备用变压器
The testing voltage of the secondary winding of transformer has to be80% stipulated testing voltage while repeated power frequency voltage with-stand test needed.
互感器一次绕组的重复工频耐压试验应在规定试验电压值的80%下进行。
feasibility analyses of the change from high voltage stand-by transformer to the automatic one in power plant
电厂高压备用变压器改自投备用可行性分析
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