As a professional manufacturer, supplier, and factory, Wzonpa delivers the JN15-12 Medium-voltage Indoor Earthing Switch engineered for modern power distribution systems. Designed for seamless integration with indoor metal-clad switchgear, it ensures visible, secure grounding and enhances operational safety across substations and industrial networks.
The Medium-voltage Indoor Earthing Switch is a critical safety component used to ground isolated high-voltage circuits. It forms a reliable connection to earth, protecting personnel and equipment during maintenance.
High Short-Circuit Performance
Rated short-time withstand current up to 31.5kA
Ensures grid stability under fault conditions
Fast and Stable Operation
Spring-assisted quick-make and quick-break mechanism
Independent of manual operating speed for consistent performance
High Mechanical Durability
Mechanical life exceeding 2000 operations
Precision manufacturing for long-term reliability
Fail-safe Interlocking System
Prevents incorrect operation unless disconnector is open
Eliminates human error and improves safety compliance
Power Distribution Systems
Suitable for 12kV indoor switchgear assemblies
Switchgear Integration
Compatible with KYN28A-12, XGN2-12, XGN15-12 panels
Industrial and Substation Use
Suitable for feeder circuits, busbars, and transformer inlets
Unique Advantages Compared to Similar Products
Three-pole common shaft ensures synchronous grounding
Silver-plated contacts reduce resistance and heat
Clear position indicators for safe operation
Optional auxiliary switches for remote monitoring
The Medium-voltage Indoor Earthing Switch operates through a manual or spring-assisted mechanism that drives a three-phase linkage system. When activated, all poles close simultaneously, creating a direct grounding path. Mechanical interlocking ensures operation only under safe conditions.
| Item | Units | Data | |
| Rated voltage | kV | 24 | |
| Rated short time withstand current | kA | 31.5 | |
| Rated short circuit withstand time | S | 4 | |
| Rated short circuit making current | kA | 80 | |
| Rated peak withstand current | kA | 80 | |
|
Rated insulation level |
1min power frequency withstand voltage |
kV | 65 |
|
Lightning Impulse withstand voltage |
kV | 95 | |
| Mechanism life | time | 2000 | |
Q1: What is the main function of a Medium-voltage Indoor Earthing Switch?
It provides a safe grounding path for isolated circuits, protecting both equipment and maintenance personnel.
Q2: Why is mechanical interlocking important?
It prevents unsafe operations by ensuring the switch cannot close unless conditions are safe, reducing risk of accidents.
Q3: How long is the service life of this earthing switch?
With over 2000 mechanical operations, it offers long-term, maintenance-free performance.
Q4: Where is this earthing switch commonly installed?
It is widely used in indoor switchgear systems within substations and industrial power distribution networks.
Choose Wzonpa Medium-voltage Indoor Earthing Switch for dependable safety and performance. Contact our factory today for competitive pricing, fast delivery, and consistent quality assurance.
Address
No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
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