Power transformer fault resolution

1. Leakage oil at the weld

Mainly due to poor welding quality, there are virtual welding, de-soldering, pinholes, sand holes and other defects in the weld. The power transformer is covered by solder and paint, and the hidden danger is exposed after operation. In addition, the electromagnetic vibration will cause welding. Cracking, causing leakage. For those leaks that have already occurred, first find the leak point and not miss it. For the serious leakage part, a metal tool such as a flat shovel or a sharp punch can be used to rive the leakage point. After controlling the leakage amount, the surface of the treatment is cleaned. Most of the polymer materials are used for curing, and the long-term treatment can be achieved after curing. The purpose of leakage.

2, seal leakage oil

The reason for poor sealing is that the sealing of the box edge and the cover is sealed with an oil-resistant rubber rod or rubber pad. If the joint is not handled properly, it will cause oil leakage failure. Some are tied with plastic straps, and some directly press the two ends together. Because of the rolling during installation, the interface can not be pressed, and the sealing effect is not obtained, and the oil is still leaking. It can be bonded with Fussian blue material to make the joint form a whole, and the oil leakage phenomenon is greatly controlled. If the operation is convenient, the metal shell can be bonded at the same time to achieve the purpose of leakage treatment.

3. Leakage oil at the flange joint

The surface of the flange is not flat, the fastening bolts are loose, the installation process is not correct, and the bolts are not fastened, resulting in leakage of oil. After the loose bolts are tightened, the flanges are sealed and the bolts that may leak are also treated for complete treatment. Fastening the loose bolts must be carried out in strict accordance with the operating procedures.

4, bolt or pipe thread leakage oil

The processing is rough at the factory, the sealing is poor, and the power transformer is sealed for a period of time to cause a leakage oil failure. The bolts are sealed by polymer materials to achieve the purpose of treating leakage. Another method is to screw out the bolt (nut), apply the Fu Shilan release agent on the surface, and then fasten the surface after applying the material. After curing, the treatment can be achieved.

5, cast iron pieces leaking oil

The main cause of leakage oil is caused by sand holes and cracks in the cast iron. For crack leakage, drilling the hole is the best way to eliminate stress and avoid extension. In the treatment, according to the crack situation, the lead wire is tapped on the leak point or shackled by hand hammer. The leak was then cleaned with acetone and sealed with material. Cast sand holes can be sealed directly with materials.

6, the radiator leakage oil

The heat pipe of the radiator is usually made of a flat steel pipe and then pressed to form a leakage oil in the curved portion and the welded portion of the heat pipe. This is because when the heat pipe is punched, the outer wall of the pipe is subjected to tension and the inner wall is subjected to pressure. , due to residual stress. Close the upper and lower flat valve (butterfly valve) of the radiator, so that the oil in the radiator is separated from the oil in the tank to reduce the pressure and leakage. After the leaking site is determined, the appropriate surface treatment is carried out, and then sealed with Fussian blue material.

7, porcelain bottle and glass oil standard leakage oil

Usually due to improper installation or seal failure. Polymer composite materials can be used to bond metals, ceramics, glass and other materials to achieve the fundamental treatment of leakage oil.