1）Due to poor manufacturing quality and other reasons, the internal components of the amperometric capacitor breakdown
2) Due to poor sealing of the casing back and into the moisture, the answer reduces the insulation resistance; due to seepage, oil leakage, oil level drop, which leads to discharge to the shell or component breakdown
3）Internal free and drum belly
When the internal corona, breakdown discharge and serious free of the safety capacitor, the safety capacitor will produce a series of physical, chemical and electrical effects under the action of overvoltage, accelerate the insulation aging, decomposition and gas, forming a vicious circle, so that the pressure of the case increases, resulting in the drum outside the case wall and then lead to frying.
(4) insulation damage, especially the high-voltage side of the lead wire manufacturing process is poor, uneven edges, burrs or serious folding, the tip is easy to produce corona, corona so that the oil decomposition, case expansion, oil surface drop and cause component breakdown
In addition, in the cover if the corner of the burnout time is too long, destroy the internal insulation, reduce the breakdown voltage, but also easy to cause damage to the safety capacitor, and then cause a blowout accident
14D270K エポキシ樹脂膜付酸化亜鉛バリスタ

14D270K エポキシ樹脂膜付酸化亜鉛バリスタ

5）When closing the gate with electricity, the voltage polarity may be opposite to the polarity of the residual charge of the safety capacitor at the moment of closing the gate, thus causing the blowing up.
(6) Poor ventilation, high temperature rise, serious overvoltage and large voltage harmonic component will also cause blowing up.
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