Measure the synchronism and coordination time of the opening and closing of the three-phase main and auxiliary contacts of the circuit breaker and the same-phase fractures, and shall meet the requirements of the product technical conditions.
Measuring the contemporaneousity and cooperation time of the circuit breaker master, auxiliary contact three-phase and the same-phase break-off and close gate shall meet the requirements of the technical conditions of the product.
Measure the synchronism and coordination time of opening and closing of three-phase and in-phase fractures of main and auxiliary contacts of circuit breaker, which shall meet the requirements of product technical conditions.<br>