What are the precautions for using the variable frequency series resonance withstand voltage test device? Wuhan UHV specializes in the production of series resonance, with a wide range of product selection and professional electrical testing. To find series resonance, choose Wuhan UHV.
1, Precautions for frequency conversion series resonance withstand voltage test device:
1. This testing equipment should be used by professionals in high-voltage testing. Before use, the user manual should be carefully read and repeatedly operated and trained.
2. There should be no less than 2 operators. Strictly follow the safety operation regulations of our unit regarding high-voltage testing when using it.
3. In order to ensure the safety and correctness of the test, in addition to being familiar with the product manual, it is also necessary to strictly follow the relevant national standards and regulations for the test operation.
4. Each connecting wire must not be connected incorrectly, especially the grounding wire must not be connected incorrectly. Otherwise, it may cause damage to the testing device
5. When using the frequency conversion series resonance withstand voltage test device, the output is high voltage or ultra-high voltage, and it must be reliably grounded, paying attention to operational safety.
6. When the power is turned on and the voltage still cannot be boosted after returning to zero, please press the reset button for a long time (about 10 seconds) and make the indicator lights on the control box panel normal, that is, no other red lights are on except for "high voltage", and then start normal operation
7. When the voltage is greater than 10V and has not been tuned yet, the system will automatically detune to prevent high voltage damage to the test sample or even harm to the human body caused by resonance.
2, Precautions for arranging test grounding wires:
Due to the large capacitance of the tested cable, if the test sample breaks down or high-voltage leads discharge to ground during the test, transient overvoltage may occur at the grounding end of the cable, the test grounding wire, and the control box casing. This equipment has been equipped with multiple transient overvoltage protection measures in the control box and main components to ensure its normal operation. In addition, the following protective measures should be taken in the layout of the test grounding wire:
1. The test equipment (resonant reactor, voltage divider, excitation transformer, etc.) should be placed as close as possible to the tested cable head to reduce the length of the test grounding wire, that is, to reduce the inductance of the grounding wire.
2. Adopt a specially designed one point grounding test grounding wire group. Special attention should be paid to keeping the test grounding wire as short as possible and not arbitrarily extending the length of the grounding wire.
3. During the experiment, the operator should not touch the metal casing of the control box except for the tuning and voltage regulating insulation knobs, otherwise there may be a slight stinging sensation when piercing or discharging on the high-voltage side. When conditions permit, it is recommended that operators work standing on rubber insulation pads.