When conducting the power frequency withstand voltage test of dry-type transformers, the following points need to be noted:
1. Before testing, the insulation performance of the transformer should be checked to ensure that its insulation materials do not age, crack, or other phenomena. At the same time, check whether the wiring of the transformer is secure to avoid poor contact.
2. During testing, operations should be carried out in accordance with national standards and technical specifications to ensure the accuracy and reliability of the test. At the same time, safety operating procedures should be followed to prevent accidents from occurring.
During the testing process, attention should be paid to the temperature changes of the transformer to avoid the impact of overheating or undercooling on the test results. At the same time, attention should be paid to detecting the leakage current and insulation resistance of the transformer to ensure the accuracy of the test results.
After the test is completed, the test results should be analyzed and evaluated, and any problems found should be promptly addressed and repaired. At the same time, corresponding maintenance plans should be developed to ensure the long-term stable operation of the transformer.
In short, the power frequency withstand voltage test of dry-type transformers is an important link to ensure the safe operation of the power system. During the testing process, it is necessary to strictly follow safety operating procedures to ensure accurate and reliable testing. At the same time, analyzing and evaluating the test results, timely identifying and handling problems, can ensure the long-term stable operation of the transformer.
Dry Type Transformer
Function Characteristics:
1.Flame retardant, non-pollution, it can be installed directly in the load center.
2.Maintenance-free, easy to be installed, low operating costs.
3.The enclosure can be of Good moisture resistance, transformer can be put into operation without pre-drying under 100% humidity in the normal operation.
4.Low loss, light weight and small volume, low noise, good dissipation of heat, it can be 150% rated load operation under forced air cooling conditions.
5.Equipped with a complete temperature protection control system to provide reliable protection for the safe operation of
transformers.
6.High reliability. The results of checking for the products that has been put into operation show that the reliability index has reached the international advanced level.
Structural Characteristics:
Cast-foil Coil: Adopting the entire section of copper foil, together with the F-class turn insulation, low voltage winding is wound by the special low-voltage foil winding machine. The foil coil resolves such understanding problems as large short-circuit stress, uneven ampere turn, poor heat dissipation, existing the winding spiral angle as well as unsteady manual welding quality due to low voltage and large current coil winding products. At the same time, the winding end in our company is treated with resin potting, solidification to make shape, moisture-proof and anti-fouling, the lead copper platoon is automatically welded by argon arc welding.
