The principle and structure of the resonance-proof three phase voltage transformer used in the neutral insulation system are discussed. The connection errors brought about in operation are presented.
论述了中性点绝缘系统中采用的三相防谐振电压互感器的原理与结构，并指出了运行中容易发生的接线错误。
2
With the increasing capacity of distribution network and new large-scale use of electrical equipment, a suitable neutral grounding more and more important for the safe operation of the power grid.