No partial discharge test transformer

Non partial discharge test transformer, as the name suggests, refers to a transformer that does not produce partial discharge during the testing process. Partial discharge refers to the phenomenon of electric spark discharge caused by internal defects or damage of electrical equipment under high voltage. Partial discharge not only causes equipment damage, but may also lead to fires or other power failures, seriously endangering the safe operation of the power system. Therefore, the use of test transformers is of crucial importance in ensuring the stability and safety of the power system.

The working principle of the test transformer mainly includes two aspects: firstly, it can provide high-quality AC power, enabling the tested equipment to conduct tests under real working conditions. Secondly, the experimental transformer can effectively suppress the occurrence of partial discharge under high voltage by adopting special design and materials. Through the working principles of these two aspects, the test transformer can provide a stable, reliable, and safe testing environment, ensuring that the performance and quality of the tested equipment meet the specified standards.

In the power system, test transformers play an important role. Firstly, it is used to test newly built electrical equipment during the production process to verify its performance and reliability. These devices may include transformers, circuit breakers, insulators, etc. Secondly, the test transformer is also used for routine inspections during on-site operation and maintenance to monitor the status and performance of the equipment and promptly identify potential issues. By conducting regular non partial discharge tests, equipment failures can be prevented, the service life of equipment can be extended, and the reliability and stability of the power system can be improved.

Test transformers are essential equipment in power systems, and their existence and use are crucial for ensuring the quality and reliability of power equipment. By providing a high-quality testing environment and suppressing the occurrence of partial discharge, the test transformer plays an important role in ensuring safe operation in the power system. In the future, with the development of the power system and the increasing demand, test transformers will continue to play an important role and continuously improve their technical level to meet the safety and reliability requirements of the power system.

Technical parameters of transformer without partial discharge test:

1. Partial discharge capacity (insulated cylinder type)

A. 10-200KV rated voltage (UH), local discharge capacity ≤ 3-5Pc at 100% UH

B. 250-300KV rated voltage (UH), local discharge capacity ≤ 5Pc at 100% UH

C. 350-750KV rated voltage (UH), local discharge capacity ≤ 5Pc at 80% UH, ≤ 10Pc at 100% UH

D. 800KV~1500KV rated voltage (UH), local discharge capacity ≤ 10Pc at 80% UH

2. Cascade test transformer, uneven voltage distribution between two or three sections ≤ 5%

3. Allowable operating time: The test transformer can run for 30 minutes from ambient temperature at rated voltage and current, and can run continuously at two-thirds of the rated voltage and current

4. The impedance of a single test transformer is 3% to 12%, and the impedance of a series connection is 5% to 25%

5. Waveform distortion rate<3%

6. The remaining parameters comply with the provisions of JB/T9641-1999<<Test Transformer>>

Selection parameters: