Thyristor rectifier cabinet short-circuit test
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3-phase fully controlled bridge rectifier, with an output current of 16,000 amps. Conduct a short-circuit test. Can the positive and negative DC buses be directly short-circuited to increase the current for testing? I know that a water supply pipe can be used to short-circuit the positive and negative busbars. Is it feasible to short-circuit the positive and negative busbars using several cables placed side by side (so that their cross-sectional area is greater than that of the DC busbar)? Has anyone done this?
Reply to 1# zhanglx1982: The purpose of the short-circuit test for the rectifier unit is to verify whether each power stage and the pulse amplification drive circuit can vary in consistency with the given output waveform, as well as to check the synchronization between the control signals and the AC side of the main circuit. The output terminal of the rectifier device is allowed to be short-circuited. The short circuit should preferably be in a water-cooled form, mainly to address heat dissipation issues. Because the debugging time can be long or short, and it is unpredictable. It is also acceptable to increase the cross-sectional area of the copper bars; there is no problem with that, but a dedicated person needs to be assigned to supervise the process during debugging. The form of short-circuit wires used is mainly such as those with water flow, as adopted by the testing department. At the production site, simply short-circuit the output connection wires of the device in practical use by using a short circuit.
Reply to 2# czywqa: Thank you, I’ll give it a try if I have time.
The short-circuit point is at the end of the wire running from the main circuit of the device to the motor, on the side of the motor; this is also done to test the overload capacity of that section of wire.