Three reasons for transformer water entering and damp

When we use the Transformer, Zhenhua Xiaobian reminds you to pay attention to avoid accidents. It is also an important part of transformer accident and burn out caused by water intrusion of transformer. Many transformers are in water or continue to operate, so it poses a threat to the security of power system. The reason why the separated transformer is simply affected by water and damp is as follows:

1、 The sealing of casing top connecting cap is poor.

When the sealing of the connecting cap is not good, the moisture will enter into the winding insulation along the lead wire, causing breakdown accident. The main reasons for poor sealing of casing end are unreasonable structure and incorrect rubber pad device.

2、 Damp during maintenance

When the hanging cover of transformer is overhauled, the body is exposed to the atmosphere. When the relative humidity is high, the insulation will absorb the moisture in the air. This process starts from the surface insulation. The higher the relative humidity and the longer the time, the deeper the water penetration depth.

3、 Cracking of brass tube of cooler

According to the rules, the cooler should be tested before the device in order to detect the cracking defects of the cooler. Otherwise, it may lead to insulation breakdown accident. For example, a 150 MVA, 10 kV power transformer is in operation

Light and heavy gas protection action trip, explosion-proof simple oil injection. Through the inspection of hanging cover, 24 sections were burnt out at the lower part of phase a high-voltage winding, and there were 4 short-circuit points, and two fluky melting holes were up to 100 mm. The reason was that the copper tube of the cooler was broken

Crack, caused by water entering the transformer.

The main power distribution unit is affected by water and humidity, which will greatly damage the electrical function and physical and chemical function of insulation medium. The existence of water will damage the insulation strength of oil, and also has corrosive effect on copper, iron and other metals, so when the transformer water inflow occurs, it should be treated in time

Therefore, we must pay attention to when using transformer. Similarly, in the purchase of transformers can not blindly look at the price oh, Zhenhua Xiaobian reminds you that quality is the most important Oh.