JN15-12/D31.5 Motorized Indoor High Voltage AC Earthing Switch – 12kV Electric Grounding Switch with Fast Closing Mechanism for Medium Voltage Switchgear
The JN15-12/D31.5 is an advanced motorized indoor high-voltage earthing switch designed for 12kV three-phase AC 50Hz power systems. Fully compliant with GB1985 and IEC62271 standards, this model features an integrated electric motor drive to support remote operation and automation in modern distribution networks. It possesses a reliable short-circuit making capacity to protect vital electrical equipment from damage during fault conditions. Built with high-performance resin insulators and silver-plated electrolytic copper contacts, it ensures superior conductivity and long-term reliability for medium-voltage switchgear maintenance.
JN15-12/D31.5 Motorized Indoor AC High Voltage Earthing Switch (12kV)
Product Overview
The LYE102 JN15-12/D31.5 is an advanced-level motorized earthing switch designed for 12kV three-phase AC 50Hz power systems. This model represents a significant upgrade in automation, allowing for a seamless transition between manual and electrical operation without altering the original switchgear installation structure. Fully compliant with GB1985 and IEC62271 standards, it is a critical safety component used in medium-voltage switchgear to provide reliable grounding during equipment overhaul and protection during system faults.
Core Features & Technical Advantages
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Dual Operation Modes: Offers the flexibility to switch freely between manual and electrical operation, making it ideal for both traditional and automated smart grid environments.
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High-Speed Closing Mechanism: Equipped with a pressure spring energy storage system where the closing speed is completely independent of the operator’s manual speed or the motor’s drive speed, ensuring consistent and reliable contact.
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Enhanced Safety & Control: Features a built-in conversion prevention function to protect the motor during operation and includes a clear mechanical indicator (Green “O”) for visual status verification.
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Premium Conductivity: Utilizes 99.9% silver-plated electrolytic copper live parts on resin insulators, guaranteeing low ohmic resistance and a high current-carrying capacity.
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Plug-and-Play Integration: Features a pluggable terminal block for easy wiring and a simple installation process that preserves the original switchgear design.
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Robust Fault Protection: Possesses a powerful 80kA short-circuit making capacity to safeguard electrical assets from catastrophic damage during fault conditions.
Technical Specifications
| Item | Unit | Data |
| Rated Voltage | kV | 12 |
| Rated Short-time Withstand Current | kA | 31.5 |
| Rated Short-circuit Duration | s | 4 |
| Rated Short-circuit Making Current | kA | 80 |
| Rated Peak Withstand Current | kA | 80 |
| PF Withstand Voltage (1 min) – Earth | kV | 42 |
| Lightning Impulse Withstand Voltage | kV | 75 |
| Mechanical Endurance | cycles | 2000 |
Standard Operating Conditions
To maintain optimal performance and longevity, the following site conditions should be observed:
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Altitude: 1,000 meters.
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Ambient Temperature: -25°C to +40°C.
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Relative Humidity: Daily average ≤95%; monthly average ≤ 90%.
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Seismic Resistance: Up to 8 degrees earthquake intensity.
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Pollution Degree: Classified as Class II.
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