Because summer charges are different in winter, the voltage level is slightly different. In order to meet the demand of voltage, some rural electricians in the absence of relevant tests, unauthorized adjustment of switch distribution, switch distribution is not sufficient, mutual short circuit, incineration distribution S11-50kVA /10KV/ 0.4kV oil-immersed transformer.
In order to prevent natural disasters and external damage, set up high and low voltage insulation cover in narrow roads and forest protection areas, to prevent distribution S11-50kVA /10KV/ 0.4kV oil-immersed transformer low voltage short circuit burning loss S11-50kVA /10KV/ 0.4kV oil-immersed transformer. Power distribution S11-50kVA /10KV/ 0.4kV oil-immersed transformer is high, and a lightning arrester is set on the low-voltage side. A lightning arrester is set on the high and low voltage side of the oil-immersed transformer s11-50kVA /10KV/ 0.4kV in the multi-mine area distribution. If the quality of the lightning arrester is not qualified or can not be replaced in time, S11-50kVA /10KV/ 0.4kV oil-immersed transformer is easy to be damaged by lightning. Every year in the thunderstorm season, the lightning arrester should be sent to the maintenance test department for test and installation. It is forbidden to use unqualified products.
Regularly measure the grounding resistance of distribution S11-50kVA /10KV/ 0.4kV oil-immersed transformer. After long-term operation (especially when the grounding wire is replaced by aluminum wire), the oxidation of distribution S11-50kVA /10KV/ 0.4kV oil-immersed transformer increases, and the grounding resistance increases, which is combined with the corrosion and damage of ground filling, resulting in the deviation of neutral point potential. Once there is a lightning strike or overvoltage, accidents are easy to happen. According to the regulations, the grounding device should meet the following requirements. 100kV> A below distribution S11-50kVA /10KV/ 0.4kV oil-immersed transformer grounding resistance in 10 ω below, 100kV> Above A distribution S11-50kVA /10KV/ 0.4kV oil-immersed transformer grounding resistance is less than 4 ω.
Post time: Oct-13-2021
