JN22B-40.5 Indoor Grounding Switch for 40.5kV Switchgear
JN22B-40.5 Indoor Grounding Switch for 40.5kV Switchgear is designed for safe grounding and isolation operations in 40.5kV medium-voltage switchgear systems. It provides a reliable grounding path during equipment maintenance, inspection, and fault handling, helping improve operational safety and prevent incorrect switching operations. With a robust mechanical structure, reliable interlocking design, and strong short-circuit withstand capability, the JN22B-40.5 is widely used in indoor substations, metal-clad switchgear, industrial power distribution systems, and power plant electrical equipment.
Get a QuoteOverview
The JN22B-40.5 indoor high-voltage grounding switch is designed for safe and reliable grounding operations in 40.5kV power distribution systems. It is commonly installed in metal-clad switchgear and indoor gas-insulated equipment, providing a secure grounding path for maintenance work, equipment protection, and fault handling.
Featuring a visible grounding position indication and mechanical interlocking design, the JN22B-40.5 helps prevent incorrect operation and enhances personnel safety during electrical maintenance activities. It is widely used in medium-voltage substations, industrial switchgear systems, and power plant control facilities where reliable isolation and grounding performance are required.
With a robust mechanical structure and dependable operating performance, the JN22B-40.5 meets the requirements of modern medium-voltage power systems and supports safe operation in accordance with applicable industry standards.
Typical Applications
The JN22B-40.5 indoor high-voltage grounding switch is widely used in 40.5kV medium-voltage switchgear systems, providing reliable grounding and safety protection during equipment maintenance and power system operation.
Medium-Voltage Switchgear Applications
The grounding switch is suitable for installation in metal-clad switchgear such as KYN61-40.5 and XGN2-40.5, providing a secure grounding connection and mechanical interlocking function for air-insulated switchgear systems.
Power Plants and Industrial Facilities
In industrial power systems and power generation facilities, the JN22B-40.5 helps ensure maintenance safety by providing a reliable grounding path during scheduled shutdowns, equipment inspection, and repair operations.
Distribution Substations
With its compact structure and flexible installation design, the grounding switch can be integrated into indoor distribution equipment, RMU systems, and GIS switchgear compartments, providing an effective grounding solution for urban power networks.
Key Advantages of JN22B-40.5
Reliable Mechanical Safety Interlocking
The JN22B-40.5 features a mechanical interlocking system that prevents incorrect operation and helps avoid grounding actions under unsafe energized conditions, improving operational safety.
Compact and Adaptable Structure
Designed specifically for 40.5kV switchgear applications, the grounding switch features a compact layout that allows easy integration into existing switchgear compartments without major structural modifications.
High Short-Circuit Withstand Capability
The grounding switch provides strong short-circuit withstand performance, with a peak withstand current capability of up to 80kA, ensuring reliable operation under fault conditions.
Smooth and Reliable Manual Operation
The spring-assisted operating mechanism enables fast and stable manual operation, reducing operating effort while ensuring secure grounding performance.
Technical Data
| Item | Unit | Parameter | |
| Rated voltage | kV | 40.5 | |
| Rated Current | A | 1250 / 1600 / 2000 | |
| Rated Short-Circuit Current(4s) | kA | 31.5 | |
| Rated Short-Circuit Closing Current(peak) | 80 | ||
| Withstand Voltage (1 min) | AC | kV | 95 |
| Lightning Impulse | 185 | ||
| Operating Mechanism | / | Manual spring | |
| Mechanical Life | Times | ≥ 2000 | |
| Mounting Method | / | Horizontal in the switchgear compartment | |
| Compliance | / | GB 1985, IEC 62271-102 | |
Why Choose JN22B-40.5
Enhanced Operational Safety
The JN22B-40.5 is equipped with a reliable mechanical interlocking system that helps prevent incorrect switching operations. The interlock design improves operating safety by avoiding improper grounding actions when the equipment is energized.
Compact Installation Design
With an optimized structural layout, the grounding switch is specially designed for 40.5kV switchgear compartments. Its compact configuration allows convenient integration into existing switchgear systems without requiring major structural modifications.
High Short-Circuit Withstand Performance
The JN22B-40.5 provides excellent short-circuit withstand capability, with a peak withstand current of up to 80kA. This ensures reliable grounding performance and enhanced protection under fault conditions.
Reliable Manual Operating Mechanism
The spring-assisted operating mechanism provides smooth and efficient manual operation, reducing operating effort while ensuring fast, secure, and stable grounding during maintenance procedures.
