Product overview:
CZM18 series miniature circuit breaker is applicable to AC 50Hz lines with rated voltage of 230V/400V and rated current of 63A. It is mainly used for overload and short circuit protection of lighting, distribution lines and equipment of office buildings, residential buildings and similar buildings, and also for infrequent switching of lines under normal conditions. The circuit breaker has beautiful appearance, advanced structure, reliable performance, high breaking capacity (10kA), short flashover and other characteristics; It is an ideal product for industrial, commercial, high-rise and civil residential customers.
Product model description
| ① | Enterprise code |
| ② | Miniature circuit breaker |
| ③ | Design No. |
| ④ | Rated current of frame size |
| ⑤ | Rated Current（1A~100A) |
| ⑥ | Number of poles (1,1N, 2,3,3N, 4) |
| ⑦ | Tripping characteristics (B,C,D) |
Technical parameter
Number of poles: 1P, 1P+N, 2P, 3P, 3P+N, 4P
Rated voltage: 230/400V
Rated frequency: 50/60Hz
Rated short-circuit breaking capacity: 10kA
Electrical life: 63A and below when Un, In and COS=0.90: 8000 cycles; 80A~100A: 1500 cycles (each cycle includes one on operation and one off operation)
Mechanical life: 63A and below: 20000 cycles; 80A~100A: 10000 cycles
Withstand voltage: power frequency withstand voltage 2000V (1min), impulse withstand voltage 6000V (1.2/50µs)
Impact resistance: it can withstand 10ms, 20g impact for at least 18 times; At least 18 times of 5ms and 40g impact; Vibration resistance: it can withstand 3g at 10~55Hz for at least 30 minutes.
Storage temperature: -55℃~+55℃ according to Section I of Part II of IEC88 (lasting for 96 hours)
Working environment temperature: -5℃~+40℃
Protection grade: IP40 (after installation)
Wiring capacity: 63A and below: flexible wire 25mm2 and below, hard wire 35mm2 and below;
80A~100A: flexible wire 35mm2 and below, hard wire 50mm2 and below.
DC application: 1A~63A; rated short-circuit breaking capacity: 6kA; Maximum voltage: single pole 60V;
Double pole series connection 110V; 80A~125A: rated short-circuit breaking capacity: 10kA;
Maximum voltage: double pole series 125V; Four pole series connection 250V; The instantaneous tripping current is about 40% higher than that used for AC 50/60Hz.
Outline and installation dimension drawing
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