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.