Method of and apparatus for synthetic testing of a multi-break c

Details Method of and apparatus for synthetic testing of a multi-break c Method of and apparatus for synthetic testing of a multi-break c

1982-07-06

1984-06-12

Tokar, Michael J.

Electricity: measuring and testing

Electromechanical switching device

Circuit breaker

324415, G01R 3102

Patent

active

044544766

ABSTRACT:
In a method of and apparatus for synthetic testing of a multi-break circuit breaker having a metallic tank and a series connection of interrupter units, and a non-grounded and a grounded lead conductors connected to the first and the second ends of the series connection, a short-circuit current is made to flow through the series connection, the circuit breaker is then operated, and upon completion of the interruption of the current, a first transient recovery voltage is supplied to the non-grounded lead conductor and is applied, in effect, across a first one of the interrupter units at the second end or across a train of interrupter units including said first one of the interrupter unit, and, simultaneously, a second transient recovery voltage is supplied to the tank, the first and the second transient recovery voltages having the same polarity and the second transient recovery voltage having substantially the same magnitude as the whole transient recovery voltage to be applied across all the interrupter units of the circuit breaker.

REFERENCES:
patent: 3038116 (1962-06-01), Einsele
patent: 4147975 (1979-04-01), Pratsch et al.
patent: 4326167 (1982-04-01), Fehr

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