Measuring the opening and closing time of the circuit breaker should be carried out under the rated operating voltage, air pressure or hydraulic pressure of the circuit breaker;
Measuring the time of dividing and closeing circuit breakers shall be carried out under the rated operating voltage, air pressure or hydraulic pressure of circuit breakers;
The opening and closing time of the circuit breaker shall be measured under the rated operating voltage, air pressure or hydraulic pressure of the circuit breaker;