Abstract

An apparatus for power monitoring and voltage suppression comprising a reference node, a first transformer, a second transformer, a third transformer, a resistive element, a ground fault indicator, a current detector, a power quality meter, and a meter power supply is provided. The transformers have first sides and secondary sides, with the secondary sides connected in series. The resistive element and the ground fault indicator are connected in parallel to the secondary sides of the transformers. The circuit connecting the secondary sides, the resistive element, and the ground fault indicator is not electrically connected to ground.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
• H01F 27/42 - Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors or choke coils

Abstract

An apparatus for power monitoring and voltage suppression comprising a reference node, a first transformer, a second transformer, a third transformer, a resistive element, a ground fault indicator, a current detector, a power quality meter, and a meter power supply is provided. The transformers have first sides and secondary sides, with the secondary sides connected in series. The resistive element and the ground fault indicator are connected in parallel to the secondary sides of the transformers. The circuit connecting the secondary sides, the resistive element, and the ground fault indicator is not electrically connected to ground.

IPC Classes  ?

• G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
• G08B 21/18 - Status alarms
• G08B 25/00 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
• H02B 1/56 - CoolingVentilation
• H02B 15/00 - Supervisory desks or panels for centralised control or display
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network

Abstract

Phaseback DC choke includes a common core, a first coil formed about the common core, and a second coil formed about the common core in parallel opposing configuration relative the first coil. A DC circuit including a Phaseback DC choke is also provided.

IPC Classes  ?

• H02M 1/12 - Arrangements for reducing harmonics from AC input or output
• H01F 27/28 - CoilsWindingsConductive connections
• H01F 17/04 - Fixed inductances of the signal type with magnetic core
• H01F 17/00 - Fixed inductances of the signal type

Abstract

Three single-phase transformers having primary sides connected in a delta connection and the secondary sides connected in a series-delta connection. Each power line is connected through a fused disconnect to two primary terminals, each primary terminal on a different transformer. A second terminal on the secondary side of the first phase transformer is connected to a first terminal on the secondary side of the third transformer through a non-inductive grid resistor. The second terminal on the secondary side of the third transformer is connected to the first terminal on the secondary side of a second transformer. The second terminal on the secondary side of the second transformer is connected to the first terminal on the secondary side of the first transformer. In this fashion, the secondary sides of each of the single-phase transformers are connected in series through a non-inductive grid resistor.

IPC Classes  ?

• H02J 1/02 - Arrangements for reducing harmonics or ripples

Abstract

In accordance with the disclosed subject matter herein, an apparatus for suppressing in a split-phase power system, effects of line-to-ground transient voltage spikes, balancing phase voltage with respect to ground, filtering phase voltage harmonics, cleaning up electrical noise in a split-phase power system, redirecting energy and absorbing electrical noise, protecting or replacing typical TVSS (transient voltage surge suppressor) units. The apparatus of the present invention can not be damaged by electrical noise. It uses virtually no energy in monitor mode and cannot draw over 3 amps. The apparatus of the present invention can be applied to single-phase lines from center tapped delta power transformers. In some embodiments of the disclosed subject matter, an apparatus for use with a power supply bus having at least a first power line and a second power line. An exemplary apparatus includes an interface having an input side and an output side, the input side capable of being coupled to at least the first power line, the second power line and ground node, and the output side of the interface having at least first and second output nodes.

IPC Classes  ?

• H02H 3/22 - 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 of short duration, e.g. lightning