There are two ways to ground the transformer core, namely direct grounding and bushing lead grounding. Direct grounding is to extend one end of the tinned copper sheet between the laminations of the iron yoke. When the iron yoke is compressed, it becomes a dead end. The other end is bolted to the upper and lower iron yoke clamp irons. The yoke clip is in direct contact with the fuel tank, and the fuel tank is grounded. In the case of the hanging cover (hanging core), the insulation of the measuring iron core can be disassembled at any time. The grounding of the bushing leads to the need of measuring the dielectric loss angle of the coil when the large power transformer is live. The iron yoke clip is insulated from the fuel tank. After the iron core is connected to the iron yoke clip with a copper sheet, the insulated lead is used to install it from the The small insulating sleeve at the lower part of the fuel tank is led out, and then grounded outside the fuel tank. At this time, the iron core part of the power transformer is insulated from the oil tank. Source: Internet Author: Unknown
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