Usage Method of Inflatable Test Transformer - Yangzhou Darui
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Usage method of inflatable test transformer:
1. Connect the working circuit properly and ensure good grounding.
2. Set the voltage and current setting values according to the instruction manual first.
3. Boost the voltage according to the regulations, and the boosting speed must be less than 3000V/s.
4. When the voltage rises to the test voltage, start timing. After 1 minute, quickly reduce the voltage to below 1/3 of the test voltage before cutting off the power supply.
5. During the boosting or withstand voltage test, if any of the following abnormal conditions are found, immediately reduce the voltage, cut off the power supply, stop the test, and investigate the cause.
(1) The voltmeter pointer swings (or the digital display fluctuates) significantly
(2) The ammeter rises linearly
(3) Abnormal sounds occur inside the tested object
6. Item 9 refers to the pressure valve and pressure gauge, which are in a long-term closed state. Open the valve once every 6 months to check the SF6 pressure, which should not be less than 0.4MPa (close the valve immediately after checking the pressure). If it is lower than 0.4MPa, add SF6 gas to increase gas insulation.
7. Before and after the withstand voltage test, measure the insulation resistance of the tested equipment to check the insulation condition.
8. The operation must strictly implement relevant national standards and operating procedures, and can refer to GB311-83 "Insulation Coordination of High-Voltage Transmission and Transformation Equipment, High-Voltage Test Techniques", "Preventive Test Procedures for Electrical Equipment", etc.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
