The protection and maintenance of oil-immersed power transformer has always been a problem that many transformer users urgently need to understand. Although
Dry Type Transformer has advantages over oil-
Immersed Transformer, the protection and maintenance of oil-immersed power transformer is proper, which also has its own unique advantages. So, oil-immersed power transformer in the protection and maintenance of the need to pay attention to what methods? Tianhong Power technology for you!
What are the protection and maintenance methods of oil-immersed power transformers?
1. How to prevent the transformer from getting damp: The transformer is a kind of high voltage equipment, which requires good insulation performance.
Oil-Immersed Transformers are susceptible to moisture. Moisture protection is one of the main measures to protect and maintain transformers. To this end, the user is required to pay attention to the following matters: after the transformer is purchased, the power supply bureau should be requested to conduct an explanatory test immediately; A moisture absorber should be installed immediately and should be equipped with a transformer capacity of 100kVA and above. A moisture absorber should be installed immediately after the transformer arrives at the site to prevent internal moisture. Monitor the silica gel in the hygroscoter and replace it as soon as it gets damp. The silica gel in the moisture absorber absorbs moisture and protects the transformer. After wet adsorption, the color of silica gel changes, and new dry silica gel needs to be replaced.
2. Prevent oil leakage: the oil-immersed transformer oil tank is filled with transformer oil, and the oil-resistant rubber components are pressurized and sealed with fasteners during assembly. Lax sealing is the main reason for transformer oil leakage, special attention should be paid to protection and maintenance. Whether the small bolt is loose due to vibration. If loose, it should be tightened. The degree of tightening should be appropriate and consistent everywhere. Whether the rubber is cracked or deformed. When replacing the recycled rubber parts, pay attention to whether the model and standard are consistent, and keep the sealing surface clean.
During the operation of oil-immersed power transformer, always pay attention to the change of oil level, oil temperature, voltage and current. Analyze and deal with abnormal situations in time.
When installing the oil-immersed power transformer, it is strictly forbidden to connect the aluminum strand and aluminum strip with the copper guide rod of the transformer to prevent the guide rod from corroding.
3 Oil-immersed power transformer oil change, drilling treatment: the transformer idle time is too long, the operation time is too long, or affected by other natural and human factors, resulting in transformer insulation decline, internal water or oil quality deterioration. At this point, the transformer must be replaced and drilled.
Oil-immersed power transformer oil change: first lift out the body, discharge the dirty oil, clean the oil tank. If there is oil on the body, rinse. After body is dry, inject new oil and replace all oil resistant rubber seals. After passing the test, the network can be suspended and run. Drying treatment of transformer: there are many drying methods of transformer body. Users can use zero sequence boring method, eddy current boring method, short circuit boring method, oven boring method and so on. For transformers with large capacity and voltage of 35kV, it is recommended to send them to local power manufacturers for vacuum drying. This ensures that the transformer insulation is dry and intact without aging the insulation.
The above is the protection and maintenance method of oil-immersed transformer. If you want to know more about oil-immersed transformer, please feel free to consult us!
