Forced earth potential device of open-loop current sensor on high-voltage equipment

The utility model aims to provide a device for protecting safety of equipment such as an online monitoring system or operation test system and the like on the precondition of not changing electrical equipment of a substation or greatly increasing installation workload, namely a forced earth potential device of an open-loop current sensor on high-voltage equipment. The forced earth potential device is characterized by comprising a copper bar, an insulating rubber sleeve, a metal potentiometer and an open-loop current sensor. The copper bar has a width H and an arbitrary value of length. The insulating rubber sleeve sleeves the copper bar. Insulating mud is filled between the insulating rubber sleeve and the outer surface of the copper bar. The metal potentiometer is an aluminum sheet bent into a U shape. The metal potentiometer wraps the insulating rubber sleeve. Insulating mud is filled between the metal potentiometer and the insulating rubber sleeve. The metal potentiometer is grounded. The open-loop current