Measuring device for impulse grounding resistance of movable tower

2011 
The utility model relates to a measuring device for impulse grounding resistance of a movable tower, which comprises a charging source insulating frame, a discharge circuit capacitor insulating frame, a waveform formation network insulating frame and a test operation insulating frame/stand. An insulating support frame and universal turning wheels are arranged below each insulating frame; the working voltage of the device can reach 400kV; the value of amplitude of the output current of the device is 10kA; and a waveform parameter meets the technical requirement of 8/20mus. Moreover, waveform formation resistance R and waveform formation inductance L can be conveniently adjusted according to the dimension of a test site. An isolation transformer is adopted to independently supply power to a control unit, and moreover, a remote control operation beyond 50m can be realized by adopting a far infrared remote control mode; and a non-contact Rogowski coil current sensor and an oscilloscope are adopted to carry out impulse current measurement, and an uninterrupted power supply (UPS) is adopted to independently supply the power to the oscilloscope, thereby, the accuracy of the impulse current measurement and the safety and the reliability of a high-voltage operation are greatly improved, and the requirement of the in-site measurement on the impulse grounding resistance of the movable tower is met.
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