The JN15-24 Indoor AC High Voltage Earthing Isolation Switch is a reliable 24kV switchgear component designed for safe grounding and isolation in medium and High Voltage systems. Engineered for durability, safety, and efficiency, it ensures system protection and reliable indoor power distribution in industrial, utility, and commercial applications.

The 24kV Indoor AC High Voltage Earthing Isolation Switch JN15-24 is a key component in modern power distribution networks. It is designed to provide safe and efficient earthing and isolation in electrical systems operating at 24kV. As part of switchgear assemblies, the JN15-24 plays a vital role in ensuring operational safety, equipment protection, and uninterrupted power supply in medium- and high-voltage environments.

With the growing demand for reliable energy distribution, safe disconnection, and earthing mechanisms, the JN15-24 switch offers advanced engineering, robust construction, and long service life. It is widely applied in industrial plants, commercial buildings, utility substations, and power distribution facilities where safety, performance, and compliance with international standards are essential.

Key Features of JN15-24 Indoor AC High Voltage Earthing Isolation Switch

1. Rated Voltage: 24kV, suitable for medium- and high-voltage switchgear.

2. Rated Current: Designed to handle various operational loads reliably.

3. Earthing Function: Provides a secure connection to ground, ensuring operator safety and equipment protection.

4. Isolation Function: Enables safe disconnection of power circuits during maintenance or repair.

5. Three-Pole Design: Ensures balanced and efficient switching across three-phase AC systems.

6. Compact Structure: Designed for easy integration into switchgear cabinets without occupying excessive space.

7. High Mechanical Strength: Built from high-quality materials to withstand operational stresses.

8. Long Electrical Life: Capable of enduring multiple switching operations without performance degradation.

9. Indoor Application: Specifically designed for enclosed switchgear systems used indoors.

10. Compliance with Standards: Meets international IEC and GB standards for safety and reliability.

Technical Specifications of JN15-24

• Rated Voltage: 24kV

• Rated Frequency: 50/60Hz

• Rated Current: Up to 1250A (depending on configuration)

• Short-Time Withstand Current: 20kA – 31.5kA (1s)

• Peak Withstand Current: Up to 80kA

• Rated Short-Circuit Making Current: 50kA – 63kA

• Rated Earthing Current: 31.5kA

• Insulation Level:

• Power Frequency Withstand Voltage (1 min): 65kV

• Lightning Impulse Withstand Voltage: 125kV

• Mechanical Endurance: >2000 operations

• Mounting Method: Fixed, suitable for metal-clad switchgear

Functions of JN15-24 High Voltage Earthing Isolation Switch

1. Earthing Function

The JN15-24 provides a direct path to ground, ensuring the discharge of residual current in a circuit. This protects maintenance personnel from electric shock hazards and safeguards equipment from insulation breakdown or electrical faults.

2. Isolation Function

The switch isolates high voltage equipment from the live system. This function ensures that circuits are completely de-energized during inspection or maintenance, allowing safe working conditions.

3. Fault Protection

In case of a fault, such as short circuits, the switch assists in rapidly grounding the system, preventing damage to transformers, circuit breakers, and other Switchgear Components.

4. System Reliability Enhancement

By offering dependable disconnection and grounding, the JN15-24 contributes to the stability and continuous operation of the electrical distribution network.

Applications of JN15-24 Indoor AC High Voltage Earthing Isolation Switch

1. Industrial Facilities

• Steel plants, petrochemical industries, cement factories, and heavy manufacturing plants require reliable grounding and isolation to protect sensitive equipment.

2. Utility Power Distribution

• Widely used in medium voltage substations and distribution networks to safeguard transformers, vacuum circuit breakers (VCBs), and switchgear.

3. Commercial Buildings

• High-rise office buildings, shopping complexes, and data centers rely on JN15-24 switches for uninterrupted, safe power distribution.

4. Renewable Energy Systems

• Solar power plants and wind farms use these switches to connect, disconnect, and ground sections of power distribution systems safely.

5. Transportation Infrastructure

• Railways, airports, and metro networks use indoor AC earthing switches in their substations and control rooms to maintain reliable Power Systems.

Design Advantages

• Safety Interlocking Mechanism
  Prevents accidental closing or opening under load conditions, minimizing operator risks.

• Compact Design
  Space-saving structure enables installation in medium-sized switchgear cabinets.

• Corrosion-Resistant Materials
  Ensures durability in humid or challenging indoor environments.

• High Mechanical Reliability
  Long life expectancy with consistent performance under operational stress.

• Easy Maintenance
  Simple design allows for quick inspection, lubrication, and replacement if needed.

Installation and Maintenance Guidelines

Installation

1. Ensure the switchgear is de-energized before installation.

2. Mount the JN15-24 on a firm base inside the switchgear cabinet.

3. Verify alignment of the operating mechanism with the switch contacts.

4. Connect grounding cables securely to ensure proper earthing.

5. Conduct insulation resistance tests before energizing.

Maintenance

• Regularly inspect mechanical parts for wear and tear.

• Lubricate moving components periodically to reduce friction.

• Check insulation integrity using megger testing.

• Verify the closing and opening operation after prolonged idle periods.

• Ensure all interlocking mechanisms are functioning correctly.

Advantages of Using JN15-24 Earthing Isolation Switch

1. Enhanced Safety – Protects operators during maintenance.

2. System Protection – Prevents damage to transformers and circuit breakers.

3. Reliable Performance – Maintains efficiency in harsh electrical environments.

4. Long Service Life – Capable of enduring thousands of operations.

5. Cost-Effective – Reduces downtime and maintenance costs.

6. Standards Compliance – Meets international IEC/GB requirements for high voltage safety.

Compliance and Standards

The JN15-24 Indoor AC High Voltage Earthing Isolation Switch complies with:

• IEC 62271-102 – High-voltage alternating current disconnectors and Earthing Switches.

• IEC 60694 – Common requirements for high-voltage switchgear.

• GB 1985 – AC high-voltage disconnectors and earthing switches.

Future of Indoor AC high voltage switchgear components

As industries modernize, the demand for smart switchgear solutions is growing. The JN15-24 can be integrated with intelligent monitoring systems, enabling real-time diagnostics and predictive maintenance. This aligns with the future of Industry 4.0 and smart grid systems, where safety, reliability, and digital monitoring converge.

The 24kV Indoor AC High Voltage Earthing Isolation Switch JN15-24 is a robust, safe, and efficient solution for medium- and high-voltage power distribution networks. Its strong design, compliance with international standards, and long operational life make it a preferred choice for industries, utilities, and commercial applications worldwide.

By integrating the JN15-24 into switchgear systems, users benefit from enhanced safety, equipment protection, and reduced maintenance costs, ensuring reliable power distribution in demanding environments.