JN15A-12/31.5 Indoor High Voltage AC Grounding Switch – 12kV Earth Switch for MV Switchgear Protection (Without Sensor)

JN15A-12/31.5 Indoor High-Voltage AC Earthing Switch (12kV)

Product Overview

The  JN15A-12/31.5 is an advanced indoor high-voltage grounding switch designed for 3-12kV three-phase AC 50Hz power systems. Engineered with high-tech parameter performance, this switch provides a critical short-circuit making capacity to protect expensive electrical equipment from damage. It is an essential safety component for medium voltage (MV) switchgears and switching stations, playing a vital protective role during high-voltage electrical equipment overhauls.

Core Features & Technical Advantages

• International Standard Compliance: Fully evaluated and compliant with GB1985 and IEC62271 standards for global industrial use.

• Superior Protection: Features a robust short-circuit making capacity, ensuring safety for the entire power system during fault conditions.

• Reliable Mechanical Life: Built for long-term durability with a mechanical life rated for significant operational cycles.

• High Insulation Level: Boasts a rated power frequency withstand voltage of 42kV and a lightning impulse withstand voltage of 75kV.

• Rugged Construction: Designed as a sensorless (without sensor) model for simplified integration into various high-voltage switchgear types.

Technical Specifications

Standard Working Conditions

To ensure optimal performance and safety, the following conditions must be met:

• Ambient Temperature: Reliable operation between -10°C and +40°C.

• Altitude: Suitable for installations at altitudes not exceeding 1,000 meters.

• Humidity Limits: Daily average relative humidity $\le$ 95%; monthly average $\le$ 80%.

• Pollution Degree: Classified as Class II (II 级).

• Environment: Must be free from conductive dust, corrosive gases, severe vibration, and explosive risks.