The methods,including the testing method to determine original winding turns on site by tem porary winding and the method to determine winding turns on site by tap turns,are intro-duced before repairing windings in transformer.

• 介绍了在变压器绕组故障维修前用外加临时绕组测试法和利用分接抽头匝数在现场确定绕组匝数的方法。