An apparatus for creating and training an artificial neural network (NN) performs iterations in which it implements and tests a version of a NN model, analyses the performance of the current NN model, generates a new NN module for improving the performance of the current NN model, adds the new NN module to the structure of the existing NN model to create a new NN model for executing, testing and analysing in the next iteration. In this way, the apparatus combines the creation and the testing of the NN model thereby improving the overall efficiency and the effectiveness of the development of NN based AI systems.
A switching device comprising first and second body parts and a first operating device for moving the body parts into a closed state. A piezoelectric actuator is coupled to each body part and is operable to move the body parts part away from one another. The switching device may be incorporated into an actuator for operating the vacuum interrupter of a vacuum circuit breaker.
A vacuum circuit breaker comprising a vacuum interrupter and an actuator coupled to the vacuum interrupter. The vacuum interrupter and actuator are located in a vacuum chamber that is partitioned into first and second vacuum sub-chambers. The vacuum interrupter is located in the first sub-chamber and the actuator is located in the second sub-chamber. The partition is configured to support molecular flow between the first and second sub-chambers.
An apparatus for creating and training an artificial neural network (NN) performs iterations in which it implements and tests a version of a NN model, analyses the performance of the current NN model, generates a new NN module for improving the performance of the current NN model, adds the new NN module to the structure of the existing NN model to create a new NN model for executing, testing and analysing in the next iteration. In this way, the apparatus combines the creation and the testing of the NN model thereby improving the overall efficiency and the effectiveness of the development of NN based AI systems.
A vacuum circuit breaker comprises a vacuum interrupter operable between a closed state and an open state, and an actuator. The actuator comprises a piezoelectric driving element that is expandable and contractable along an expansion axis in response to an electrical input signal. The actuator further comprises a mechanical amplifying structure extendable along an actuation axis and being mechanically coupled to the piezoelectric driver such that expansion or contraction of said piezoelectric driving element causes the amplifying structure to extend or retract along the actuation axis. The mechanical amplifying structure is coupled to the vacuum interrupter for operating the vacuum interrupter between said closed and open states.
H01H 1/02 - Contacts characterised by the material thereof
H01H 1/50 - Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
H01H 3/22 - Power arrangements internal to the switch for operating the driving mechanism
H01H 33/28 - Power arrangements internal to the switch for operating the driving mechanism
H01H 33/664 - ContactsArc-extinguishing means, e.g. arcing rings
A switching device comprising first and second body parts and a first operating device for moving the body parts into a closed state. A piezoelectric actuator is coupled to each body part and is operable to move the body parts part away from one another. The switching device may be incorporated into an actuator for operating the vacuum interrupter of a vacuum circuit breaker.
A vacuum circuit breaker comprising a vacuum interrupter and an actuator coupled to the vacuum interrupter. The vacuum interrupter and actuator are located in a vacuum chamber that is partitioned into first and second vacuum sub-chambers. The vacuum interrupter islocated in the first sub-chamber and the actuator is located in the second sub-chamber.
A vacuum circuit breaker comprises a vacuum interrupter operable between a closed state and an open state, and an actuator. The actuator comprises a piezoelectric driving element that is expandable and contractable along an expansion axis in response to an electrical input signal. The actuator further comprises a mechanical amplifying structure extendable along an actuation axis and being mechanically coupled to the piezoelectric driver such that expansion or contraction of said piezoelectric driving element causes the amplifying structure to extend or retract along the actuation axis. The mechanical amplifying structure is coupled to the vacuum interrupter for operating the vacuum interrupter between said closed and open states.
H01H 1/02 - Contacts characterised by the material thereof
H01H 1/50 - Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
H01H 3/22 - Power arrangements internal to the switch for operating the driving mechanism
H01H 33/28 - Power arrangements internal to the switch for operating the driving mechanism
H01H 33/664 - ContactsArc-extinguishing means, e.g. arcing rings
A method of testing a current limiting device connected between first and second portions of an electrical conductor. The method comprises generating vibrations in a target frequency band; applying the vibrations to the first portion of the electrical conductor; detecting vibrations in the second portion of the electrical conductor corresponding to the vibrations applied to the first portion in the target frequency band; determining a time at which vibrations arrive in an environment adjacent the second portion of the electrical conductor corresponding to the vibrations applied to the first portion in the target frequency band; comparing a time at which the vibrations in the second portion are detected with the time at which the vibrations arrive in said environment; and determining that the current limiting device is intact if the vibrations in the second portion are detected before the vibrations are determined to arrive in the environment.
A method of identifying partial discharge events in a multi-phase electrical supply. The method comprises measuring characteristics of each phase of the electrical supply in respect of a common measurement period; comparing the respect characteristics across the phases; and determining from the comparison if the respective characteristics are indicative of a partial discharge event or of the presence of electrical noise. The method allows automatic rejection of noise,and identification of phase to ground and phase to phase partial discharge. The comparison of characteristics may be performed using ternary diagrams, which facilitates performance of the method by unskilled persons.
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