Analysis of Influence of Insulation Fault of Cable Terminal on 10 kV Outdoor Dry-type High-Voltage Metering Device
This paper reports an explosion accident which happened in 10 minutes after the installation of a 10 kV outdoor dry-type high-voltage metering device.By combining different types of back-end equipment of the metering device with cable test data,and analysis from appearance to essence,it determines the cause of the explosion as back-end heat shrinkage-induced terminal charging which leads to resonance of voltage transformer and ultimately to explosion.It also outlines the handling of the accident by on-site attendant,and proposes some suggestions of countermeasures.
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