福建干式变压器：漏电保护装置工作原理

漏电保护装置工作原理 　　
1.漏电保护装里的作用
在中性点接地的电网中，为了防止漏电而引起的人身触电事故、火灾事故和电器设备损坏事故.以及监视或切除一相接地故障，可采用由漏电继电器、低压福建干式变压器或接触器组成的漏电保护装置。

2.漏电保护装置的原理
漏电保护装置的原理，是使用零序电流互感器来感应漏电信息。当漏电电流达到整定值时，能自动断开电路。正常时，三相电流的磁场互相抵消.零序电流互感器二次侧没有电流。当有人站在地面上发生单相触电事故或某一相导线绝缘严重降低或电器设备金属外壳带电等情况发生时，零序电流互感器二次侧就有电流输出，漏电保护装置通过检测元件经过中间机构的放大转换和传递，使保护装置动作，切除电源，起到保护作用。

Leakage protection device works

The role of the 1. Leakage protection equipment
Neutral grounding grid in order to prevent leakage of personal electric shock, fire accidents and electrical equipment damage accidents as well as surveillance or the removal of a phase to ground fault, can be used by leakage relays, low-voltage circuit breaker or contactor leakage protection device.

(2) the principle of leakage protection device
Leakage protection device principles, is the use of zero-sequence current transformer to sense the leakage of information. When the leakage current reaches the setting value, automatically disconnect the circuit. Normal three-phase current, magnetic fields cancel each other out no current zero-sequence current transformer secondary side. Occur when someone standing on the ground on the occurrence of single-phase electric shock or a phase conductor insulation severely red地 址：山东聊城经济开发区华山路南首30号uced or electrical equipment, metal shell charged, there is current output of the zero-sequence current transformer secondary side leakage protection device by detecting components after intermediaries zoom convers联系人：陈经理ion and transmission of the protective device operates, the removal of power, play a protective role.

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