Dry-type transformer protection setting specification

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Dry-type transformer protection setting specification

Time: 07-30 2020    Auther: Ztelec group

Dry-type transformers also need to be protected, so that dry-type transformers will operate more safely and smooth...

Dry-type transformers also need to be protected, so that dry-type transformers will operate more safely and smoothly. There are many protection methods for dry-type transformers. Under normal circumstances, the protection of dry-type transformers must be regulated. So how are the protection methods of dry-type transformers regulated?

1. Gas protection

Gas protection refers to a protection that causes the protected transformer to trip directly when the dry-type transformer has an internal short circuit (including inter-turn short circuit), but the short-circuit current does not reach the current protection setting. It belongs to the main protection of Baoding dry-type transformers and cannot be removed during normal operation. Transformers are classified into light and heavy situations according to the operating pressure of the gas relay. Heavy gas acts on tripping, and light gas can act on tripping or signals according to the situation.

2. Temperature protection

That is, the temperature of the winding is measured by the temperature controller, and the over-temperature alarm and over-temperature trip signals are sent out according to the preset settings. Baoding dry-type transformers are generally equipped with two levels of temperature protection: low temperature alarm and high temperature trip. The specific temperature value can be set Follow the instructions of the transformer manufacturer.

3. Indoor protection of dry-type transformers

We need to prevent small animals such as rats and snakes from entering. Generally, these animals entering the transformer will cause a short circuit of the circuit, and even higher danger. So we can use IP20 protective protective shell for protection.

4. Outdoor protection of dry-type transformers

Is mainly to prevent rainwater from entering. In the case of the protective case, we also need to adjust the angle of the transformer to prevent water from entering. But now there are professional outdoor protective enclosures. In the specific protection work, we have to make judgments according to the different environments, and we should try to avoid harsh environments to avoid reducing the performance of the transformer.

The above are the main protection specifications and types of common dry-type transformers.

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