scope:

This standard applies to all types of electrically controlled ac high-voltage circuit breakers rated above 1000 V. This standard applies for any type of power-operated mechanism and for both ac and dc control power. Only the basic control elements of the circuit breaker, including reclosing where required, are included in this standard. This standard does not include devices or circuits for protective relaying, special interlocking, etc., since these are dependent upon the specific application of a particular circuit breaker.