JN17-12/40 Indoor High Voltage Earthing Switch 3 10kV AC 50 60Hz Improved ES1 Type

The JN17-12/40 Indoor High Voltage Earthing Switch is designed for 3-10kV AC power systems, supporting 50-60Hz operation. Its improved ES1 type ensures reliable earthing, modular switchgear integration, and enhanced safety. Ideal for industrial, commercial, and utility applications requiring medium-voltage earthing, fault protection, and efficient indoor high-voltage switchgear operation.

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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
JN17-12/40-210	210	50	185	655	516
JN17-12/40-220	220	50	185	675	536
JN17-12/40-230	230	50	185	695	556
JN17-12/40-250	250	50	185	735	596
JN17-12/40-275	275	50	210	810	646