Residential Distribution Transformer Rated Capacity
The rated capacity of the residential distribution transformer is different, and its area and volume are different, but no matter what kind of transformer, its structure is basically the same. The insulating enameled wire is wound into two wire wraps, one is a high-voltage wire wrap, and the other is a low-voltage wire wrap. Finally, the high and low-voltage wires are wrapped around the iron core of the silicon steel sheet, and immersed in insulating varnish for moisture-proof treatment and can be used after drying. .
When the residential distribution transformer is immersed in water or damp in use, the surface of the enameled wire is exposed to water or moisture. Due to the presence of corrosive substances in the water, the enameled wire becomes moldy and deteriorated and the insulating paint falls off or the degree of insulation decreases. Electrical breakdown occurs between turns, resulting in inter-turn short circuit or inter-layer short circuit. When the above fault occurs in the transformer, a large short-circuit current is generated in the short-circuit circuit, which makes the transformer heat up quickly until it burns out. Under normal circumstances, it is first to heat up, and then to smoke, so when the residential distribution transformer has a strange smell, you should immediately cut off the power to check the cause.
There are also the following reasons for transformer heating and burning: when the rated power of the transformer does not match the load power, the load of the transformer is arbitrarily increased to make it in an overload state; the temperature of the working environment is too high; the cooling equipment of the transformer is damaged or the vent is blocked, and the transformer is too close to the heat source Wait.
There are many places where transformers are used in electrical equipment, so during its operation, it should be strictly waterproof and immersed in the transformer or placed in a humid environment for a long time. When the transformer is immersed in water, drying measures should be taken in time. If the transformer is used in a humid environment, ventilation should be strengthened to minimize the degree of humidity. When the transformer is not used for a long time, it should also be energized and dehumidified regularly to keep the interior dry.
