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Methods for Handling Transformer Failures

Release time:

2024-12-26

The guidelines for handling transformer tripping are as follows: when a transformer trips, stop and check according to the on-site procedures. Analyze the maintenance actions and the phenomena at the time of the incident, assess the situation, and proceed with handling. If both gas protection and differential protection trip simultaneously, do not restore power until the cause is clearly identified and the issue is resolved.

The guidelines for handling transformer tripping: when a transformer trips, stop and check according to the on-site regulations, analyze the maintenance actions and the phenomena at the time of the incident, determine the accident situation, and cease handling. If gas maintenance and differential maintenance trip simultaneously, do not restore power until the cause is clarified and the problem is resolved.

When the transformer differential maintenance trips simultaneously, inspect the external part of the main transformer, notify the relevant personnel from the work area, maintenance, and relay departments to rush to the site. Stop checking the primary and secondary circuits of the transformer, cease measuring the oil and gas properties of the transformer, and after conducting tests such as DC resistance and insulation, if it is confirmed that there are no issues with the transformer and its maintenance control circuit, a strong power restoration can be attempted once. In urgent system needs, after checking the external part of the main transformer and insulation tests with no abnormalities, a trial power restoration can be attempted once with the approval of the chief engineer. After the transformer gas maintenance action trips, a trial power restoration can only be conducted if it is proven that the gas maintenance was a false action or there are no issues inside the transformer.

When the transformer overcurrent maintenance action trips, an inspection and analysis of the transformer and its load conditions, as well as the maintenance action status of the outgoing lines, should be conducted. If the trip is caused by a transient issue, inspection may not be necessary. After disconnecting the problematic outgoing line switch, power can be restored to the transformer, and the non-problematic outgoing lines should be restored one by one, notifying the work area for testing and inspection.

2024-12-26

Understanding the principle of a transformer involves grasping how it transfers electrical energy between two or more circuits through electromagnetic induction. A transformer typically consists of two coils of wire, known as the primary and secondary windings, wrapped around a core made of magnetic material. When an alternating current (AC) flows through the primary winding, it creates a magnetic field that induces a voltage in the secondary winding. The ratio of the number of turns in the primary and secondary windings determines whether the transformer steps up (increases) or steps down (decreases) the voltage. This principle is fundamental in electrical engineering and is widely used in power distribution and various electronic devices.

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