NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–POE Tester
Rules that high-voltage test transformers must follow when conducting high-voltage tests Rules that high-voltage test transformers must abide by when conducting high-voltage tests work ticket. Fill out a work ticket when an electrical connection is subject to inspection and testing at the same time. However, before the test, the permission of the person in charge of the maintenance work should be obtained. In the same electrical connection part, after the work ticket for the high voltage test is issued, it is forbidden to issue a second work ticket.
For example, the disconnection point between the pressurizing part and the maintenance part shall have a sufficient safety distance according to the test voltage, and when there is a short circuit on the other side, the series resonance can be tested on one side of the disconnection point, and the other side can continue works, but at this point it should hang at the disconnect point“Stop, high voltage danger!”2. There should be no less than two people in the high-voltage test work, and the person in charge of the test should be an experienced person. Before starting the test, the person in charge of the test should arrange the safety precautions in the test in detail for all test personnel; 3. When the equipment joint needs to be disconnected due to the test, it should be marked before disassembly, and checked after connection; 4. The metal casing of the test device should be grounded reliably, the high-voltage lead should be shortened as much as possible, and it should be firmly supported by insulators if necessary. The power switch of the device should be a double-pole switch that is obviously disconnected. In order to prevent mis-closing and cutting, an insulating cover can be added to the blade. There should be two series-connected power switches in the low-voltage circuit of the test device. Gate device; test transformer“Stop, high voltage danger!”6. Before pressurizing, it must be carefully checked, and the meter magnification of the wiring must be tested, and the voltage regulator is in the zero position and the starting state of the instrument. , all are correct, notify the relevant personnel to leave the tested equipment, and obtain the permission of the person in charge before pressurizing. During the pressurization, there should be monitoring and singing. The high-pressure test staff should concentrate on all the pressurization and do not communicate with each other. Others chat, always alert for abnormal phenomena. The operator should stand on the insulating pad; 7. When the wiring is changed or the test is over, the test power supply should be disconnected first, and the high-voltage part of the booster should be short-circuited to the ground; It should be discharged first and then tested. When the high-voltage DC test is over, the equipment should be discharged to the ground several times and short-circuited to the ground. 10. For special important electrical tests, detailed test measures should be taken and approved by the production leader (chief engineer). High-voltage test transformers must comply with the regulations when conducting high-voltage tests High-voltage transformer manufacturer Shenzhen Noyafa Electronic Technology Co., Ltd.
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