Because the charge is different in winter and summer, the voltage level is slightly different. In order to meet the demand of voltage, some rural electricians adjust the distribution of switches without relevant tests, and the distribution of switches is insufficient, short circuits each other, and incinerates the distribution S11-50KVA/10KV/0.4KV oil-immersed transformer.

In order to prevent natural disasters and external damage, high and low voltage insulating covers are set up in narrow roads and forest protection areas to prevent the low-voltage short-circuit S11-50KVA/10KV/0.4KV oil-immersed transformers from falling and burning S11-50KVA/10KV/0.4KV oil-immersed transformers. The distribution S11-50KVA/10KV/0.4KV oil-immersed transformer is high, and a lightning arrester is provided on the low-voltage side. A lightning arrester is set on the high and low voltage side of the S11-50KVA/10KV/0.4KV oil-immersed transformer in the multi-mine area distribution. If the quality of the arrester is unqualified or cannot be replaced in time, the S11-50KVA/10KV/0.4KV oil-immersed transformer is easy to be damaged by lightning. In the thunderstorm season every year, the arrester should be sent to the maintenance and test department for test installation in time. It is forbidden to use non-conforming products.

Regularly measure the grounding resistance of the 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 the distribution S11-50KVA/10KV/0.4KV oil-immersed transformer is intensified, and the grounding resistance increases, which is combined with the corrosion and damage of the ground-filling grounding, resulting in the offset of the neutral point potential. Once there is a lightning strike or overvoltage, it is prone to accidents. According to the regulations, the grounding device should meet the following requirements. The grounding resistance of the distribution S11-50KVA/10KV/0.4KV oil-immersed transformer below 100kV>A is below 10Ω, and the grounding resistance of the distribution S11-50KVA/10KV/0.4KV oil-immersed transformer above 100kV>A is less than 4Ω.