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Types of Oil Immersed Transformers for Sale

The oil-immersed amorphous transformer is equipped as low coercive force, low loss, good temperature stability and strong protection for thunder and lighting. With the combination of advanced manufacturing process and equipment, it is remoted in communication, test, adjustment, and control by computer. All oil insulated transformers are qualified by National Mechanical & Industrial Bureau and National Power Company. Our oil insulated transformer is widely used in power network, projects, grid construction, etc.

Oil-Immersed Amorphous Alloy Transformer

Oil Immersed One Load Regulating( OLTC ) Transformer

How Often Should Transformer Oil Be Changed

Generally speaking, there is no specific time for the replacement of transformer oil, and some can be used for more than 20 years. The change of transformer oil mainly depends on the state of the oil in operation.
According to the oil transformer testing, the transformer oil in operation must be tested for oil quality analysis every time a period of time has passed. According to the results of the testing and analysis or the operating status of oil insulated transformer, consider whether the transformer oil needs to be replaced.

Procedure of Filling Oil in Transformer Tank

Oil filling of oil field transformer usually takes the following two methods;
1. Vacuum oil filling: According to the requirements of the factory manual. While keeping the oil tank with a certain degree of vacuum, slowly inject qualified transformer oil from the drain valve at the bottom of the oil tank (the vacuum degree will not be released during oil filling).
2. Conventional oil injection: Under atmospheric pressure, use an oil pump to inject qualified transformer oil into the oil tank.

Oil Type Transformer Safety

The basic protections used in oil field transformers especially power transformers can be categorized in two parts i.e. Electrical Protection & mechanical Protection. Main electrical protections are Differential, REF, over flux and over load Protection while the Over current, Earth Fault & Distance Protection is used as backup protection. For oil field transformers the mechanical protections which are discussed below are important:
1. Buchholz Relay
2. Sudden Pressure Relay
3. Winding Temperature & oil Temperature Alarm & trip.
4. Oil Level Alarm and Trip Arrangement.
5. PRD Alarm & Trip.
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