1、配电柜常见的烧损故障

1. Common burning failure of distribution cabinet

母线铝触头烧损、配电柜并联漏电断路器或开路烧损、配电柜下端RTO熔丝燃烧损失、配电柜低压仪表、出风口或避雷器烧坏、配电柜设备接触螺钉拧紧不牢固发热排出、配电柜内部短路。

Burning loss of aluminum contact of bus, parallel leakage circuit breaker or open circuit of distribution cabinet, burning loss of RTO fuse at the lower end of distribution cabinet, burning loss of low-voltage instrument, air outlet or arrester of distribution cabinet, loose tightening of contact screw of equipment of distribution cabinet, heat discharge, internal short circuit of distribution cabinet.

2、管理原因烧损

2. Management cause burning

因为之间的短路线路在接收端,漏电保护或怠速运转电流超过额定电流使保护或闲置或空铅和终端点燃，燃烧的配电箱。

Because of the short circuit between the lines at the receiving end, leakage protection or idle running current exceeds the rated current, making the protection or idle or empty lead and the terminal ignite, burning the distribution box.

出线配电室是四级线与T低压出口钢管,标准的u型防水弯不了,导致雨水倒漏电保护器，当负荷过大或过流时，加热器会被加热，造成着火烧损。

The outgoing line distribution room is a class IV line and t low-voltage outlet steel pipe. The standard U-shaped waterproof can not be bent, which leads to rainwater leakage protector. When the load is too large or the current is too high, the heater will be heated, causing fire damage.

雷暴天气时，农村配电室配电柜低压避雷器因雷击电流过大发生故障，导致避雷器引燃，导致配电柜仪表引线着火，损坏配电柜。并且接地线不合格或者没有，检察人员也有没检查到，导致雷电天气引发烧损，这是主要的原因之一。

In thunderstorm weather, the low-voltage arrester of the distribution cabinet in rural distribution room fails due to excessive lightning current, which leads to the ignition of the arrester, the ignition of the instrument lead of the distribution cabinet and the damage of the distribution cabinet. And the ground wire is not qualified or not, prosecutors have not checked, leading to lightning weather caused by burning, which is one of the main reasons.

3、技术原因烧损

3. Burning loss due to technical reasons

配电柜容量不合理过小，导致配电设备过载、过载时电气设备燃烧。配电柜防雷设施不完善。首先，简单的配电柜没有配备低压避雷器。二是配电柜未按照低压电网技术规范安全可靠接地。

The unreasonable capacity of distribution cabinet is too small, which leads to the overload of distribution equipment and the combustion of electrical equipment when it is overloaded. The lightning protection facilities of distribution cabinet are not perfect. First of all, the simple distribution cabinet is not equipped with low-voltage arrester. Second, the distribution cabinet is not grounded safely and reliably according to the technical specification of low voltage power grid.