Grounding knowledge sharing

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Why must current transformers be grounded? It is designed to ensure safety, namely equipment safety and personal safety. This is because there are distributed capacitances between the primary and secondary windings of the current transformer, as well as between the secondary winding and ground. Thus, the voltage division caused by this distributed capacitance generates a higher voltage across the secondary windings. Another scenario is when the insulation between the primary winding and the secondary winding is damaged for some reason; in such a case, the high voltage from the primary circuit will be applied directly to the secondary circuit, posing a serious threat to the safety of the secondary equipment and human beings. Therefore, the secondary side of the current transformer must be grounded, and there must be only one grounding point in the secondary circuit; multiple grounding points are not allowed.