JN15-24/31.5 indoor high-voltage grounding switch is a new type of grounding switch with international advanced level designed and developed by our company based on the prototype of ES1 grounding switch. The structural form is assembly type, and its performance meets the requirements of GB1985-2004 AC High Voltage Isolation and Grounding Switches and IEC129. It is suitable for indoor 24kV three-phase AC 50 (60) Hz power systems. It has a certain closing ability to protect other electrical equipment inside the switchgear from damage, and can be used in conjunction with various high-voltage switchgear as a grounding protection for high-voltage electrical equipment maintenance.