Regularly clean the dirt on the distribution transformer, check whether the bushing has flashover discharge, whether the grounding is good, whether there is disconnection, desoldering, or breakage. Regularly shake the grounding resistance, which should not exceed 4 Ω (capacity of 100 kV · A and above) or 10 Ω (capacity of less than 100 kV · A), or take anti fouling measures and install anti fouling caps on the bushing. When connecting or disconnecting the outgoing lines of distribution transformers, it is necessary to strictly follow the process operation to avoid internal breakage of the outgoing lines.
