For the transformer, the ability to withstand earthquake disasters near its installation environment is very important for the safe use of the transformer, especially the ability to withstand small-probability large earthquakes. Therefore, for some countries with frequent crustal movement, the seismic design of transformers is very necessary.
POSSIBLE TRANSFORMER PROBLEMS CAUSED BY EARTHQUAKE
- Failure connected with the transformer moving from the site.
- Failure connected with core-coil shifting inside the tank.
- Failure connected with the destruction of HV bushing outer porcelain covers
- Failure connected with complete unit's failure
FACTORS TO BE CONSIDERED IN THE ANTI-EARTHQUAKE DESIGN
Firstly, the engineers will design the anti-earthquake transformers according to different standards, like standard ETG-1020/ETG.A.020, IEEE693-2005, etc. for Chile. Besides, they will consider many factors like liquid oscillation frequency, the earthquake intensity, etc. The anti-earthquake design is not specially for one accessory, but for a series of accessories like bushings, tank and some special anti-earthquake device. Even the material and the connection type of every part of transformer should be considered carefully. The cooperation of the design of different parts of transformer can make the anti-earthquake effect better.
If the seismic calculation report is necessary for clients, we also can provide this report as a description of the anti-earthquake ability of our transformers.