Nuclear power station transformer gas relay seismic test method

Abstract

The invention discloses a nuclear power station transformer gas relay seismic test method which includes the following process: conducting frequency conversion test which includes that relays are filled with transformer oil, an indication device is connected at a tripping point and arranged on a vibration table with the vibration test frequency as 8-20Hz sweep frequency, the frequency is maintained for 1 minute respectively on the X axis, the Y axis and the Z axis, the acceleration is over 0.25g, and an indication result of the indication device is recorded. By means of the nuclear power station transformer gas relay seismic test method, the anti-seismic performance of gas relays of various types is tested and evaluated, and the method can provide support for type selection of the transformer gas relays. Due to the fact that the gas relays are installed on a transformer, it is unreasonable to put forward an anti-seismic requirement or standard from the view point of the gas relays singly, and the anti-seismic requirement is put forward from the view point of the whole transformer. On the type selection of the transformer gas relays, the production safety requirement can be met as long as the anti-seismic parameters are not lower than the anti-seismic requirement of a main body transformer.

Description

【Technical field】

[0001] The invention relates to a power transformer, in particular to a gas relay therein. 【Background technique】

[0002] The gas relay is one of the important components in the non-electrical protection of power transformers. It is generally installed between the transformer body or the on-load tap-changer and the oil conservator. When a fault occurs inside the transformer body or on-load tap-changer, gas or rapid oil When the current surges, the gas relay acts through the light and heavy fault contacts to connect the designated control circuit, and send a signal in time or automatically cut off the transformer.

[0003] When the transformer is subjected to external through-circuit short-circuit current or no-load impact, the Buchholz relay may be affected by the overall vibration of the transformer, or it may be directly subjected to vibration under the action of an external force such as an earthquake, which may cause the Buchholz relay to malfunction, ...

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