Lightning impulse test on distribution transformer

Since distribution transformers  are exposed to various environmental factors and potential electrical disturbances, they must be tested according to standards and buyer's specifications to ensure their reliability, safety and performance. One of the key tests is the lightning shock test, which is designed to assess the transformer's ability to withstand high-voltage lightning surges and protect the distribution network from outages.

Lightning impluse test is an important test for oil-immersed transformer  before it is put into operation. Its main purpose is to evaluate the insulation strength and resistance of the transformer under lightning attack.

Lightning test is essential to ensure the safety and reliability of the transformer in actual operation for the following reasons:

1. Evaluate insulation strength of transformer

2. Check the quality of manufacturing and assembly 

3. Improve the safety of transformer operation
4. Meet standards and specifications
 

In short, the lightning shock test of the oil-immersed transformer is not only to verify the reliability of its insulation system under extreme conditions, but also to ensure its safety and long-term stability in actual operation. This test is crucial for the application of transformers in power systems to effectively prevent equipment failures and power outages caused by lightning strikes.