JN15-12/31.5 Indoor Earthing Switch 3 12kV AC 50 60Hz HV Switchgear Protection

The JN15-12/31.5 Indoor Earthing Switch is engineered for 3-12kV AC power systems operating at 50-60Hz. It provides reliable earthing, modular integration, and high-voltage switchgear protection. Designed for industrial and utility applications, it ensures safe maintenance, fault isolation, and personnel safety, improving operational reliability in medium-voltage indoor switchgear systems.

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Product definition

Indoor High Voltage Earthing Switch

Working Condition

Ambient temperature:-10°C-+40°C;
Altitude: ≤1000m;
Relative humidity: Daily average ≤ 95%,
Monthly average ≤ 90%
Earthquake intensity:≤ 8 degree;
Dirtiness degree: ll.

Technical Parameters

No.	Item		Unit	Data
1	Rated voltage		KV	12
2	Rated short time withstand current		KA	31.5
3	Rated short circuit withstand time		S	4
4	Rated short circuit making current		KA	80
5	Rated peak withstand current		KA	80
6	Rated insulation level	1min power frequency withstand voltage	KV	42
6	Rated insulation level	Lightning Impulse withstand voltage	KV	75
7	Mechanical life		TIMES	2000

Installation drawing and hole location diagram

Indoor High Voltage Earthing Switch

Specification	E	F	G	H	D	C
EK15-12/31.5-165	165	75	160	565	426
EK15-12/31.5-180	180	75	160	595	456
EK15-12/31.5-200	200	75	160	635	496
EK15-12/31.5-210	210	75	160	655	516
EK15-12/31.5-220	220	75	160	675	536
EK15-12/31.5-230	230	75	160	695	556	96
EK15-12/31.5-250	250	75	160	735	596	96
EK15-12/31.5-275	275	75	185	810	646	96