Earth Switch in Switchgear

The earth switch in switchgear JN22-40.5/31.5 is a specific indoor high-voltage grounding switch designed for use in 40.5kV-rated electrical systems. Its core function is to provide a reliable, visible earth (ground) connection for isolated high-voltage circuits or equipment. This ensures personnel safety during maintenance or fault conditions by discharging residual energy and preventing accidental re-energization.

     JN22-40.5/31.5

• JN22: Model designation (J = Grounding Switch, N = Indoor, 22 = Design series).
• 40.5: Rated voltage of 40.5 kilovolts (kV). It's used in systems typically operating at 35kV (derated per standard practice).
• 31.5: Rated short-time withstand current (short-circuit current) of 31.5 kiloamperes (kA). This defines its ability to safely carry extreme fault current for a specified duration (usually 2-4 seconds) without damage.

GB1985-2004 AC high-voltage disconnectors and earthing switches

IEC62271-102:202

The earth switch in switchgear is commonly integrated as a critical safety component within indoor metal-enclosed switchgear (e.g., KYN61-40.5) for high-voltage substations and industrial power distribution.

If customers require the switch cabinet housing to be assembled with components such as the grounding switch in this article, we can install them free of charge.

When ordering this product, please specify:

1. Product model, rated voltage, rated short-time withstand current, phase spacing, and operating position (left or right);
2. Whether a live indicator is included;
3. Any special requirements will be addressed through consultation with our company.