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14 06,2024
How is the testing of transformer oil conducted?
How is the testing of transformer oil conducted? The dielectric strength test of transformer oil is conducted using a 500mm³ standard oil cup in a 60kV AC frequency oil tester. The brass electrodes of the oil cup have a diameter of 25mm, and the surfa...
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11 06,2024
How is the measurement of insulation resistance and absorption ratio conducted?
How is the measurement of insulation resistance and absorption ratio conducted? Insulation resistance, denoted as R, is typically determined by applying a voltage of 2500V for 60 seconds and measuring the resulting value using a megohmmeter with a max...
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07 06,2024
How is the measurement of winding resistance conducted?
How is the measurement of winding resistance conducted? When measuring winding resistance, both the bridge method and voltage drop method are employed. For resistance values exceeding 100, a single-arm bridge is utilized, while for values below 102, a...
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06 06,2024
What are the common electrical tests for transformers?
What are the common electrical tests for transformers? Conventional electrical tests for transformers are designed to identify internal faults and primarily include the following: a. Voltage Ratio Test: Used to verify the voltage ratio and determi...
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05 06,2024
How to conduct a pump test for oil-immersed transformers?
How to conduct a pump test for oil-immersed transformers? Performing a pump test for oil-immersed transformers is an essential step in the production and maintenance processes. For transformers that have completed the assembly, especially those with a...
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31 05,2024
How to perform oil leak repair?
How to perform oil leak repair? To achieve oil welding repair, the following measures can be taken: a. Considering the characteristic of rapid heat dissipation in oil leak repair, arc welding should be used for repairs instead of gas welding. ...
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30 05,2024
Can transformers be welded with oil for repair?
Can transformers be welded with oil for repair? The repair of oil leakage in transformer welding lines is a crucial task for operating personnel. If welding repairs are conducted during a power outage with oil drainage, the transformer body remains in...
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29 05,2024
Why is it necessary to fill nitrogen and dismantle components such as casings during transportation? And why is it required to remove the oil storage tank and safety duct during vacuum oil injection?
Why is it necessary to fill nitrogen and dismantle components such as casings during transportation? And why is it required to remove the oil storage tank and safety duct during vacuum oil injection? When the transport weight of a large tr...
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28 05,2024
What should be noted during the welding of leads for transformers with a voltage of 60kV and above?
What should be noted during the welding of leads for transformers with a voltage of 60kV and above? When welding leads for transformers with a voltage of 60kV and above, the following precautions should be taken: Before welding the leads, it is e...
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23 05,2024
What is the impact of temperature on the operation of transformers?
What is the impact of temperature on the operation of transformers? The ambient temperature refers to the naturally changing air temperature, with daily variations exhibiting a sinusoidal pattern. The annual ambient temperature variation follows a dou...
