How oil-immersed transformer maintenance and repair?

Oil-immersed transformer maintenance and repair has been a lot of transformer users urgent need to understand the problem, although dry-type transformers have several advantages over oil-immersed transformers, oil-immersed transformers but proper maintenance, but also has its own unique advantages . Let us look at oil-immersed transformer maintenance and repair methods it.

1, to prevent leakage of oil: oil-immersed transformers filled with 100kva distribution transformer oil in the tank, the fastener assembly rely on oil pressure and the sealing rubber elements. Mifengbuyan is the main transformer oil leakage, we should pay particular attention to the care and maintenance. Small bolts are loosened through vibration, if loose should intensify solid and intensify the degree should be appropriate and should be consistent throughout. Rubber is broken or seriously deformed. Then updatable rubber parts, replacement should pay attention to its model specifications are the same, and clean the sealing surfaces.

2, the prevention of transformer moisture: Transformer is a high-voltage equipment, required to maintain its good insulating properties. Oil-immersed transformers easily damp, damp prevention is one of the main measures taken by the maintenance of the transformer. To do this requires the user to note the following: the purchase of the transformer, power supply bureau should immediately do the transfer test; immediate installation of moisture, a transformer capacity of 100 kVA and above all with breathers. A transformer should be immediately transported to the site to install breather to prevent the body from moisture inside the device. Monitoring breathers in the silica gel should be replaced immediately after wet. Breathers in silica gel, play a role in the absorption of moisture and protect the transformer. After saturated with moisture, silica gel changes color, then be replaced with new dry silica gel. Orders should pay attention to, to try to reduce the storage time before the transformer power transmission. After the 13.8kv single phase transformer  manufacturing, storing easily when wet, damp storage longer the more serious, it should be good schedule to shorten the storage time. Capacity of 100 KVA and below the small transformer, no moisture absorption device. Oil within the oil pillow easy to damp, and the oil pillow water. Do not send electricity from the store more than six months or of more than one year in operation, the oil inside the transformer oil has been severely damp pillow. If you want to be when lifting transportation, maintenance fuel, oil drain valve, hanging core, etc., should be through the oil drain plug pillow below the waste oil within the oil pillow let go, and wipe with a dry cloth, sealed to avoid the oil pillow inside dirty oil into the tank. Transformer operation, should always pay attention to the oil level, change oil temperature, voltage, current, if abnormal situation should be timely analysis and processing. When the transformer is installed non-aluminum wire, aluminum row and so connected with the guide rod copper transformer in order to avoid corrosion guides.
3, oil change and drying transformer: Transformer idle for too long, the running time is too long or other natural factors, resulting in transformer insulation deterioration, internal water or oil degradation and other phenomena, this time must the transformer oil change and drying process. Transformer oil change: first the body of hanging out, put the net and wash tank waste oil, such as device should rinse the body with oil. To be injected into the body of the new oil after drying, replacing all the oil and rubber seals. After passing the test before hanging run. Transformer drying process: the body of the drying methods more. When the user to bake drying method available zero-phase sequence, vortex drying, short drying, oven drying method. Larger capacity and voltage of 35 kV transformer pole, it is best to send the manufacturer for vacuum drying. This will not only ensure that the transformer insulation drying thoroughly, without making the aging of insulation.