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OVERVOLTAGE PROTECTION FOR HV BUSHING TEST TAP
OVERVOLTAGE PROTECTION FOR HV BUSHING TEST TAP
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机译:HV衬套测试水龙头过电压保护
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摘要
The present disclosure relates to a protection device (7) configured for being electrically connected to a test tap (9) of a HV bushing for protecting the bushing from transient overvoltages. The protection device comprises at least two parallel connected protection branches (20) connected between the test tap and a ground connector (24) configured for connecting to ground. Each of the protection branches comprises a plurality of parallel connected gas discharge tubes (21), a Transient-Voltage-Suppression (TVS) diode (22) connected in series with the gas discharge tubes, and a resistor (23) connected in series with the gas discharge tubes and across the TVS diode.
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