北京维普尔顿科贸有限公司

The dry-type transformer produced by the transformer manufacturer is an important power equipment. Generally speaking, the application of the transformer is also relatively extensive. In all the faults of the transformer, attention should be paid to the type and solution of the fault of the transformer, so that for the future The application of the transformer and the resolution of the fault will have greater benefits. What are the types of transformer faults and the types of faults? Let's take a look with the editor of our transformer manufacturer: we all know that dry-type transformers play an important role in adjusting and improving the voltage in the circuit , For dry-type transformers, its adjustment must be adjusted according to the specific dry-type transformers in the circuit. Generally, dry-type transformers have five gears, and each gear has a different adjustment method. But usually it is adjusted according to the voltage level.

1. Dry-type transformer winding and inter-turn insulation fault. The insulation between windings and turns is the part that is more prone to failure. Long-term overload operation or poor heat dissipation conditions and long service life are easy to make the insulation of the transformer windings age and brittle, and the electrical strength is greatly reduced. Voltage fluctuations may also break down the insulation. Water in the transformer oil will greatly reduce the insulation strength and cannot withstand the allowable voltage, resulting in insulation breakdown. In the high and low voltage winding parts, due to the expansion of the insulation, the oil passage is blocked, which will also affect the heat dissipation, and the insulation will be too old, resulting in a short-circuit fault. Due to imperfect lightning protection measures, insulation breakdown may also occur.

2. Lead wire insulation failure. The transformer lead is connected to the external circuit through the inner cavity of the transformer bushing, and the lead is insulated by the bushing. If the casing is not tightly closed and water enters, it will cause the insulation to be damp and break down. In severe cases, the fuel tank will be exposed to the air, resulting in internal flashover and wiring failure.

3. Core insulation failure. The iron core of the transformer is made of stacked silicon steel sheets. There is an insulating paint film between the silicon steel sheets. If the silicon steel sheets are not fixed properly, the paint film will be damaged and eddy current will be generated. The core screws, weights and other components that clamp the iron core love you. If the insulation is damaged, overheating will also occur. In addition, iron filings and iron slag falling into the transformer will cause iron core failure.

4. Flashover and explosion of dry-type transformer bushing. The high-voltage side of the transformer mostly uses capacitor bushings, which have trachoma or cracks due to poor porcelain quality, defects in the capacitor itself, internal free discharge, and even if the bushing is not well sealed, there is oil leakage, and if the bushing is dirty, flashover and explosion may occur.

5. The tap changer is faulty. The fault of the tap changer is one of the common faults of the transformer. It is often caused by insufficient contact area, resulting in poor contact and short circuit fault, which eventually burns out the transformer.