Product Overview
The JN22-40.5 Indoor High-Voltage Earthing Switch is a professional indoor high-voltage electrical device designed in compliance with international standards IEC 129-84 and IEC 694-84.
It is engineered for 35kV and below three-phase AC 50Hz power systems, and comes with a built-in voltage monitoring device. With a simple and reliable structure, low operating force, and easy installation and commissioning, it is typically integrated into JYN1-40.5 and GFC-40.5 switchgear cabinets, and can also be used independently. It provides a secure earthing circuit for maintenance, protecting personnel and equipment from residual voltage and accidental re-energization.
Core Features
- Standard Compliance: Fully compliant with IEC 129-84, IEC 694-84, ensuring global recognition and reliable performance.
- Built-in Voltage Monitoring: Integrated voltage monitoring device prevents operation under live conditions, eliminating misoperation risks.
- Low Operating Force: Precision mechanical transmission enables smooth, low-effort manual operation, reducing fatigue during frequent use.
- Reliable & Durable: Epoxy resin insulation pillars offer excellent insulation and mechanical strength, with a mechanical life of ≥1000 operations.
- Easy Installation: Modular design and standardized mounting interfaces enable quick integration into switchgear or standalone use.
- Dual Application: Seamlessly integrates with JYN1-40.5 and GFC-40.5 switchgear, or functions as a standalone earthing protection device.
Technical Parameters
| Parameter |
Specification |
| Rated Voltage |
40.5kV (suitable for ≤35kV systems) |
| Rated Frequency |
50/60Hz |
| Short-Time Withstand Current |
40kA (4s) |
| Peak Withstand Current |
100kA |
| Operation Mode |
Manual |
| Voltage Monitoring |
Integrated voltage sensing device |
| Insulation Resistance |
≥1000 MΩ |
| Certifications |
IEC 129-84, IEC 694-84 |
Application Scenarios
- Integrated protection for JYN1-40.5 and GFC-40.5 high-voltage switchgear
- Maintenance earthing for 35kV power distribution substations and industrial plants
- Standalone earthing for capacitor banks and transformer maintenance
- Power grid retrofit projects requiring reliable medium-voltage earthing protection
- Indoor applications in data centers, new energy stations and manufacturing facilities
Installation & Maintenance
- Mounting: Install vertically in the switchgear cabinet, ensuring the earthing busbar connection is secure and ground resistance ≤1Ω.
- Daily Inspection: Regularly check insulation pillars for contamination or damage, and verify tightness of all fasteners.
- Operation Note: Only perform switching operations after confirming the system is de-energized via the voltage monitoring device.
- Lubrication: Apply silicone grease to rotating joints every 6 months to maintain smooth operation.