CHINT MCB NXB-63 1P 1A 2A 3A 4A 16A 32A 63A Miniature Circuit Breaker AC 230V DIN Rail Mounting Miniature Household Air Switch

1. Compliant standards

IEC60898-1

2. Major function

Overload protection, short circuit protection, positive isolation

3. Technical parameters

Rated current: 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A; Rated voltage: 230V (1P, 1P+N), 230/400V (2 ~ 4P, 3P+N); Frequency: 50; Electromagnetic release type: C Number of poles: 1P, 1P+N, 2P, 3P, 3P+N, 4P; Mechanical life: 20000 cycles; Electrical life: 10000 cycles; Rated short-circuit breaking capacity(Icn): 6000A; Short-circuit breaking capacity (Ics): 6000A; Rated impulse withstand voltage (Uimp): 4kV; Power consumption on each pole of the circuit breaker: see Table 1.

4. Dimensions and installation sizes

Strong adaptability to environment and reliable operation in harsh environment

-30℃~70℃ ambient temperature range, to meet the needs of various applications

Contact indicator window, clear position

All models of contact head position visualization, avoid wrong operation, use more reliable

Circuit breaker and leakage protection choose

1.The main switch of the household distribution box is usually a 32A-63A mini circuit breaker or leakage protection circuit breaker which can disconnect the phase line and neutral line at the same time 2.10A-16A miniature circuit breaker is generally selected for lighting circuit 3.Socket circuit generally selects 16A-20A leakage protection circuit breaker

Switch current is selected according to equipment power

1.Calculation formula = power/voltage *3 (impact current) 2.For example: 3000W equipment 380V voltage select circuit breaker, 3000W*3 (impulse current) /380V≈ 23.68A ≈25A, we choose 25A circuit breaker or leakage circuit breaker

How to choose the type C and type D electromagnetic trip

The long delay action range of type C is 5in-10in; The long delay action range of type D is 10in-12in.(In is the rated current of the switch) Type C is used in light load areas such as distribution control and lighting.Type D can be used in heavy load starting places, such as motor starting, can avoid the equipment after starting the instantaneous current is too large to cause unnecessary overload switch trip.

Can’t shut down

1.Whether the load port is short circuited 2.Operating mechanism failure 3.The rated current of the circuit breaker does not match the load current

High temperature

1.The wiring screw is loose without tightening the wire 2.The chosen wire section area is too small, the wire is too thin

Not disconnected in short circuit

1.The selected circuit breaker does not match the working conditions of the load

No electricity

1.Too little lead head stripping 2.The wiring screw is loose without tightening the wire