Nader Circuit Breaker

The rated operating sequence of high-voltage circuit breakers is generally marked as O-0.3s-CO-180s-CO, or CO-15s CO. O represents an opening operation, and CO represents an opening operation immediately after a closing operation. 0.3s is the no-current interval time of the circuit breaker when the a...

The opening time of a high-voltage circuit breaker refers to the total time that the circuit breaker needs from receiving a trip command (that is, the tripping coil is applied with voltage) to the time the circuit breaker is opened until the three-phase arc is completely extinguished, called the full...

The rated peak withstand current (dynamic stability) of a high-voltage circuit breaker refers to the first half-wave current peak value of the rated short-term withstand current that the circuit breaker can carry under the specified use and performance conditions at the closing position. The duration...

The rated short-time withstand (thermally stable) current of a high-voltage circuit breaker refers to the effective value of the current that the circuit breaker can withstand when the circuit breaker is in the closed position during the rated short-circuit duration under the specified use and perfor...

The effect of current carrying capacity is mainly reflected in the Joule heat generated when the current flows through the conductor loop. Part of this heat is transferred to the outside world through heat conduction, heat convection and heat radiation, and dissipated into the surrounding medium, whi...