High Voltage Disconnector

The Usune GW8 and GW13 series high voltage disconnectors for transformer neutral grounding systems are outdoor high-voltage electrical equipment specifically designed for transformer neutral point grounding systems. Suitable for 50Hz/60Hz AC systems, they are available in 40.5kV, 72kV, and 110kV voltage specifications. Their core function is to safely switch the transformer neutral point connection state under no-load conditions, meeting the safety requirements for power system operation mode switching and equipment maintenance.

Product Models and Operating Mechanisms

1. GW8 Series: Can be equipped with a CJ-type electric operating mechanism or a CS8-type manual operating mechanism, suitable for neutral point grounding scenarios in conventional substations.

2. GW13 Series: Can be equipped with a CJ-type electric operating mechanism or a CS14-type manual operating mechanism, offering more flexible operation and higher reliability.

Product Structure

The GW8 and GW13 series high voltage disconnects for transformer neutral grounding systems adopt a single-pole structure, mainly composed of a pole body and an operating mechanism.

1. Pole Body

Includes a base, post insulator, conductive arm, contacts, etc. The post insulator provides reliable electrical insulation, the conductive arm and contacts form the main conductive circuit, and the base ensures stable installation.

2. Operating Mechanism

Drives the conductive arm to rotate via a linkage, realizing the opening and closing action of the disconnector switch. Precise positioning and stable operation ensure a clear and reliable disconnection after opening.

Product Features and Advantages

1. High Safety Performance

Utilizes high-quality insulation materials and precision contact design, with excellent insulation strength and arc-extinguishing performance, ensuring safe no-load switching.

2. Flexible Operation

Supports both electric and manual operation modes, adapting to the automatic control and on-site manual operation needs of different scenarios.

3. Strong Environmental Adaptability

Designed specifically for outdoor use, resistant to high and low temperatures, humidity, corrosion, and pollution, suitable for various harsh outdoor environments.

4. Stable and Reliable Operation

Strict material selection and process control, coupled with a comprehensive quality management system, result in a low failure rate and long-term stable operation.

5. Simple Structure and Convenient Maintenance

Compact structure, easy installation and maintenance, effectively reducing subsequent operation and maintenance costs.

Application Case

Case 1: 220kV Urban Substation in East China

A 220kV urban central substation in East China uses the Usune GW8-110kV High Voltage Disconnector for Transformer Neutral Grounding System for its main transformer. This substation is responsible for power supply to the city center, requiring extremely high equipment reliability and safety. Since its commissioning in 2022, the equipment has successfully completed thousands of neutral point switching operations. During annual maintenance and grid operation mode adjustments, its flexible operation and reliable contact performance have effectively ensured the personal safety of maintenance personnel and the stable operation of the power grid.

Case Study 2: Northwest Wind Farm Substation

A large wind farm substation in Northwest China selected the Usune GW13-72kV high voltage disconnects for the transformer neutral grounding system. The region has harsh natural conditions, with large temperature differences, strong winds and sandstorms, and high altitude. The GW13 series products, with their excellent outdoor adaptability and corrosion resistance, have been operating stably for over three years, effectively cooperating with the wind farm transformer neutral point grounding protection system to ensure the safe and stable operation of the wind power generation system and the smooth grid connection of electricity.

Main Technical Parameters

Outer Dimensions

Project Reference

Cas-space Rocket Launch Project

Test Report

FAQ

Q1: What are the main differences between the Usune GW8 and GW13 series neutral point disconnect switches?

A: The core difference lies in the matching operating mechanism and some structural designs. The GW8 series is equipped with a CJ-type electric mechanism or a CS8-type manual mechanism; the GW13 series is equipped with a CJ-type electric mechanism or a CS14-type manual mechanism. Structurally, it features an optimized rotating contact design, offering enhanced self-cleaning capabilities and better suitability for harsh outdoor environments.

Q2: Can Usune neutral grounding disconnect switches be used in high-altitude and high-temperature areas?

A: Yes. This series is designed specifically for outdoor use, with strong environmental adaptability. It can operate normally at altitudes ≤1000m (higher altitudes can be customized) and in temperatures ranging from -40℃ to +40℃. It possesses excellent moisture resistance, pollution resistance, and corrosion resistance. Special anti-corrosion and anti-icing treatments can be provided according to user requirements.

Conclusion

The Usune GW8 and GW13 series transformers (High Voltage Disconnect For Transformer Neutral Grounding System) are high-quality products integrating advanced technology, reliable quality, and excellent performance. As a professional manufacturer and supplier in China, Usune always adheres to the principles of quality first and customer foremost, providing safe, reliable, and efficient high-voltage electrical equipment solutions for global power system customers. Among them, the neutral point grounding disconnect switch products have gained widespread recognition and trust from power industry customers due to their rich practical application experience and comprehensive after-sales service.