Double Pole 40 Amp Ac Mcb

CNKA double pole 40 amp ac mcb Introduction

China Factory CNKA (company brand) offers wholesale double pole 40 amp AC MCBs in stock. This mechanical switching device is designed to carry and interrupt current under normal operating conditions and can also handle and interrupt current for a specified period during abnormal conditions. Its primary function is to protect circuit equipment from potential damage.

CNKA double pole 40 amp ac mcb Parameter (Specification)

CNKA double pole 40 amp ac mcb Selection

1  The rated voltage of the circuit breaker must be at least equal to the rated voltage of the circuit.

2  The rated current of the circuit breaker and the overload protector should be no less than the calculated current for the line.

3  The circuit breaker's rated short-circuit breaking capacity must be greater than or equal to the maximum possible short-circuit current in the line.

4  When choosing a distribution circuit breaker, ensure it matches the required short-circuit breaking capacity and delay protection level.

5  The rated voltage of the undervoltage protector should match the rated voltage of the line.

6  For motor protection, the circuit breaker should accommodate the motor’s starting current to prevent false tripping during start-up.

7  Consider compatibility with other circuit breakers or fuses when selecting a circuit breaker.

CNKA double pole 40 amp ac mcb Details

CNKA double pole 40 amp ac mcb Dimensions and wiring

CNKA double pole 40 amp ac mcb Design points

1 When selecting a circuit breaker, ensure that the instantaneous release action value of the upstream circuit breaker is greater than the maximum expected short-circuit current at the downstream circuit breaker’s outlet. If there is minimal impedance difference between circuit components during a short circuit, leading to a small variation in short-circuit current, an upstream circuit breaker with a short delay release can be chosen.

2  Current-limiting circuit breakers will trip within a few milliseconds if the short-circuit current meets or exceeds their instantaneous trip setting. As a result, lower-level protective circuit breakers cannot be used to meet selective protection requirements.