1、配電柜常見(jiàn)的燒損故障
1. Common burning failure of distribution cabinet
母線鋁觸頭燒損、配電柜并聯(lián)漏電斷路器或開(kāi)路燒損、配電柜下端RTO熔絲燃燒損失、配電柜低壓儀表、出風(fēng)口或避雷器燒壞、配電柜設(shè)備接觸螺釘擰緊不牢固發(fā)熱排出、配電柜內(nèi)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、管理原因燒損
2. Management cause burning
因?yàn)橹g的短路線路在接收端,漏電保護(hù)或怠速運(yùn)轉(zhuǎn)電流超過(guò)額定電流使保護(hù)或閑置或空鉛和終端點(diǎn)燃，燃燒的配電箱。
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.
出線配電室是四級(jí)線與T低壓出口鋼管,標(biāo)準(zhǔn)的u型防水彎不了,導(dǎo)致雨水倒漏電保護(hù)器，當(dāng)負(fù)荷過(guò)大或過(guò)流時(shí)，加熱器會(huì)被加熱，造成著火燒損。
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.
雷暴天氣時(shí)，農(nóng)村配電室配電柜低壓避雷器因雷擊電流過(guò)大發(fā)生故障，導(dǎo)致避雷器引燃，導(dǎo)致配電柜儀表引線著火，損壞配電柜。并且接地線不合格或者沒(méi)有，檢察人員也有沒(méi)檢查到，導(dǎo)致雷電天氣引發(fā)燒損，這是主要的原因之一。
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、技術(shù)原因燒損
3. Burning loss due to technical reasons
配電柜容量不合理過(guò)小，導(dǎo)致配電設(shè)備過(guò)載、過(guò)載時(shí)電氣設(shè)備燃燒。配電柜防雷設(shè)施不完善。，簡(jiǎn)單的配電柜沒(méi)有配備低壓避雷器。二是配電柜未按照低壓電網(wǎng)技術(shù)規(guī)范可靠接地。
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.
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