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1、压变的铁磁谐振产生的过电压常使设备内绝缘击穿、外绝缘放电，且常因事故处理不及时或事故扩大而造成大面积停电

1, the overvoltage caused by the ferromagnetic resonance caused by the pressure changes the insulation breakdown and the external insulation discharge in the equipment, and often causes the large area power failure because of the accident processing is not timely or the accident expands

2、电网中的弧光接地使电压互感器频频烧毁。使用消谐器可有效地解决上述问题：消除或阻尼压变非线性励磁特性而引起的铁磁谐振过电压，这种谐振过电压会导致系统相电不稳定；能有效抑制间隙性弧光接地时流过压变绕组的过电流，防止压变烧毁；限制系统单相接地消失时在压变一次绕组回路中产生的涌流，这种涌流会损坏压变或使压变熔丝熔断；当系统发生单相接地后可较长时间保护压变免受损坏。

2, the arc grounding in the power grid makes the voltage transformer burned frequently. The use of harmonic elimination device can effectively solve the problem of eliminating or pressure dependent nonlinear excitation and damping caused by ferroresonance overvoltage, the resonant overvoltage will cause the system to electrical instability; can effectively inhibit the arcing current through the voltage transformer winding grounding, prevent transformer burned; limit variable system single-phase grounding disappears when a winding loop current at the pressure, the current will damage the pressure change or make pressure fuse; when the single-phase grounding system after a long time protect the Pt from damage.