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 essential to wrap the base of the leads to be welded with wet […]
What impact does altitude have on the operation of transformers? In areas where the altitude does not exceed 1000 meters, transformers can operate without considering the altitude factor. However, in regions with altitudes above 1000 meters, transformers must take into account the impact of thin air on heat dissipation and the stability of external insulation
What is the function of the safety vent of a transformer? The safety vent, commonly referred to as an explosion-proof tube in the power supply industry, is a traditional protective device that is rarely used in newly designed transformers. Its main function is to rapidly release a large amount of gas through the safety vent
What are the characteristics of the three commonly used winding configurations in transformers? (1) Y-shaped winding characteristics: The Y-shaped winding has a winding current equal to the line current, with a larger wire cross-section, providing excellent mechanical strength. The winding voltage is equal to 1/√3 times the line voltage, resulting in fewer turns and insulation
How is the protection of the lightning arrester at the neutral point of the transformer carried out? For transformers operating in a system with an effectively grounded neutral point, if the neutral point is not grounded, a lightning arrester should be installed at the neutral point. Similarly, for transformers operating in a system with a
How is the External Withstand Voltage Test conducted? The External Withstand Voltage Test is a one-minute AC high-voltage test conducted on the tested transformer, also known as the AC Withstand Voltage Test. This test is employed to assess the insulation performance between different winding sides and between windings and ground, specifically evaluating the main insulation
What types of capacitive bushings are there? For voltage levels of 110kV and above, using oil-immersed bushings would result in excessively large dimensions. Therefore, it is necessary to employ solid insulation manufactured based on the principle of capacitive voltage division as the primary insulation, namely by using a capacitive core. Depending on the material and
How is the lightning arrester protection of the transformer carried out? The lightning arrester is the most crucial basic component for protecting power generation equipment and transmission and transformation equipment. It also forms the foundation for determining the insulation level of high-voltage electrical equipment. Installed in front of the transformer, the arrester mainly consists of
What are the precautions for live oil filtration? (1) Throughout the entire process of live oil filtration and degassing, the gas relay circuit of the transformer must be connected to the signal circuit to prevent gas leakage and oil running in the pipeline, causing the oil switch to trip and resulting in a large-scale power
How are the deviation values of transformer parameters and the parameters using peak values specified? The specifications for evaluating the performance parameters of transformers are determined by technical conditions, and each standard value has corresponding deviation values, which can be categorized into several types: (1) Parameters with only a lower limit specified, without an upper
