Most neutral of110KV/220KV power networks are not grounded. In such systems, the neutral iseasy to get overvoltage if struck by lightning or short-circuited bysingle-phase grounding fault. Besides, most transformers are uniform insulated.This will greatly threaten insulation of neutral point. Therefore, we useMRD-NP Transformer Discharging Gap to protect neutral of transformer so as toprevent accidents from happening.