LS Miniature circuit breaker BK63N 1P B1A

Introduction: LS generation circuit breaker BK63N 1P B1A can be switched on, carry and break the current under normal circuit conditions, can also be switched on under the specified abnormal circuit conditions, carry a certain time and break the current of a mechanical switching appliance.

Product characteristics

1. Specify the desired welding current. The welding current required is primarily recognized according to welding data and welding process. Robot control indicates the normal welding current range.

In civil building planning, low-voltage circuit breaker is mainly used for line overload, short circuit, overcurrent, voltage loss, undervoltage, grounding, leakage, dual power automatic switching and motor infrequent start maintenance, operation and other purposes, the selection criteria in addition to comply with the use of low-voltage electrical equipment environmental characteristics and other basic criteria (see industrial and civil power distribution planning manual) should also consider the following conditions:

1) BK63N 1P B1A Product model The extra voltage of small circuit breaker should not be less than the extra voltage of the line;

2) BK63N 1P B1A Product model The extra current of the circuit breaker and the extra current of the overcurrent release device is not less than the calculation current of the line;

3) BK63N 1P B1A Product model the additional short circuit breaking of small circuit breaker can not be less than the maximum short circuit current in the line;

4) BK63N 1P B1A Product model selection type distribution circuit breaker needs to consider short delay short circuit on and off to cooperate with delay maintenance level;

5) BK63N 1P B1A Product model Micro circuit breaker undervoltage release Extra voltage is equal to the line extra voltage;

6) BK63N 1P B1A When used for motor maintenance, the selection of circuit breakers should take into account the starting current of the motor and make it not operate within the starting time; See "Industrial and Civil Power Distribution Planning Manual" for planning accounting;

7) Circuit breaker selection should also consider the selection of circuit breaker and circuit breaker, circuit breaker and fuse cooperation.

Planning point

(1) The cooperation between the circuit breaker and the circuit breaker should consider the instantaneous release value of the upper circuit breaker, which should be greater than the maximum expected short circuit current at the lower circuit breaker outlet, if the circuit element impedance value is different when the circuit breaker is short circuited at the two-stage circuit breaker, so that the short circuit current value is not different, the upper circuit breaker can select the release device with short delay.

(2) When the short-circuit circuit breaker is greater than or equal to the setting value of its instantaneous release device, it will be released within a few milliseconds, so the lower maintenance electrical equipment should not use the circuit breaker to complete the selective maintenance requirements.

(3) A circuit breaker with a short delay, when its time limit is set at the maximum delay, its on-off can decline, therefore, in the selective maintenance loop, consider the selection of the circuit breaker short delay on-off should meet the requirements.

(4) It should also be considered that the short-circuit delay returnable characteristics of the upper circuit breaker and the operating characteristics of the lower circuit breaker time curve should not intersect, and the short delay characteristic curve and the instantaneous characteristic curve should not intersect.

(5) When the circuit breaker and the fuse are used in cooperation, the cooperation between the upper and lower levels should be considered, and the ampere-second characteristic curve of the circuit breaker should be compared with the ampere-second characteristic curve of the fuse, so that in the case of short circuit current, it has maintenance selectivity.

(6) When the circuit breaker is used for the maintenance of the distribution line, it is appropriate to choose a circuit breaker with a long delay action overcurrent trip, when the end of the line produces a single-phase grounding short circuit, the short circuit current is not less than 1.5 times the setting current of the circuit breaker instantaneous or short delay overcurrent trip.