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Circuit Breaker & AutomaticTransfer Switch

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For mini circuit breakers, 1P + N, 1P, 2P are generally used as single-phase electrical appliances on-off control, but the effect is different.
1P ------ single pole circuit breaker, with thermal magnetic trip function, only control the fire line (phase line), modulus 18mm;
1P + N ---- unipolar + N circuit breaker, while controlling the line of fire, zero line, but only the FireWire with thermal magnetic trip function; modulus of the same 18mm;
2P ------ single-phase 2-pole circuit breaker, while controlling FireWire, zero line, and have a thermal magnetic trip function, modulus 2 * 18mm = 36mm 



For circuit breakers, 1P + N, 1P, 2P are generally used as single-phase electrical appliances on-off control, but the effect is different.
1P ------ single pole circuit breaker, with thermal magnetic trip function, only control the fire line (phase line), modulus 18mm;
1P + N ---- unipolar + N circuit breaker, while controlling the line of fire, zero line, but only the FireWire with thermal magnetic trip function; modulus of the same 18mm;
2P ------ single-phase 2-pole circuit breaker, while controlling FireWire, zero line, and have a thermal magnetic trip function, modulus 2 * 18mm = 36mm. 