The reason why the transformer of salt bath furnace is easy to enter water and get damp

When we use the salt bath furnace transformer, we remind you to pay attention to preventing accidents. The water inflow of the salt bath furnace transformer is also an important part of the accident and burnout of the salt bath furnace transformer. Many salt bath furnace transformers are flooded with water. It is still running continuously, so it poses a threat to the safety of the power system. The reason why the transformer of the salt bath furnace is easy to enter the water and get damp has the following aspects:

First, the casing top connecting cap is not well sealed.

When the sealing of the connecting cap is not good, the moisture enters the winding insulation along the lead wire, causing a breakdown accident. The main reasons for the poor sealing of the sleeve end are the unreasonable structure and the incorrect installation of the rubber pad.

2, damp during maintenance

When the hood of the salt bath furnace transformer is overhauled, the body is exposed to the atmosphere. When the relative humidity of the air is high, the insulation will absorb the moisture in the air. This process starts from the surface insulation. The higher the relative humidity, the longer the moisture The deeper the penetration is.

3, the cooler brass tube is split

According to the rules, the cooler should be tested for leakage before installation in order to detect the split defect of the cooler. Otherwise, it may lead to an insulation breakdown accident. For example: a 150MVA, l10kV power salt bath furnace transformer is light in operation Heavy gas maintenance action tripped, explosion-proof simple fuel injection. After inspection of the hood, a total of 24 line segments of the lower part of the A-phase high-voltage winding were burned out, there were 4 short circuits, and the 2 melted holes reached 100mm. The reason was that the copper tube of the cooler was broken. , formed by water entering the transformer of the salt bath furnace.

The water inflow of the main power distribution device is damp, which will greatly damage the electrical and physical and chemical functions of the insulating medium. The presence of moisture will damage the insulating strength of the oil, and also have a corrosive effect on metals such as copper and iron, so when a salt bath occurs Furnace transformer salt bath furnace transformer should be dealt with in time when water enters

Therefore, we must pay attention when using the salt bath furnace transformer. Similarly, when purchasing the salt bath furnace transformer, we should not just look at the price. We remind you that the quality is the most important thing.