Function and use
The rated insulation voltage of the NM2 series plastic case circuit breaker (hereinafter referred to as the circuit breaker) is 1000V. It is suitable for low-voltage distribution grids with AC 50Hz, rated operating voltage 400V, and rated current 100A~800A. It can be used to distribute electric energy and protect lines and power supply equipment from overload, overvoltage, undervoltage, short circuit, phase loss and other faults. The product uses an electronic release and is equipped with communication functions, and is widely used in electric power and other industries.
Detailed parameters
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| Parameter classification | Parameter item | Parameter value |
|---|
| Specifications and models | NM2-250 |
| | NM2-400 |
| | NM2-630 |
| | NM2-800 |
| | Frame current Ihm(A) | 250 |
| | 400 |
| | 630 |
| | 800 |
| Number of poles | 3P |
| Rated current In(A) | 100-125-140-160-180-200-225-250, adjustable |
| | 160-180-200-225-250-280-315-350-375-400, adjustable |
| 250-280-315-350-375-400-450-500-560-630, adjustable |
| | 315 -350-400-450-500-560-630-700-760-800, adjustable |
| Rated insulation voltage Ui (V) | 1000 |
| Rated impulse withstand voltage Uimp(kV) | 8 |
| Rated operating voltage Ue(V) | AC400,50Hz |
| Release type | Electronic (three-stage protection, electronically adjustable) |
| Rated ultimate short-circuit breaking capacity Icu(kA) | 50 |
| Rated operating short-circuit breaking capacity Ics(kA) | 35 |
| Rated short-time withstand current Icw, 1s (kA) | 3kA/0.5s |
| |
| | 8 |
| | 10 |
| Use categories | A |
| | B |
| < /td> | B |
| | B |
| Overvoltage protection value (V) | setting value (250~300)±5% |
| Undervoltage protection value (V) | Setting value (145~200)±5% |
| Joint control delay time (ms) | ≤ 40 |
| Communication delay time (ms) | ≤ 10 00 |
| | 500 |
| Not powered | 7000 |
| | 7000 |
| | 4000 |
| | 2500 |
| Total times | 8000 |
| 8000 |
| | 5000 |
| | 3000 |
