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DEVICE FOR VOLTAGE TESTING OF CABLES AND CABLE FITTINGS BY A VERY LOW FREQUENCY VOLTAGE
DEVICE FOR VOLTAGE TESTING OF CABLES AND CABLE FITTINGS BY A VERY LOW FREQUENCY VOLTAGE
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机译:通过非常低的频率电压对电缆和电缆配件进行电压测试的设备
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摘要
The voltage testing device has a control stage and a HV stage, provided by a setting transformer (1), with a positioning drive (2), coupled via a switch (3) with the primary winding of a HV transformer (4). The secondary winding of the HV transformer is coupled on one side to the insulation of the tested cable (10) via a shunt (8) and to the core of the tested cable via a measuring voltage divider (9), the opposite side of the secondary winding coupled to the cable core via a pair of anti-parallel rectifiers (5,6) and a HV switching device (7). The tested cable is connected in parallel with a discharge device (11).
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