Dead Tank Circuit Breaker With Surge Arrester Connected Across The Bushing Tops Of Each Pole

摘要

Surge arrester structure is provided for a dead tank circuit breaker. The circuit breaker has a pole assembly with a first electrical terminal in a first bushing, and a second electrical terminal in a second bushing. The first terminal is electrically connected to a stationary contact and the second terminal is electrically connected to a movable contact. The surge arrester structure includes a surge arrester having first and second opposing ends. A first conductor structure electrically and mechanically connects the first end of the surge arrester with an end of the first terminal. A second conductor structure electrically and mechanically connects the second end of the surge arrester with an end of the second terminal. The surge arrester is electrically connected parallel with respect to the stationary and movable contacts so that the surge arrester can limit transient over voltages occurring across the contacts when the contacts are open.

主权项

1. Surge arrester structure for a dead tank circuit breaker, the circuit breaker having at least one pole assembly with a first electrical terminal carried in a first bushing, and a second electrical terminal carried in a second bushing, the first electrical terminal being electrically connected to a stationary contact which is immovably secured within the pole assembly and the second electrical terminal being electrically connected to a movable contact that is slidable within the pole assembly, the surge arrester structure comprising:
a surge arrester having first and second opposing ends, and a first conductor structure constructed and arranged to electrically and mechanically connect the first end of the surge arrester with an end of the first electrical terminal, and second conductor structure constructed and arranged to electrically and mechanically connect the second end of the surge arrester with an end of the second electrical terminal, wherein the surge arrester is electrically connected parallel with respect to the stationary and movable contacts so that the surge arrester can limit transient over-voltages occurring across the contacts when the contacts are open.