塑壳断路器怎样避免和接触器发生线头故障？这个问题值得大家来了解一番，下面来讲讲吧。

　　How can molded case circuit breaker avoid wire head failure with contactor? This problem is worth understanding, let's talk about it.

　　塑壳断路器是能够在电流超过跳脱设定后自动切断电流的一种电气设备。塑壳指的是使用塑料绝缘体来作为设备的外壳，来隔离导体之间以及接地金属的部分。塑壳断路器会含有热磁跳脱单元，大型号的断路器会配备固态跳脱传感器。常用的断路器额定电流有以下几种:60、75、80/100/126/160/200A等等。

　　Molded case circuit breaker is a kind of electrical equipment which can cut off the current automatically when the current exceeds tripping setting. Molded case refers to the use of plastic insulation as the outer shell of the device to separate conductors from each other and to ground metal parts. Molded circuit breakers may contain thermal-magnetic trip units, and larger ones may be equipped with solid state trip sensors. The common rated current of circuit breakers are as follows :60, 75, 80/100/126/160/200A, etc.

　　在使用断路器时，经常会遇到接触器和断路器线接好了却不通电，在没有测试的情况下拿去用，就会导致电路出现故障。很多人都怀疑这样的原因是产品出了问题，其实是因为我们在接线的方式上出了问题，导致产品缺相或产生了相间短路的情况。下面跟大家介绍一下正确的接线方式。

　　In the use of circuit breakers, often encounter contactor and circuit breaker wire is connected but not energized, in the absence of testing to use, will lead to circuit failure. Many people suspect that the reason is that there is something wrong with the product. In fact, it is because there is something wrong with the way of wiring, which leads to phase deficiency or short circuit between phases. Here is to introduce the correct way of wiring.

　　引线。ABB塑壳断路器代理认为要避免这样的情况发生，首先，我们在接线前要选择合适的引线，最好使用单股铜线，如果没有，使用多股软铜线，用锡将线头焊接在一起，形成单股线。这样做的目的就是防止多股铜线漏出产生短路状况。

　　Lead. ABB plastic case circuit breaker agent that to avoid such a situation, first of all, we should choose the right lead before wiring, the best use of a single copper wire, if not, the use of multiple soft copper wire, tin will be welded together to form a single wire. The purpose of this is to prevent the leakage of multiple strands of copper wire short circuit.

　　接线方式。接线方式都采用线框方式接线，这样做的好处是先不会像用1字型接线方式那样会产生内部触头发生侧滑，如果直接压在接线框的旁边，在拧紧螺丝的时候就容易造成静触点位移，导致断路器接触不良。

　　Connection mode. Wiring mode are wire frame wiring, the advantage of doing so is not like using 1 type wiring mode will produce internal contact side slip, if the direct pressure next to the wiring frame, when tightening the screw is easy to cause static contact displacement, resulting in poor contact of the circuit breaker.

　　螺丝选择。接触器采用螺丝帽压片压线，做成这样的原因是当螺丝往下拧的时候压片就会向下压紧引线，也会让产品在接线的时候有一个平衡点，接线也不会出现压不紧的情况，降低了故障率。

　　Screw selection. The contactor uses screw cap pressing plate to press the line. The reason for this is that when the screw is twisted down, the pressing plate will press the lead downward. It will also make the product have a balance point when wiring, and the wiring will not be pressed tight, reducing the failure rate.

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