40.5KV Vacuum Circuit Breaker

The Sunway Hanguang 40.5KV Vacuum Circuit Breaker is specifically designed for 50/60Hz medium-voltage systems, covering models such as VCB 40.5/1250-25, 1600-31.5, and 2000-40. It is a core indoor equipment for 35kV/40.5kV power distribution networks. It adopts a split-type design, with the vacuum interrupter integrated in the upper part and the spring operating mechanism in the lower part. It incorporates proprietary high-vacuum arc extinguishing technology and epoxy resin APG process for solid-sealed poles. Leveraging over fifty years of experience since its founding in 1968, it integrates a one-time sealing process and full-chain quality control, complying with international and industry standards such as IEC 60947-2. It is directly compatible with mainstream switchgear from brands such as ABB, Siemens, and Schneider.

The 40.5KV Vacuum Circuit Breaker is exported to Europe, the Americas, the Middle East, and Southeast Asia. Exports have grown by over 10% annually in the past decade, and it operates stably in over 600 projects worldwide. With its high reliability, strong environmental adaptability, and comprehensive service, it has become a core equipment in power, new energy, petrochemical, and rail transit sectors. As a high-tech enterprise specializing in high-voltage electrical equipment for over fifty years in China, we are a professional supplier and manufacturer with full-industrial chain capabilities. Our own factory integrates internationally leading processes and rigorous quality control. Our products comply with multiple international and industry standards, are compatible with mainstream imported switchgear types, and are exported globally, with over 350,000 units installed. It is the preferred equipment in many fields.

Core Product Features

1. Leading Core Technology, Stable Arc Extinguishing Performance

Equipped with a high-purity Cu-Cr longitudinal magnetic field contact vacuum interrupter, with optional imported and domestic core components; uses a one-time sealing process instead of traditional brazing, and undergoes helium mass spectrometry leak detection, significantly reducing leakage rate. Vacuum degree ≤1.33×10⁻³Pa, cutoff value <3A, achieving arc-free interruption, 30 full-capacity interruption cycles, over 15 years of trouble-free operation in the field, with an average trouble-free life of over 30 years.

2. Reasonable Structural Design, Excellent Insulation Performance

The upper and lower split structure facilitates debugging and maintenance. The solid-sealed pole is formed in one piece using the APG process, coupled with a built-in voltage equalization structure, achieving a power frequency withstand voltage of 95kV/1min and a lightning impulse withstand voltage of 185kV. It has passed various environmental tests, is suitable for pollution level IV, and can operate stably in environments from -45℃ to +85℃, at altitudes ≤4000 meters, and in high humidity environments. It meets EMC Class 4 electromagnetic interference resistance.

3. Reliable Operating Mechanism, Suitable for Frequent Operations

The 40.5KV Vacuum Circuit Breaker is equipped with a spring energy storage operating mechanism, screw drive design, supporting AC/DC electric and manual emergency operation, with closing time <75ms and opening time <65ms, and multiple safety functions. Mechanical life ≥20,000 cycles, maintenance-free within 10,000 operations, suitable for frequent operation scenarios such as power plants and substations.

4. Strong Intelligence and Scalability, Controllable Operation and Maintenance Costs

Optional intelligent monitoring modules are available, supporting mainstream communication protocols, and seamlessly integrating into the operation and maintenance platform. The fully enclosed structure achieves 30 years of maintenance-free operation, reducing operation and maintenance costs by more to than 80%. The modular design facilitates quick on-site inspection and replacement.

5. Strict and Traceable Quality Control, Environmental Compliance

Based on a complete set of advanced testing equipment, each product undergoes 20 factory inspections, generating a unique traceable electronic file. No oil or SF6 emissions, complying with environmental and quality management system standards, with multiple international certifications available, suitable for global power grid requirements.

6. Company Strength and Comprehensive Service Guarantee

We have a professional R&D team, rigorously select core components, and produce and sell 350,000 vacuum interrupters annually. We have 80 technical support centers worldwide, providing full-cycle service and a 10-year limited warranty. We offer 24-hour on-site response in core areas domestically and 72-hour response internationally.

Product Parameters

Frequently Asked Questions

1. Which switchgear types are compatible with this product, and can it replace imported equipment?

The 40.5KV Vacuum Circuit Breaker is compatible with mainstream switchgear types such as metal-enclosed switchgear, ring main units, and GIS. It is compatible with switchgear of the same voltage level from brands such as ABB and Siemens. Standardized dimensions and interfaces allow for direct replacement without modifying the switchgear, and it has already successfully replaced imported equipment overseas.

2. How is operational stability ensured in harsh environments?

Thanks to our proprietary aging process, optimized vacuum interrupter, and APG fully enclosed pole, it can withstand corrosion from salt spray and condensation. The high-altitude version features enhanced insulation and sealing, suitable for environments up to 4000 meters, and its performance has been verified through specialized testing.

3. What is the warranty coverage and after-sales response time?

We provide a 10-year limited warranty. Non-human-caused failures during the warranty period are eligible for free repair or replacement. Supported by 80 technical centers worldwide, we offer 24-hour on-site response in core areas domestically and 72-hour response internationally, along with 7x24-hour remote service.

4. Do you support customization? What are the customization and delivery cycles?

We support customization of working conditions, intelligent modules, and core components. The customization cycle for core components is 25-30 days. Regular customized models are produced simultaneously with standard models, and regular models are delivered within 20 days.

5. What should be noted during daily maintenance, and are professional personnel required?

The spring mechanism requires no maintenance within 10,000 operations. Daily maintenance only requires cleaning the cabinet, checking terminal tightening, and checking the energy storage status; no professional personnel are required. We recommend checking the vacuum level and calibrating the mechanical characteristics every 5 years, and on-site service is available.

6. What is the lifespan of the core components, and is replacement convenient?

The vacuum interrupter has a lifespan of 30 years, and the operating mechanism has a mechanical life of ≥20,000 operations. The core components are modular in design, and on-site personnel can replace them after simple training. One person can complete the maintenance within half a day.

7. How do you ensure the quality consistency of batch products?

The entire process is covered by quality control, encompassing raw materials, production, and testing. Each 40.5KV Vacuum Circuit Breaker undergoes 20 comprehensive inspections and is assigned a unique QR code for traceability, ensuring consistent quality across all batches of products.