Transformers are the main components that transmit electrical energy and are key equipment in power transmission and transformation systems. Their operating status directly affects the reliability and safety of the power system. Once a transformer malfunctions during operation, it will have serious consequences for the power system. Therefore, it is necessary to use a core grounding current tester product to regularly detect the live current of the transformer's core grounding to prevent faults from occurring

The detection principle is that when the transformer is running with power, the current circuit will not form in the iron core, so the grounding current is very small, usually within tens of mA; When multiple grounding points occur, there is a situation where the main magnetic flux around the iron core is equivalent to a short-circuit turn, and the current on the grounding wire will significantly increase. The size of the circulating current flowing through it depends on the relative position of the clapping point and the normal grounding point. By measuring the current in the lead wire of the transformer iron core, it can effectively determine whether there is a phenomenon of multiple grounding points in the transformer iron core