Abstract: The present invention provides a temperature protective device for a filter capacitor bank. The capacitor bank comprises two or more capacitors which are arranged in an array manner. The temperature protective device comprises a temperature measurement device which comprises: a cover body covering the capacitor bank; a single temperature sensor fixed at a center area of the cover body, which is used for measuring a temperature value of the capacitor bank; and a heat conduction pad located between the cover body and the capacitor bank, wherein the heat conduction pad and the cover body have fitted shapes. The temperature protective device of the present invention saves cost and can accurately realize temperature protection of the capacitor bank.

Abstract: The present invention provides a temperature protective device for a filter capacitor bank. The capacitor bank comprises two or more capacitors which are arranged in an array manner. The temperature protective device comprises a temperature measurement device which comprises: a cover body covering the capacitor bank; a single temperature sensor fixed at a center area of the cover body, which is used for measuring a temperature value of the capacitor bank; and a heat conduction pad located between the cover body and the capacitor bank, wherein the heat conduction pad and the cover body have fitted shapes. The temperature protective device of the present invention saves cost and can accurately realize temperature protection of the capacitor bank.

Abstract: A circuit breaker includes a set of separable contacts moveable between a closed position and an open position, an operating mechanism configured to open the set of contacts, a conductor coupled to the set of contacts, a current transformer coupled to the conductor, and a trip circuit coupled to the operating mechanism and to the current transformer and configured to cause the operating mechanism to open the set of contacts when a current through the conductor exceeds a current threshold that is greater than a saturation threshold of the current transformer. The trip circuit is further configured to vary the current threshold during an interval following a closure of the set of the contacts and to provide a fixed current threshold thereafter.

Abstract: A circuit breaker includes a set of separable contacts moveable between a closed position and an open position, an operating mechanism configured to open the set of contacts, a conductor coupled to the set of contacts, a current transformer coupled to the conductor, and a trip circuit coupled to the operating mechanism and to the current transformer and configured to cause the operating mechanism to open the set of contacts when a current through the conductor exceeds a current threshold that is greater than a saturation threshold of the current transformer. The trip circuit is further configured to vary the current threshold during an interval following a closure of the set of the contacts and to provide a fixed current threshold thereafter.