The storage cabinet is located in the upper part of the transformer oil tank, also called oil pillow. It is set with a transformer tank communicated to the tank container volume change of transformer oil. The body can be divided into storage cabinets and OLTC storage cabinet.Two storage cabinets both split installation, are installed in one of the two operation when its internal insulation oil mutuallyunintelligible. The upper storage cabinet is installed in the transformer tank, connected with pipe and transformer oil tank. The volume of oil conservator transformer is generally the total amount of oil 8~10%.

The storage cabinet in the form of the structure can be divided into open storage cabinet and sealed storage cabinet. Full sealed oil storage tank can be subdivided into oil resistant rubber sealing oil conservator and metal bellows type oil conservator. The oil resistant rubber oil conservator can be subdivided into oil conservator capsule and diaphragm type storage cabinet; metal corrugated tube type oil storage cabinet can be subdivided into oil conservator and oil conservator (vertical and horizontal oil and oil).

No matter how the structure of oil conservator, mainly has the following two functions:

The oil volume changes caused by temperature change of the compensation body insulation (expansion or contraction), to ensure that the transformer oil tank keep full state.

The transformer insulating oil, only contact with the air storage cabinet or contact. It can reduce the contact surface of the transformer oil and air, prevent moisture absorption and oxidation of insulating oil.

The storage cabinet is an important component of the transformer, the transformer is installed on the top, is connected with the transformer tank. The size of the storage cabinet for transformer oil total weight of 8-10%. In normal operation, the conservator should maintain a certain amount of insulating oil, the amount of the lubricating oil level according to the temperature curves.

For the above 35KV transformer, working process of oil conservator requires full sealing state, the insulating oil and air, prevent moisture in the air and oxygen to make the oil moisture and aging of insulation, insulation. The element is used to isolate the traditional rubber diaphragm and the rubber, new alternatives for metal bellows.

Rubber oil conservator has nearly thirty years of history, has the following main problems:

Glue a poor durability, not equivalent and transformer life, usually in life time of the main transformer in the regular maintenance and replacement (3~5). This gives the power system equipment surge brought long maintenance pressure.

About the structure factors, will produce gel capsules and diaphragm, and most of the time are stored with water or water (moisture absorber limited role), this phenomenon can be seen in every repair. The working condition of oil conservator is of great danger to the main transformer, especially rubber products easy to aging, cracking, moisture permeability, rubber pieces of the often hidden in the state into the oil, can not be found in time.

The bag type storage cabinet has installed filling procedure cumbersome, false oil level is widespread, mouth breathing should be subject to blockage problems in use.

As for the diaphragm type oil conservator, leakage of the sealing surface of the surrounding is always difficult to solve problems in the work of standards.

Metal bellows type oil conservator characteristics of Shenyang Tiangong Electric Power Technology Co. Ltd production:

(1) made of stainless steel, high strength, long service life, corrosion resistance, good reliability.

(2) the ultra soft corrugated pipe structure, volume compensation ability outstanding, can replace various specifications of rubber or diaphragm type oil storage cabinet.

(3) the real implementation of the welded structure, good sealing, no leakage.

(4) complete function, has limited oil level alarm and false oil level displaying, exhaust gas, sewage and other functions

(5) external magnetic coupling over the oil level gauge, completely isolated from the oil storage cavity, easy to check replacement, no sealing problems, safe and reliable, clear and accurate.

(6) to the new storage cabinet does not affect the original transformer insulation, the pipe connection dimension of the oil tank, oil product installation is very simple, can achieve full vacuum oiling.

Shenyang Tiangong Electric Power Technology Co. Ltd.

Shenyang Tiangong Thermoelectric equipment Co. Ltd.