Oil system of wet transformer

The wet transformer has several independent oil systems that are isolated from each other. When the wet transformer is running, the oils in these independent oil systems are not connected, and the oil quality and operating conditions are different. So what is the oil system of the wet transformer? There are two aspects to be introduced next.

This is the content list:

• wet transformer main body internal oil system

• Oil in the diverter switch compartment of the on-load tap-changer

wet transformer main body internal oil system

The oil system that the wet transformer communicates with the oil around the windings is the main body system, including the oil in the cooler or radiator, the oil in the oil conservator, and the oil in the oil injection bushing of 35kV and below. When the wet transformer is filled with oil, the gas bleed plugs stored in the oil system must be discharged. Generally speaking, the above components should have their bleed plugs. The oil in the main body of the wet transformer is mainly used for insulation and cooling. The wet transformer oil can also increase the electrical strength of insulating paper or cardboard. When the wet transformer is filled with oil in a vacuum, if some parts cannot withstand the same vacuum strength as the main oil tank, a temporary gate should be used for isolation, such as the gate valve between the wet transformer oil conservator and the main oil tank. The head of the submersible pump on the wet transformer cooler must be sufficient to avoid sucking in the air due to negative pressure. This wet transformer oil system must have a pressure relief device protection system to eliminate the pressure generated when the body is faulty.

Oil in the diverter switch compartment of the on-load tap-changer

This part of the wet transformer has its protection system, that is, the flow relay, the oil storage tank, and the pressure release valve. The oil in the switch room of this wet transformer acts as insulation and extinguishes current. The wet transformer oil will go into the oil generated when the load current is cut off by the switch. This wet transformer oil system must have good sealing performance, even if arc pressure is generated during the switching process, the sealing performance of the wet transformer must be protected. Although the oil in the diverter switch chamber of the wet transformer is isolated from the oil in the main body, when the wet transformer is filled with vacuum, to avoid damaging the seal of the wet transformer diverter switch chamber, it should be at the same time as the oil in the main body. Vacuum oil filling. When vacuum filling, the two systems have the same vacuum degree. If necessary, the oil conservator of this system should be isolated when vacuuming. For the structural convenience of the wet transformer, the oil storage tank of the wet transformer main body and the oil storage tank of the diverter switch room is designed as a whole isolated from each other.

Zhejiang Shuntong Electric Co., Ltd. is a professional manufacturing enterprise integrating development, production, sales, and service. The main products are dry-type transformers, oil-immersed transformers, special transformers, box-type substations, cable junction boxes, high and low voltage complete sets of equipment, voltage regulating equipment, etc. This series of products are mainly suitable for commercial buildings, high-rise buildings, airports, schools, industrial and mining enterprises, power plants, oil platforms, subways and tunnels, and other important places with special fire protection requirements. The above is about the relevant content of the wet transformer oil system. If you are interested in a wet transformer, please contact us. Our website is www.sntoom.com. We look forward to your visit and hope to cooperate with you.