Double Pole 40 Amp Ac Mcb

https://youtu.be/oHB6RjLBMo4

China Factory ICHYTI Wholesale double pole 40 amp ac mcb In Stock is a mechanical switching device that can carry and break the current in a circuit under normal conditions, and can also carry and break the current for a certain period of time under abnormal conditions to protect circuit equipment from damage.

ICHYTI double pole 40 amp ac mcb Parameter (Specification)

ICHYTI double pole 40 amp ac mcb Selection

◉ The rated voltage of the circuit breaker cannot be lower than the rated voltage of the circuit;

◉ The rated current of the circuit breaker and the rated current of the overload protector should not be less than the calculated current of the line;

◉ The rated short-circuit breaking capacity of the circuit breaker should not be less than the maximum short-circuit current in the line;

◉ When selecting a type of distribution circuit breaker, it is necessary to consider the matching of its short-term short-circuit breaking capacity and delay protection level;

◉ The rated voltage of the undervoltage protector of the circuit breaker should be the same as the rated voltage of the line;

◉ When selecting a circuit breaker for motor protection, it is necessary to consider the starting current of the motor to ensure that the circuit breaker will not be triggered during the starting time;

◉ Interoperability with other circuit breakers or fuses shall also be considered when selecting circuit breakers.

ICHYTI double pole 40 amp ac mcb Details

ICHYTI double pole 40 amp ac mcb Dimensions and wiring

ICHYTI double pole 40 amp ac mcb Design points

1. When selecting a circuit breaker, consideration should be given to the instantaneous release action value of the superior circuit breaker to ensure that it is greater than the maximum expected short-circuit current at the outlet of the subordinate circuit breaker. If there is a small difference in the impedance value of the circuit components during a short circuit at the two stage circuit breaker, resulting in a small difference in the short-circuit current value, the superior circuit breaker with a short delay release can be selected.

2. The current limiting circuit breaker will trip within a few milliseconds, when the short-circuit current is greater than or equal to its instantaneous trip setting value. Therefore, circuit breakers in lower level protective appliances cannot be used to achieve selective protection requirements.