preset position; and after being pressed, the pressing portion (32) drives the snap-fit portion (31) to retract into the housing (1) from the snap-fit hole (11), so that the housing (1) is unlocked. The surge protector is provided with the snap-fit hole (11) and the crank member (3), such that after the protector is plugged into an apparatus, the housing (1) is snap-fitted into the apparatus by means of the snap-fit portion (31) so as to prevent the apparatus from loosening and falling off; and when the protector is to be pulled out, the pressing portion (32) is pressed to drive the snap-fit portion (31) to retract into the housing (1) from the snap-fit hole (11), such that the protector is unlocked completely, which is easy and convenient.
A surge protection device with a high breaking capacity includes a housing with at least two lead-out electrodes, and a voltage limiting device and a thermal tripping mechanism that are installed in the housing. The voltage limiting device includes a voltage limiter, a first electrode and a second electrode that are positioned and installed in an insulating cover. The thermal tripping mechanism includes a fixed assembly, a movable assembly and a thermal trigger device. The fixed assembly and the movable assembly form a plurality of displacement switches arranged in series. The thermal trigger device is disposed in linkage with the movable assembly and includes a metal trigger sheet, a fusible alloy and an energy storage member. One end of the metal trigger sheet is fixed on the movable assembly, and the other end of the metal trigger sheet is fixed on the second electrode through welding by the fusible alloy.
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
A surge protector with dual tripping mechanisms, comprising two tripping structures respectively arranged on a frame (1). The two tripping structures are respectively a first tripping structure and a second tripping structure. The first tripping structure comprises a sliding block (7) and a first tension spring (2). One end of the first tension spring (2) is connected to the frame (1), and the other end of the first tension spring (2) is connected to the sliding block (7). The second tripping structure comprises a second tension spring (8). One end of the second tension spring (8) is connected to the frame (1), and the other end of the second tension spring (8) is connected to a reed (3). When the surge protector is triggered, the first tension spring (2) drives a slider (7) to move to an electrode (10) and is located between the electrode (10) and the reed (3), and the second tension spring (8) drives the reed (3) to move in the direction away from the electrode (10). The two tripping structures are independent of each other. When the first tripping structure fails, the second tripping structure can still work normally, such that the tripping of the surge protector is normal, and the occurrence probability of the tripping abnormality is reduced.
09 - Scientific and electric apparatus and instruments
Goods & Services
Electric control devices for heat management; Electric discharge tubes, other than for lighting; Electric sensors; Electrical transformers; Electronic integrated circuits; Fuse wire; Resistances, electric; Semiconductor devices; Temperature sensors; Voltage surge protectors
The disclosure discloses a graphite surge protector, comprising a tripping device, a graphite gap module, a first indicator sheet, a second indicator sheet, an indicator frame, a power arm, and a bearing, wherein the first indicator sheet is disposed on the indicator frame, the indicator frame is sleeved on the bearing, the bearing is fixedly connected to one end of the power arm, the other end of the power arm is fixedly connected to the tripping device, and the tripping device is disposed on a lead end of the graphite gap module. When the tripping device trips, the power arm is pushed to rotate around the bearing. When surge comes, the tripping device trips, so that the power arm rotates around the bearing and drives same to rotate under the thrust of the tripping device. The bearing drives the indicator frame to rotate, such that the first indicator sheet is displaced so as not to overlap the second indicator sheet.
The present disclosure relates to the technical field of electronic and electrical devices, in particular to a modular surge protection device. The modular surge protection device comprises an overvoltage protection assembly and a tripping mechanism for disconnecting the surge protection device, the overvoltage protection assembly being provided with a pin electrode, the overvoltage protection assembly comprising a voltage switch-type element, and the tripping mechanism being provided on the voltage switch-type element. By means of a surge protection device having the structure of the present disclosure, the tripping mechanism does not act when a surge occurs in a high-temperature environment, without affecting the action time of the tripping mechanism when an anomalous overcurrent occurs.
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
A surge protector, comprising a first discharge tube, a second discharge tube, a first trip device, and a second trip device; one lead end of the first discharge tube and one lead end of the second discharge tube are electrically connected to the first trip device, and the other lead end of the second discharge tube is electrically connected to the second trip device; the other lead end of the first discharge tube is used for externally connecting to a phase line, the first trip device is used for externally connecting to a neutral line, and the second trip device is used for externally connecting to a protection line; the first discharge tube, the second discharge tube, the first trip device and the second trip device form a three-electrode surge protector externally connected to the neutral line, the protection line and the phase line; the first trip device may prevent surges from the phase line or the neutral line; and the second trip device may prevent surges from the phase line or the protection line. Overall, single-phase protection is achieved, and a circuit is promptly tripped when a surge occurs so that other devices are protected.
H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
22.
SILICONE RUBBER AND PREPARATION METHOD THEREFOR, AND PIEZORESISTOR AND PREPARATION METHOD THEREFOR
The present disclosure relates to the technical field of materials, and specifically relates to a silicone rubber and a preparation method therefor, and a piezoresistor and a preparation method therefor. The silicone rubber is prepared from the following raw materials: a B-type hydroxyl-containing vinyl silicone oil, an A-type hydroxyl-containing vinyl silicone oil, a catalyst, white carbon black, a halogen-free environmentally-friendly flame retardant, aluminum hydroxide, low-hydrogen silicone oil and an inhibitor, such that the obtained silicone rubber not only has good high-temperature and high-humidity resistance performance, but also has excellent tear resistance.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
H01C 17/02 - Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
The present disclosure relates to the technical field of varistors, and in particular to a varistor encapsulation molding method, which comprises the following steps: S1, placing a varistor component into a bottom die of a forming mold; S2: injecting silicone rubber into the forming mold, and performing a mold closing operation after injection; S3: performing a heat-curing operation on the closed forming mold; and S4: opening the mold after heat-curing, so as to obtain an encapsulation-molded varistor. By means of performing injection molding using silicone rubber, the external dimensions of a varistor are managed and controlled by a forming mold; and the external dimensions are stable, and the tolerance thereof can be controlled within ±0.1 mm. In addition, by means of using a silicone rubber injection molding process, a welding electrode surface of a varistor component does not need to be protected prior to encapsulation.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
H01C 17/02 - Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
C08L 83/07 - Polysiloxanes containing silicon bound to unsaturated aliphatic groups
C08L 83/05 - Polysiloxanes containing silicon bound to hydrogen
09 - Scientific and electric apparatus and instruments
Goods & Services
Electronic integrated circuits; Resistances, electric; Fuse wire; Electrical fuses; Semiconductor devices; Electrical transformers; Voltage surge protectors; Temperature sensors; Thermal sensing device for use in electronics and circuit protection devices; Battery chargers; all not for use in medical or healthcare devices
A surge protector with an anti-falling structure, relating to the technical field of surge protectors, and comprising a plug-in module (2) and a base (1), the base (1) comprising external terminal connecting parts on two sides, a sliding limiting apparatus being arranged on the top of the external terminal connecting parts of the base (1), and a limiting protruding block (22) being arranged on two sides of the plug-in module (2); each sliding limiting apparatus comprises a hole cover (13), the hole cover (13) being slidably connected to the top of the external terminal connecting part; when the plug-in module (2) is entirely plugged in, part of the hole cover (13) protrudes into a mounting groove (14) of the plug-in module and clamps a fixed limiting apparatus of the plug-in module (2), thereby restricting the plug-in module (2) from falling out of the base (1). When the plug-in module (2) is taken out, the hole covers (13) move to both sides, and the hole covers (13) break contact with the fixed limiting apparatuses to allow the plug-in module (2) to be taken out of the base (1). The present surge protector with an anti-falling structure is structurally stable and reliable, and when the anti-falling structure is not released, the plug-in module cannot be taken out of the base.
A low-voltage controlled fuse comprises a closed flat housing (1); a main circuit (11) and a control circuit (12) are provided in an inner cavity of the flat housing (1); the main circuit (11) comprises a low-melting-point alloy wire (111), a first electrode sheet (112) and a second electrode sheet (113); the low-melting-point alloy wire (111) is located between the first electrode sheet (112) and the second electrode sheet (113); the low-melting-point alloy wire (111) is connected to the first electrode sheet (112) and the second electrode sheet (113) respectively; the end of the first electrode sheet (112) away from the low-melting-point alloy wire (111) and the end of the second electrode sheet (113) away from the low-melting-point alloy wire (111) both extend to the outside of the flat housing (1). The low-voltage controlled fuse can pass through large current and reliably control the cut-off, has a simple structure, and is easy to manufacture; and the low-voltage controlled fuse is applied to a control system of an electric motorcycle, so that abnormal phenomena such as overcharge and over-discharge of a battery can be effectively avoided, thereby avoiding the risk of thermal runaway of the battery.
A box core module, a plug module and a surge protective device. A plug module (8) comprises: a housing (2); bottom plates (4a, 4b); a plurality of box core modules (1) having independent tripping mechanisms; a first pin electrode; and a second pin electrode, wherein the plurality of box core modules (1) are vertically arranged on one side of the bottom plates (4a, 4b) in a side-by-side or opposite manner; the plurality of box core modules (1) are connected by means of internal connection electrodes so as to form a series and/or parallel combined circuit, and the combined circuit is led out by means of the first pin electrode or the second pin electrode. The plug module (8) is combined with a base (9). A modularized multi-form assembly-type surge protective device is provided. By means of different combinations of series connections and parallel connections of all the box core modules, the aim of completing mutual conversion between a high working voltage of the surge protective device and a large lightning strike through-current is achieved under the conditions of the same voltage-limiting element being used and the overall tripping means being unchanged.
H01H 83/10 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
A thermal cutoff includes a first fusible element, a second fusible element, and a closed cavity bounded by a housing having an open end, a cover plate, and a sealant. The two ends of the first fusible element and the two ends of the second fusible element are connected in parallel to a first electrode and a second electrode, respectively. The first fusible element and the second fusible element are provided in the closed cavity. A direction extending from a closed end to the open end of the housing is defined as a vertical direction. The first fusible element and the second fusible element are vertically arranged. The thermal cutoff has a vertical configuration and thus in its entirety has an elongated shape to meet corresponding application requirements.
A thermal cutoff at least includes a current-carrying fusible element having two ends connected to a first electrode and a second electrode. The current-carrying fusible element is provided in a closed cavity bounded by a housing having an opening at one end, a cover plate, and a sealant. The thermal cutoff further includes a first lead wire and a second lead wire each wrapped by an insulating sheath. One end of the first lead wire and one end of the second lead wire are electrically connected to the first electrode and the second electrode. The sealant is filled in the opening of the housing, covers an electrical joint between the first lead wire and a first electrode plate and an end of the first lead wire, and also covers an electrical joint between a second electrode plate and the second lead wire and an end of the second lead wire.
A high-voltage direct-current thermal fuse includes one or more fusible components each having two fusible alloy support arms, a fluxing agent, a fusing cavity, two pins, and an insulation block. Two fusible alloy support arms are arranged opposite, and the fusible component is U-shaped. The fusible component and the fluxing agent are sealed within the fusing cavity. The two pins are respectively connected to the two fusible alloy support arms. The insulation block is arranged between the two fusible alloy support arms and separates the two pins. A volume ratio of the fluxing agent to the fusing cavity is approximately 50% or less, preferably, 10%-50%. The number of the one or more fusible components is at least two, and the at least two fusible components are arranged separately. The thermal fuse can avoid the burst and quickly cut off the current, which provides effective thermal protection for a circuit.
The present disclosure relates to the technical field of lightning protection, and disclosed is a modular surge protector, comprising a housing (1), and a discharge tube unit (2), a first pressure-sensitive resistor unit (3), and a second pressure-sensitive resistor unit (4) which are provided in the housing (1). The first pressure-sensitive resistor unit (3) and the second pressure-sensitive resistor unit (4) are arranged in a stacked manner; the discharge tube unit (2) is arranged on the same side of the first pressure-sensitive resistor unit (3) and the second pressure-sensitive resistor unit (4); a first electrode (101) is led out from the first pressure-sensitive resistor unit (3), a second electrode (102) is led out from the second pressure-sensitive resistor unit (4), and a third electrode (103) is led out from the discharge tube unit. In the present disclosure, three frames work in conjunction with discharge tubes and pressure-sensitive resistors to form modular design, and the discharge tubes are vertically arranged and the pressure-sensitive resistors are horizontally arranged, thereby realizing a compact structure and meeting miniaturized application requirements.
H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
32.
EXPLOSION-RESISTANT FLAME-RETARDANT VARISTOR AND AUTOMATIC PRODUCTION METHOD THEREFOR
An explosion-resistant flame-retardant varistor, and an automatic production method therefor, relating to the technical field of varistors. The varistor comprises a varistor main body (1) and an explosion-resistant flame-retardant housing provided at an outer portion of the varistor main body (1). The housing comprises two identical housing units (2) engaging with each other by means of a fastening structure. The two housing units (2) are combined to form a cavity having an opening. The varistor main body (1) is located in the cavity, and is fixedly held by the two housing units (2). Two pins (11) of the varistor main body (1) extend outwards from a joint between the two housing units (2). A gap between the varistor main body (1) and the two housing units (2) is filled with an insulator. The insulator enters the cavity from an opening of the cavity. A sealing member for sealing the opening of the cavity is provided on the housing. The two housing units (2) of the explosion-resistant flame-retardant varistor are configured to be the same shape, thereby facilitating injection molding and material management. Only one mold needs to be designed, thereby reducing costs of diesinking. The fastening structure is used in the assembly of the housing, thereby facilitating assembly.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
H01C 1/02 - HousingEnclosingEmbeddingFilling the housing or enclosure
H01C 17/02 - Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
33.
SURGE PROTECTION DEVICE HAVING HIGH BREAKING CAPACITY
A surge protection device having high breaking capacity, comprising: a housing (1) having at least two lead-out electrodes (10a, 10b); and a voltage-limiting apparatus (2) and a thermal trip mechanism (3) disposed in the housing (1). The thermal trip mechanism (3) comprises a fixed component (30), a movable component (31), and a thermal trigger device (33). The fixed component (30) and the movable component (31) form a plurality of displacement switches arranged in series, and the thermal trigger device (33) and the movable component (31) are linked. The invention solves the problems in which thermal protection devices of existing surge protection devices do not have overcurrent protection functions, and are prone to false tripping or early tripping when surge currents flow through.
A transient voltage suppressor (TVS) provided with temperature protection, comprising a housing (1), a cover plate (7), a TVS chip (2), a first lead-out electrode (5), and a second lead-out electrode (3), and further comprising a thermal cutoff (4). A first electrode (41) of the thermal cutoff (4) is electrically connected to the first lead-out electrode (5), a second electrode (42) of the thermal cutoff (4) is electrically connected to a first electrode (22) of the TVS chip, and a second electrode (21) of the TVS chip (2) is electrically connected to the second lead-out electrode (3). The TVS chip (2) and the thermal cutoff (4) are accommodated in a cavity formed by the housing (1) and the cover plate (7), and the first lead-out electrode (5) and the second lead-out electrode (3) are led out from the cover plate (7). The solution uses a thermal cutoff to protect a TVS from overheating. The heat generated during the failure of the TVS causes the thermal cutoff to fuse, thereby separating the damaged TVS from the current and preventing a fire. The embodiment has the characteristics of a simple structure, stable and reliable products, and so on.
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 1/00 - Details of emergency protective circuit arrangements
H01L 23/62 - Protection against overcurrent or overload, e.g. fuses, shunts
35.
OVERHEATING AND OVERCURRENT TRIPPING DEVICE AND SURGE PROTECTOR
Disclosed are an overheating and overcurrent tripping device and a surge protector. The overheating and overcurrent tripping device comprises a frame, and a slide block, a spring piece electrode and a compression spring arranged in the frame. In a working state, the spring piece electrode is connected to an electrode of a protection device by means of a fusible alloy, and the spring piece electrode abuts against the slide block and enables the compression spring to be in a compressed state; during thermal tripping, the fusible alloy melts, and the slide block moves in the frame under the action of the compression spring to cut off the connection between the spring piece electrode and a piezoresistor; and the spring piece electrode is provided with a slot, and when a lightning stroke current exceeds the maximum flux or a fault current flows through the spring piece electrode, the spring piece electrode can be broken at the slot, and the slide block moves in the frame under the action of the compression spring to cut off the connection between the spring piece electrode and the piezoresistor. According to the present application, a slot is provided in a spring piece electrode, such that a thermal tripping device has overheating and overcurrent protection functions, and the speed of transferring heat to a spring piece is further increased when a piezoresistor or a discharge tube fails, thereby increasing the thermal tripping speed.
A thermal-protection varistor; a varistor component (2), a movable electrode (3), and a blocking component (5) are provided within an inner frame (6), and the varistor component (2) and the movable electrode (3) are connected by means of soldering dots; the blocking component (5) is located between the movable electrode (3) and the varistor component (2) and abuts against the movable electrode (3); the blocking component (5) comprises a first sliding device, and the first sliding device comprises a first sliding block (502) and a first elastic device (501); one end of the first elastic device (501) is connected to the inner frame (6), while the other end is connected to the first sliding block (502); the blocking component (5) further comprises a second sliding device that is elastic, and the second sliding device is disposed between the first sliding block (502) and the movable electrode (3) and abuts against the movable electrode (3); when the blocking component (5) acts, the second sliding device slides relative to the first sliding block (502) in the same direction as the first sliding block (502). The relative movement of the first sliding device and the second sliding device can effectively increase the creepage distance of a product, which is beneficial in accelerating the extension of an electric arc such that the use of the thermal-protection varistor is safer.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
A thermally protected metal-oxide varistor is provided, including a disconnecting unit, a first varistor assembly and a second varistor assembly. The first varistor assembly and the second varistor assembly are connected in series through a low-melting-point alloy layer; wherein when the low-melting-point alloy layer is fused, the disconnecting unit acts to cut off the low-melting-point alloy. The two varistors are connected directly through solder joints without any transition connection member. The heat transfer path is reduced to the shortest path, and a faster response is realized compared to conventional products formed by a varistor and a disconnecting unit when abnormal over-current passes. Moreover, the slider functions as a physical separator capable of isolating the two varistors after the solder joints are fused, which further diminishes the risk of fire occurrence caused by the failure of instantly blocking current by the disconnecting unit when the varistor breaks down by over-current.
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
A thermal cutoff comprises: a first fusible element and a second fusible element, wherein respective two ends thereof are connected in parallel to a first electrode and a second electrode; and a closed cavity bounded by a housing (101) having an open end, a cover plate (102) and a sealant (103), the first fusible element and the second fusible element being provided therein. A direction extending from a closed end to the open end of the housing (101) is defined as a vertical direction. The first fusible element and the second fusible element are arranged such that one is positioned above the other. The above technical solution realizes a thermal cutoff having a vertically configured structure, such that the thermal cutoff has an elongated shape and meets application requirements in corresponding scenarios.
A thermal cutoff at least comprises a current carrying fusible element (104, 204, 312, 404, 504, 604) having two ends respectively connected to a first electrode (107, 207, 308, 408, 508, 607) and a second electrode (108, 208, 309, 409, 509, 608). The current carrying fusible element is provided in a closed cavity bounded by a housing (101, 201, 301, 401, 501, 601) having an open end, a cover plate (102, 202, 302, 402, 502, 602) and a sealant (103, 203, 304, 403, 503, 603). The thermal cutoff further comprises a first lead (109, 209, 310, 412, 512, 609) and a second lead (110, 210, 311, 413, 513, 610) enclosed in insulating sheaths. One ends of the first lead and the second lead are respectively electrically connected to the first electrode and the second electrode. The sealant fills in the opening of the housing, at least covers an electrical joint between the first lead and a first electrode plate and an end of the first lead, and covers an electrical joint between a second electrode plate and the second lead and an end of the second lead. The thermal cutoff exhibits good sealing and protection performance, and is applicable to corresponding scenarios.
The present application provides a multi-gap surge protection device, comprising: a housing having a chamber, the two ends of the housing being a first lead end and a second lead end, respectively; N discharge gaps provided in the chamber, the first discharge gap among the N discharge gaps being connected to the first lead end, and the N-th discharge gap being connected to the second lead end, wherein N is an integer, and N≥2; and an auxiliary gap passing through the N discharge gaps, a first end of the auxiliary gap being connected to the first lead end by means of a first coupling impedance, and a second end of the auxiliary gap being connected to the second lead end. The surge protection device can effectively reduce the breakdown voltage and improve the reliability of protection to electrical equipment.
H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
A surge protector, relating to the technical field of lightning protection, and comprising a housing (20), a first varistor (MOV1) and a first thermal protection unit thereof, a second varistor (MOV2) and a second thermal protection unit thereof, and a discharge tube group (15). The discharge tube group (15), the first thermal protection unit, and the second thermal protection unit serve as intermediate layers, and the first varistor (MOV1) and the second varistor (MOV2) respectively serve as outer layers, so as to form a sandwich structure. Compared with an existing surge protector, on the basis of approximately identical protection, the surge protector of the present invention makes full use of the difference in size between the varistors (5a, 5b) and discharge tubes (GDT) in structure, and the discharge tube group (15) after the discharge tubes (GDT) are connected in series and two groups of thermal trip devices (T1, T2) and detection switches (K1, K2) are disposed between the two varistors (5a, 5b), to make the main body form a sandwich structure. Therefore, the structure of the surge protector is compact and reasonable, and meets the application requirements of miniaturization.
A high-voltage fusing apparatus, comprising: a current fuse, a temperature fuse and a current-carrying fuse, wherein the current fuse is connected to the temperature fuse in series; series branches of the current fuse and the temperature fuse are connected to the current-carrying fuse in parallel; a resistance value of the current-carrying fuse is less than a resistance value of the current fuse; and a fusing temperature in the current-carrying fuse is lower than a fusing temperature of the temperature fuse. The high-voltage fusing apparatus of the present application can quickly cut off a high-voltage circuit, and can effectively perform overheating protection on a high-voltage heating circuit.
A surge protection device and system comprise an impedance device, a voltage-limiting surge protector, and a switch surge protector. The impedance device is connected in parallel to the voltage-limiting surge protector, and a parallel branch of the impedance device and the voltage-limiting surge protector is connected in series to the switch surge protector, such that a discharge channel for lightning surge currents is formed, wherein a series branch of the impedance device and the switch surge protector forms a discharge channel for freewheeling currents. The surge protection device and system of the present application can effectively improve tolerance to multiple pulses, and prevent failure of arc extinction.
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
Disclosed are a surge protection device and system. The device comprises: a first switch type surge protector (PG), a second switch type surge protector (SG) and an impedance device (SI); the second switch type surge protector (SG) being connected in series with the first switch type surge protector (PG) to form a discharge channel of lightning surge current, the impedance device (SI) being connected in parallel with the first switch type surge protector (PG) to limit the amplitude of the follow current of the first switch type surge protector (PG) and to form a discharging channel of the follow current together with the second switch type surge protector (SG). The surge protection device and system can effectively avoid arc extinction failure and can improve the stability of voltage protection.
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
A high-voltage direct-current thermal fuse including: a fusible component having two fusible alloy support arms parallel to each other; a fluxing agent; a fusing cavity; and two pins. The fusible component and the fluxing agent are sealed within the fusing cavity. The two pins are respectively connected to the two support arms. Technically, the fluxing agent only needs to have contact with the fusible alloy. Practically, the fluxing agent is usually coated over the fusible alloy. The fusible component in the high-voltage direct-current thermal fuse of the present application is a U-shaped structure having two parallel support arms. A high electric field intensity is generated when an arc is being cut off, as a result, the electrons repel each other, and the arc is lengthened, thereby increasing the speed of cutting off the arc.
H01H 85/12 - Two or more separate fusible members in parallel
H01H 85/38 - Means for extinguishing or suppressing arc
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
A surge protector module, comprising line varistors (4a, 4b) connected in series and a heat detaching unit (5). The heat detaching unit comprises elastic members (503a, 503b), insulating members (504a, 504b), alloys having a low melting point (505a, 505b), a connecting member (501), and leads (502a, 502b) disposed on the connecting member. The insulating members have an opening. The elastic members are disposed in the openings, and the elastic members have a hollow passage. The leads pass through the passages and are connected to the lead varistors via the alloys having a low melting point. The elastic members abut the insulating members at one end, abut the connecting member at another end, and are in a compressed state. The insulating members abut the alloys having a low melting point under a rebound force of the elastic members. A plurality of surge protection devices generate heat and transfer the heat to a detaching solder joint, such that the alloys having a low melting point are disconnected early when a fault occurs in a surge protection device, thereby reducing the risk of insulation failure and fire. The surge protector assembly is small, integrated, and has minimal height; demonstrates obvious indication effects and strong safety performance; and is convenient to install and maintain.
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
The present application discloses a novel thermally protected varistor, comprising a detachment device, a first varistor assembly, and a second varistor assembly. The first varistor assembly and the second varistor assembly are connected in series via an alloy layer having a low melting point. If the alloy layer having a low melting point is melted, the detachment device is actuated to divide the alloy having a low melting point. Two varistors of the present application are directly connected via a solder joint without any transitional connection, such that a heat transfer path is reduced to a minimum. When compared to conventional products comprising a varistor and a detachment device, the novel thermally protected varistor of the present application has a shorter actuation time when an abnormal current passes therethrough. The two varistors are also physically separated by a sliding block after the solder joint has melted, so as to further reduce the risk of a fire caused by a situation in which a detachment device cannot stop a current when a varistor through which the current passes breaks down due to a short circuit.
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
Disclosed in the present application is a temperature controller with thermal protection, comprising an action unit and a thermal fuse device that are adjacent to each other and connected in series. The action unit comprises a movable contact device and a stationary contact device, the movable contact device comprises a bimetallic strip and a movable contact, the stationary contact device comprises a stationary contact adapted to be correspondingly in contact with the movable contact, the movable contact and the stationary contact are disconnected or connected under the action of the bimetallic strip, and the action temperature of the thermal fuse device is higher than that of the bimetallic strip. When a heavy current flows through a snap-action thermostat, the contacts are adhered together and the loop cannot be disconnected, an abnormal temperature rise is produced during contact adhesion, and because the contacts of the action unit and the fusible alloy of a fusing unit are located at the same conduction path, the heat transfer path is shortened, thermal diffusion is reduced, and the heat can quickly be transmitted to the fusible alloy in the same housing; fusible alloy is heated and shrinks to conductors at both sides under the tension of a fusing assistant agent, so that the loop is safely disconnected, and the circuit safety is effectively protected.
The present application provides a high-voltage fuse comprising a thermal fuse device and a high-voltage breaking device connected in parallel. The high-voltage breaking device comprises a fuse link. The fuse link is an n-shaped structure having parallel segments at two ends thereof. The thermal fuse device has a resistance value lower than the resistance value of the fuse link. The thermal fuse device has a melting point lower than the melting point of the fuse link. The high-voltage fuse can realize a thermal cutoff function. The n-shaped fuse link enables an arc to be cut off quickly to execute high-voltage breaking, thereby ensuring the safety of a circuit.
H01H 85/11 - Fusible members characterised by the shape or form of the fusible member with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices
H01H 85/12 - Two or more separate fusible members in parallel
H01H 85/38 - Means for extinguishing or suppressing arc
A thermal fuse resistor including a ceramic substrate, a resistor body, a temperature sensing body, a first electrode cap, a second electrode cap, a first lead wire, a second lead wire, and a third lead wire. A first end of the ceramic substrate is provided with a first electrode cap, and a second end of the ceramic substrate is provided with a second electrode cap. The first electrode cap includes a main body, an inner end, and an outer end with an opening. The outer end includes an everted edge closely contacting the first end of the ceramic substrate. The main body and the inner end are arranged inside the ceramic substrate. The first lead wire extends outward from an outer end. One end of the third lead wire is electrically connected to the second electrode cap.
H01H 85/02 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive Details
A thermally protected varistor, comprising a varistor chip (1), a temperature fuse (2), and a lead wire (4). The varistor chip (1) comprises a first conductive layer (11) and a second conductive layer (12). The lead wire (4) comprises a first lead wire (41), a second lead wire (42), and a third lead wire (43). One end of the first lead wire (41) is connected to the first conductive layer (11), and the other end of the first lead wire (41) is extracted. A first end of the temperature fuse (2) is extracted as the second lead wire (42). A second end of the temperature fuse (2) is connected to the second conductive layer (12). One end of the third lead wire (43) is connected to the second conductive layer (12), and the other end of the third lead wire (43) is extracted. The temperature fuse (2) is an axial temperature fuse and is closely attached to the varistor chip (1). The thermally protected varistor can transfer the heat generated by the varistor chip (1) to the temperature fuse (2) more efficiently and accurately when the varistor chip (1) is abnormal, thereby shortening the time required by the temperature fuse (2) for disconnecting a circuit. The thermal protective varistor is small in volume, easy to install and manufacture, simple in structure, and low in cost.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
Provided is a high-voltage direct-current cut-off device, comprising a first pin (1) and a second pin (2), wherein the first pin comprises a first end portion (11) and a second end portion (12), a cut-off point (3) is disposed between the first end portion and the second pin, and a connection line, between the first end portion and the second pin, and the second end portion are on the same plane. The high-voltage direct-current cut-off device can cut off an electric arc generated in the process of high-voltage direct-current power supply, thereby ensuring the safety of high-voltage direct-current power supply.
The present application provides a high-voltage direct-current thermal fuse comprising: a fusible component comprising two parallel fusible alloy support arms; a fuse resin; a fuse cavity, the fusible component and the fuse resin being sealed within the fuse cavity; and two pins respectively connected to the two arms. In principle, the fuse resin and the fusible alloy need only come into contact with each other to achieve the desired effect. In the prior art, generally the fusible alloy is coated with the resin. The fusible component in the high-voltage direct-current thermal fuse of the present application is a U-shaped structure having two parallel support arms. During electric arc cut-off, high electric field intensity, mutually repelling electrons, and electric arc lengthening allow for rapid cut off of the arc. The invention may be used as thermal protection on a high-voltage direct-current power device. When the power device overheats to the point of the operating temperature of the fusible alloy, breakage occurs rapidly so as to protect the circuit.
A temperature-sensing switch in a bridge-type contact structure; the switch utilizes a state-changing characteristic of a temperature-sensing element (103) at a predetermined temperature, and by providing an elastic device and driving a bridge-type movable spring structure, the switch achieves separation or engagement of movable contacts (107a and 107b) and static contacts (112a and 112b), and further achieves turn-on and turn-off of a wire between two static spring feet (110 and 111). Thus, an active temperature switch is provided, which is used for protection against catastrophic thermal runaway and for end-user safety protection. The switch may interrupt electric current when a power device is heated to a special-rated trip temperature thereof. Furthermore, an active temperature-sensing switch is also provided, which may turn on an alarm circuit when the ambient temperature reaches a preset temperature and sound an alarm.
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
A stack-type temperature safety device comprises two Z-shaped electrode members respectively fixed to two side surfaces of a frame having separate compartments (103, 203) in a compartment constructed from a non-metal housing (101, 201) and a cover plate (102, 202). A fusible alloy (104, 204) wrapped by a flux (105, 205) is soldered between the two electrode members. The blocking plate divides the frame (103, 203) into independent compartments for respective fusible alloys (104, 204). An epoxy resin (109, 212) is filled in a gap in the housing (101, 201) and sealed by the cover plate (102, 202). In the event of an abnormal external temperature, heat is transferred to the fusible alloy (104, 204). The fusible alloy (104, 204) contracts, under tension of the flux (105, 205), towards two sides to effectively break a circuit. The safety device further comprises a heating system (200) with overheating protection that can receive a signal from a system to automatically heat the fusible alloy (104, 204), thereby providing the system with double protection.
A high-voltage direct-current thermal fuse, includes a high-voltage low-current thermal fuse connected to a high-voltage direct-current circuit. The high-voltage low-current thermal fuse includes a casing, fusible alloy wires, and two leads extending out of the casing. The fusible alloy wires are connected between the two leads. One of the leads is sequentially sleeved with an arc extinguishing sleeve and a spring. One end of the arc extinguishing sleeve is in contact with the fusible alloy wires; and the other end of the arc extinguishing sleeve is in contact with the spring. One end of the spring is connected to the internal end face of the casing; and the spring is in a compressed state. The high-voltage direct-current thermal fuse further includes a conventional thermal fuse connected in parallel to the high-voltage low-current thermal fuse; or further includes a current fuse connected in series with the high-voltage low-current thermal fuse.
An photocontroller with surge protecting function includes an photocontroller unit, a surge protection unit, and an photocontroller base. On the basis of an existing photocontroller unit and an existing photocontroller base, the surge protection unit is integrated inside the photocontroller unit or the surge protection unit can be connected in a plug-in manner. The surge protection unit is connected in parallel to a power supply phase line terminal and a neutral line terminal of the photocontroller unit. A ground line terminal of the surge protection unit is connected, by means of a ground connector, to the conductive part disposed on the photocontroller base. The conductive piece is grounded. The photocontroller and the surge protection function are combined, which can effectively discharge a surge current, suppress a surge voltage, is easy to mount and replace, and can reduce post-maintenance cost.
F21V 23/06 - Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices
H01H 36/00 - Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
The present invention discloses a device comprising a thermal fuse, a resistor and a protective casing. The protective casing provides housing for the thermal fuse and the resistor and increases the anti-explosion properties and insulating and voltage-withstanding properties at the same time. The thermal fuse and the resistor can be used as a basic unit and be directly installed into a switch-mode power supply. It is capable of replacing the existing simple wirewound resistor or the wirewound resistor with an external contact type thermal fuse, and realizing the functions of general impedance, over-current fuse protection, surge protection, anti-explosion and over-temperature protection in case of overloading.
H01C 3/20 - Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical, or toroidal winding wound on cylindrical or prismatic base
The present invention discloses a thermal fuse having dual metal elastic clamps, comprising: an insulating cylindrical tube; a first metal cap, a temperature sensing chamber formed by the first metal cap, the second metal tube and the inner side wall of the middle part of the through hole. The temperature sensing chamber axially arranges a plurality of components in the following sequence: a compressed spring; an insulating supporting pillar; a second metal elastic clamp; a connecting pillar a first metal elastic clamp; an organic temperature sensing body capable of melting when heating. The first metal elastic clamp, the second metal elastic clamp and the connecting pillar forms a movable conductive bridge. The movable conductive bridge slides flexibly in the temperature sensing chamber and has low contacting resistance with the first metal cap and the second metal tube. The above structure can withstand large current and has high reliability.
H01H 85/36 - Means for applying mechanical tension to fusible member
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
A novel thermal-protection metal-oxide varistor and a surge protector. The novel thermal-protection metal-oxide varistor comprises a metal-oxide varistor (MOV) and an alloyed thermal cutoff (TCO). The metal-oxide varistor comprises a metal-oxide varistor substrate, a first MOV metal electrode and a second MOV metal electrode. The alloyed thermal cutoff comprises a housing, a first TCO electrode, a second TCO electrode and an alloy wire with a low melting point which is welded between the first TCO electrode and the second TCO electrode, wherein the second MOV metal electrode and the first TCO electrode are the same electrode; and the alloy wire with a low melting point is placed in the housing. The present application has the following advantages of shortening a heat conduction path between the metal-oxide varistor and the alloyed thermal cutoff, and relatively effectively reducing the thermal impedance of the heat conduction path, thereby shortening the time required by the thermal cutoff to open a circuit when the metal-oxide varistor abnormally emits heat, improving the validity of a thermal protection function of the thermal cutoff, and achieving the purpose of improving the usage security of the metal-oxide varistor.
H01C 1/16 - Resistor networks not otherwise provided for
H01C 1/144 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors the terminals or tapping points being welded or soldered
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
A high-voltage direct-current temperature fuse at least comprises a high-voltage low-current temperature fuse (300) connected to a high-voltage direct-current circuit. The high-voltage low-current temperature fuse comprises a casing (301), fusible alloy wires (303) encapsulated in the casing and two pins (306, 307) extending out of the casing, wherein the fusible alloy wires are connected between the two pins. One of the pins is sequentially sleeved with an arc extinguishing sleeve (304) and a spring (305). One end of the arc extinguishing sleeve is in contact with the fusible alloy wires; and the other end of the arc extinguishing sleeve is in contact with the spring. One end of the spring is connected to the inner end face of the casing; and the spring is in a compressed state. The high-voltage direct-current temperature fuse further comprises a conventional temperature fuse (100) connected in parallel with the high-voltage low-current temperature fuse; or further comprises a current fuse (200) connected in series with the high-voltage low-current temperature fuse. The high-voltage direct-current temperature fuse solves the problem of timely arc cutting-off and can be directly applied to a high-voltage direct-current circuit.
An optical controller with a surge protecting function comprises an optical controller unit (1), a surge protecting unit (2A, 2B), and an optical controller base (3). On the basis of an existing optical controller unit and an existing optical controller base, the surge protecting unit (2A) is integrated inside the optical controller unit (1) or the surge protecting unit (2B) that can be connected in an insertion manner is provided. The surge protecting unit (2A, 2B) is connected in parallel to a power supply phase wire (L in) end and a neutral wire (N) end of the optical controller unit. A grounding wire (PE) end of the surge protecting unit (2A, 2B) is connected, by means of a grounding connector (4), to the conductive piece correspondingly disposed on the optical controller base (3). The conductive piece is connected to the ground. The optical controller is combined with the surge protecting function, can effectively discharge a surge current, suppress a surge voltage, is easy to mount and replace, and can reduce post-maintenance cost.
A thermal fuse having dual elastic clamps, comprising an insulating cylindrical tube (101), a first metal cap (102A) fixed axially on one end of a through hole, and an outward-extending first lead line fixed thereon; a second metal tube (102B) fixed axially on another end of the through hole, and an outward-extending second lead line fixed thereon; the first metal cap (102A), the second metal tube (102B), and part of the inner wall of the through hole form a temperature-sensing chamber; a compression spring, an insulating support column (402), a second metal elastic clamp (302), a connection column (303), a first metal elastic clamp (301), an organic temperature-sensing body (201) that melts due to heat are fixed inside of the temperature-sensing chamber in order. The first and second metal elastic clamps and the connection column form a conductive bridge body and form a movable conductive part that can flexibly move and have small contact resistance with the first metal cap and the second metal tube, thereby bearing relatively large operation currents and having high reliability.
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
An electronic protection component comprises an outer case bounding an outer cavity therein; a varistor with a first varistor lead connected to a first varistor electrode and a second varistor lead connected to a second varistor electrode, wherein the varistor is placed in the outer cavity; a low melting point alloy wire with a first thermal fuse lead in one end and a second thermal fuse lead in the other end; wherein either the first thermal fuse lead or the second fuse lead is connected to either the first varistor electrode or the second varistor electrode therefore forming a lead junction.
A breaker for actively cutting off a circuit, in particular a breaker used in a lithium battery power supply, the breaker comprising a housing (400), a temperature sensing mechanism (100), a heat generation mechanism (200) and a bridge contact mechanism (300); the temperature sensing mechanism (100) comprises a temperature sensing body (102);the heat generation mechanism (200) comprises a heat generation component; and the bridge contact mechanism (300) comprises a bridge movable reed (305), at least one bridge static reed (307, 313), an insulation bracket (303) and a first resilient piece (314). The temperature sensing body (102), as a support component of one end of the insulation bracket (303), is controlled by the heat generation component; the bridge movable reed (305) is installed on the insulation bracket (303), one surface thereof directed towards the other end of the insulation bracket (303) forms a contact with the bridge static reeds (307, 313). The bridge movable reed (305), the bridge static reeds (307, 313) and the lithium battery or lithium battery assembly form a lithium battery primary loop in series; the first resilient piece (314) is pressed upward between the other end of the insulation bracket (303) and the inner wall of the housing (400). The breaker coordinated with the battery management system cuts the lithium battery primary loop when over-voltage, over-charge or over-discharge occur with the lithium battery, and eliminates potential hazards such as fire or explosion of the lithium battery under abnormal conditions.
The present invention discloses a device comprising a thermal fuse and a resistor, the solid ceramic base of the wirewound resistor is changed to be hollow, forming a ceramic tube; the thermal fuse is placed in the solid ceramic base, the ceramic tube provides housing for the thermal fuse; a lead wire of the thermal fuse passes through an end cap of an end of the wirewound resistor, the other end of the thermal fuse extends out of the end cap of the other end of the wirewound resistor, the end cap of the wirewound resistor extends outwardly with a lead wire, then an epoxy resin is used to encapsulate the device. The present invention can be used as a basic unit and directly installed in an existing high-frequency charger; it is capable of replacing the existing simple wirewound resistor or the wirewound resistor with an external contact type thermal fuse, and realizing triple functions of general impedance, over-current fuse protection, and over-temperature protection in case of overload.
H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
H01C 1/14 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors
H01C 3/20 - Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical, or toroidal winding wound on cylindrical or prismatic base
H01C 1/08 - Cooling, heating or ventilating arrangements
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
H01H 85/02 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive Details
A protector for preventing a lithium battery from being charged by an overvoltage adopts two shaft-like temperature fuses in series, the temperature fuses being connected in series in a positive electrode loop of a circuit; one end of a wire-wound resister is connected to a joint of the two temperature fuses, and the other end is in series with a transient voltage suppressor (TVS) tube; the other end of the TVS tube is connected to a negative electrode of the circuit. A hollow ceramic tube having two through holes is disposed on the protector; the shaft-like temperature fuses are respectively mounted in the two through holes, and the two temperature fuses are connected at an end of the ceramic tube, forming a series circuit that connects the positive electrode of the lithium battery and a positive electrode of a charging power supply. The wire-wound resister R is disposed on an outer surface of the ceramic tube; one end of the ceramic tube is connected to the joint of the two temperature fuses, and the other end is connected to a TVS tube; the other end of the TVS tube is connected to the negative electrode of the circuit. According to the present invention, when exceptional overvoltage charging occurs, the TVS tube is turned on, and the wire-wound resistor is heated rapidly, so that the temperature fuses are disconnected rapidly, thereby cutting off the power. The protector can accept an instruction of cutting off the circuit sent by a BMS management system of the lithium battery, so that the wire-wound resistor is directly turned on and heated, and the temperature fuses are disconnected rapidly, thereby cutting off the power.
H02H 7/18 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteriesEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for accumulators
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
70.
FULL-MODEL OVERVOLTAGE PROTECTION MODULE FOR ALTERNATING CURRENT CIRCUIT
A full-model overvoltage protection module for an alternating current circuit, integrating a first alloy-type temperature fuse (TCO1), a second alloy-type temperature fuse (TCO2), a third alloy-type temperature fuse (TCO3), a first varistor (MOV1), a second varistor (MOV2) and one type of gas discharge tube (GDT) into a modular structure. The first varistor (MOV1) and the second varistor (MOV2) between a live wire-ground wire (L-G) and a neutral wire-ground wire (N-G) in the module can effectively absorb a surging overvoltage. The first alloy-type temperature fuse (TCO1) and the second alloy-type temperature fuse (TCO2) close to the surface of the first varistor (MOV1) and the second varistor (MOV2) in the modular structure can effectively avoid fire hazards caused by varistor degradation/failure or a temporary overvoltage. The gas discharge tube (GDT) also radiates heat when the use process is abnormal, and the gas discharge tube (GDT) is also connected to the temperature fuse (TCO3) in series so that when the temperature of the gas discharge tube (GTD) is too high, the temperature fuse (TCO3) can disconnect the circuit. The full-model overvoltage protection module with the integrated structure and for the failure protection of the first varistor (MOV1), the second varistor (MOV2) and the gas discharge tube (GDT) can effectively prevent the fire hazards caused by degradation or failure of the first varistor (MOV1), the second varistor (MOV2) and the gas discharge tube (GDT).
H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
H02H 5/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
An overvoltage protection module for a DC circuit, comprising a thermal cutoff fuse (401A), a varistor, and a gas discharge tube (402). The thermal cutoff fuse (401A), varistor, and gas discharge tube (402) are connected in series successively inside a module; one terminal of the thermal cutoff fuse (401A) is used as a first pin (508); the connection point between the thermal cutoff fuse (401A) and the varistor is used as a second pin (506); the connection point between the varistor and the gas discharge tube (402) is used as a third pin (507); and one terminal of the gas discharge tube (402) is used as a fourth pin (403). Integrating the thermal cutoff fuse (TCO), varistor (MOV), and gas discharge tube (GDT) as one and soldering according to the PCB board method effectively reduces module volume. Application to a DC power supply, and especially a 48V DC power supply for communications, effectively and securely protects against overvoltage surges.
Disclosed is an apparatus comprising a thermal fuse and a resistor. The solid ceramic substrate of a wire wound resistor is changed to hollow, forming a ceramic tube (1). A thermal fuse is built-in the ceramic tube (1), the ceramic tube (1) becoming the housing of the thermal fuse. A lead wire (2b) of the thermal fuse passes through an end cover (5b) of the wire wound resistor at one end, connecting tightly thereto and forming a serial connection structure. A lead wire (2a) on the other end of the thermal fuse passes through the end cover (5a) of the wire wound resistor at the opening of the other end and extends outwardly. Also extending outwardly from the end cover (5a) of the wire wound resistor having an opening is a lead wire (8). The entire product is then encapsulated in epoxy resin (9). The apparatus can be used as a basic unit and directly installed in a existing high-frequency charger, replacing the existing simple wire wound resistor or wire wound resistor protected by an external thermal fuse, achieving the triple function of general impedance, over-current fuse protection, and over-temperature protection function in case of overload.
H01C 3/20 - Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical, or toroidal winding wound on cylindrical or prismatic base
A controlled high current fuse-link is provided, which can protect a rechargeable battery and carry a rating working current of scores or hundreds of Amperes. The controlled high current fuse-link comprises a non-metallic housing (5), which supports two metal plates (6,7). One end of each of the metal plates (6,7) is connected to a high current circuit. The metal plates (6,7) are arranged in parallel, and one side of each of the metal plates (6,7) is designed like a comb by welding strips (11a,11b). Some low melting point alloy wires (3) arranged in parallel to constitute a main fuse-link (1) are linked with the welding strips (11a,11b). The controlled high current fuse-link has two heaters (8,9), which are thermally coupled to the metal plates (6,7) and are powered by another current loop which has no current flowing through normally. When the current of a main circuit is abnormal or the temperature of a battery is abnormal, a monitor circuit will energize the heaters (8,9)，and the metal plates (6,7) will be heated up by the heaters (8,9), then the main fuse-link (1) will melt with each of the alloy wires (3) broken completely by the action of fluxes. Furthermore, there is a small thermal fuse (10) connected in series to the heaters (8,9). As the melting temperature of the small thermal fuse (10) is higher than that of the main fuse-link (1), the main fuse-link (1) is broken earlier.
H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
74.
Metal oxide varistor with built-in alloy-type thermal fuse
An electronic protection component incorporates both a varistor and an alloy-type thermal fuse. In one embodiment, a melting promoting agent or flux contacts and surrounds both the varistor and the fuse in common in a shared cavity of a case. In another embodiment, the fuse and the flux are disposed in an inner case, which is disposed in contact with the varistor in an outer case. Thus, the varistor and the thermal fuse are incorporated so that the speed of heat transfer is fast, the response time is fast, and the installation for use is convenient.
An electronic protection component with a varistor and an alloy-type thermal fuse is disclosed. The varistor and the alloy-type thermal fuse are provide in a closed cavity, with one surface of varistor being close to one surface of the thermal fuse. The leads of the varistor and the alloy-type thermal fuse extend outside of the closed cavity which is filled with an alloy flux. Varistor and thermal fuse are located in close proximity, so that the speed of heat transfer is fast and the component is convenient to install.
H01C 7/10 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
H02H 3/20 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage
