Medium-voltage Indoor Grounding Switch

What is a Medium-voltage Indoor Grounding Switch?

The JN15-12 Medium-voltage Indoor Grounding Switch is a core component of modern indoor switchgear, designed and supplied by Wzonpa, a trusted China manufacturer and supplier of medium-voltage electrical solutions. This grounding switch provides a secure and visible earth connection for isolated high-voltage circuits in indoor switchgear panels such as KYN28A-12, XGN2-12, and XGN15-12. As a high-quality component, it ensures safe operation, seamless integration, and compliance with stringent electrical safety standards.

The Medium-voltage Indoor Grounding Switch is built with a three-pole, common-shaft construction for synchronous operation, enabling all three phases to be grounded simultaneously. Its durable contacts and spring-assisted quick-make and quick-break mechanism guarantee consistent switching regardless of manual operation speed, making it a dependable solution for electrical grid protection.

Key Features and Advantages

1.Core Advantages

Reliable Short-Circuit Withstand: Rated short-time withstand current up to 31.5kA ensures grid stability.

Fail-Safe Mechanical Interlock: Prevents operation unless the main disconnector is open, eliminating human error risk.

Long-Lasting Mechanical Endurance: Over 2000 operations without maintenance, thanks to precision engineering.

Visible Operation: Clear "OPEN/CLOSE" indication and a robust CS-series handle for manual control.

2.Design Highlights

Three-pole, common-shaft synchronous design

Silver-plated copper contacts for low resistance and superior thermal conductivity

Compact and vibration-resistant base frame

Optional auxiliary switches for remote monitoring of switch position

Working Conditions

Ambient Temperature: -10°C to 40°C

Altitude: Below 1000 meters

Relative Humidity: Daily average <95%, Monthly average <90%

Seismic Intensity: Below Degree 8

Pollution Degree: II

Product Applications

The Medium-voltage Indoor Grounding Switch is suitable for a wide range of indoor switchgear in power distribution systems. Typical applications include:

Safety grounding for feeder circuits, busbar sections, and transformer inlets

Integration into fixed or withdrawable switchgear panels

Industrial power systems and utility substations

This grounding switch ensures maintenance safety for 12kV electrical equipment, providing a standardized, reliable earthing solution.

Quality Assurance and Certification

Manufactured in Wzonpa's China factory under strict quality control

Compliance with IEC 62271-102 standards for medium-voltage switchgear

Tested for mechanical endurance, short-circuit capacity, and insulation performance

Visual inspection and factory production line testing ensure consistent reliability

Comparison and Why Choose Wzonpa

Compared to competitors, Wzonpa’s Medium-voltage Indoor Grounding Switch offers:

Higher short-circuit withstand current

Precision mechanical interlocking preventing operational errors

Superior durability and longer operational life

Compact design suitable for multiple switchgear types

Choosing Wzonpa guarantees trusted performance, manufacturing expertise, and reliable post-sale support.

Appearance and installation dimensions

Technical parameters

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