Product introduction:

Jn4-12 (g) type of indoor high-voltage grounding switch, is used in 12kV indoor metal armoured moving type metal closed switch equipment and other high voltage switch equipment of the main components can also be used alone. As in 12 kV and below 50Hz AC power system grounding protection, with closing short-circuit current capacity, reasonable structure, small volume, flexible operation, easy to install and adjust.

Use environmental conditions

- altitude 1000-3000m;

- ambient air temperature: +40, -25

- earthquake intensity is not more than 8 degrees;

-There is no fire, explosion hazard, severe dust, chemical corrosion and violent vibration

Technical parameters

Main technical parameters

Project

Unit Data

Rated current KV 12

Rated short-time withstand current KA 20

Rated short-time withstand S 4

Rated peak withstand current KA 50

Rated short-circuit curren KA 50

Polar center distance mm 230;  230;  250

Rated insulation leve 1min power frequency withstand voltage

KV 42

Lightning impulse withstand voltage

KV 75

Model specification

Type A B C

JN4-12G/20-210 752 210 682

JN4-12G/20-230 792 230 668

JN4-12G/20-250 832 250 708