Journal of Electrical Engineering and Automation

The grounding mode of transformer core and clamp is directly related to the safe operation of transformer. In recent years, many transformer cores have been found in substations, and the grounding of the clamps is caused by insulation from the oil tank shell to the main grounding grid, which has changed the way of special grounding through the lower part of the tank. In this paper, the structure and function of transformer core and clamp are analyzed, and the influence of two different grounding modes on the safe operation of transformer is discussed. Thus, it is clear that the way of insulation from the oil tank to the main ground grid will affect the safe operation of the transformer; The correct connection method should be the iron core, the clamp through the lower part of the special contact point grounding.

transformer; core; clamp; Grounding mode