36kV Indoor High Voltage Circuit Breaker

The 36kV Indoor High Voltage Circuit Breaker (Model: ZN85-40.5) is a medium-voltage vacuum circuit breaker designed for reliable protection and switching of electrical distribution systems. Featuring a compact vertical structure with an integrated spring operating mechanism, it significantly reduces installation depth while maintaining excellent mechanical strength and operational stability.

Designed for industrial power distribution, substations, power plants, mining operations, and large commercial facilities, the 36kV Indoor High Voltage Circuit Breaker provides dependable switching of normal load current, overload current, and short-circuit fault current. Its maintenance-friendly structure, long service life, and high breaking performance make it an ideal solution for modern medium-voltage switchgear systems.

Product Photos

Product Dimensions Diagram

1. Opening Spring
2. Main Shaft
3. Middle Pole Crank Arm
4. Transmission Rod
5. Transmission Connecting Plate
6. Contact Spring
7/8/9. Transmission Connecting Plates
10. Side Pole Crank Arm
11. Rod-End Spherical Bearing

Key Features

• Compact vertical-mounted structure minimizes switchgear installation depth.
• High-performance vacuum interrupter delivers fast arc extinction, excellent insulation recovery, and reliable fault interruption.
• Maintenance-free spring operating mechanism supports up to 10,000 mechanical operations, reducing operating costs.
• Stable transmission system ensures smooth opening and closing performance with high operational reliability.
• Lightweight design simplifies installation, commissioning, and equipment maintenance.
• Suitable for frequent switching operations in demanding medium-voltage applications.
• Compatible with power plants, substations, industrial facilities, mining enterprises, and utility distribution networks.

Typical Applications

The 36kV Indoor High Voltage Circuit Breaker is widely used for medium-voltage power protection and control in:

• Power generation plants
• Electrical substations
• Industrial manufacturing facilities
• Mining operations
• Petrochemical plants
• Commercial and infrastructure power distribution systems
• Medium-voltage switchgear panels

Technical Parameters

Advantages

• Excellent short-circuit interruption capability for medium-voltage networks.
• High dielectric strength and rapid insulation recovery after current interruption.
• Low maintenance requirements thanks to the sealed vacuum interrupter and optimized spring mechanism.
• Compact footprint allows installation in space-constrained switchgear cabinets.
• Long mechanical and electrical service life reduces total ownership cost.
• Reliable performance under frequent switching conditions.

Why Choose Our products?

Our 36kV Indoor High Voltage Circuit Breaker is manufactured under strict quality control procedures using premium vacuum interrupters and precision mechanical components. Every unit undergoes comprehensive factory testing before shipment to ensure stable electrical performance and long-term operational reliability.

OEM and customized configurations are available, including different rated currents, operating voltages, installation dimensions, auxiliary contacts, and switchgear matching solutions to satisfy various project requirements worldwide.

FAQ

1. What is a 36kV Indoor High Voltage Circuit Breaker used for?

It is designed to protect and control medium-voltage electrical systems by switching normal load current, overload current, and short-circuit fault current. It is widely used in substations, power plants, industrial facilities, mining operations, and medium-voltage switchgear.

2. What are the main advantages of a vacuum circuit breaker?

Vacuum circuit breakers provide fast arc extinction, excellent insulation recovery, long mechanical life, low maintenance requirements, compact dimensions, and high operational reliability. They are environmentally friendly because they do not require insulating oil or SF6 gas.

3. What voltage and current ratings are available?

This model supports rated voltages of 36kV and 40.5kV, with rated current options of 1250A, 1600A, and 2000A. Different breaking capacities are available to meet various power distribution requirements.

4. Where can the 36kV Indoor High Voltage Circuit Breaker be installed?

It is suitable for indoor medium-voltage switchgear installed in substations, industrial plants, utility power systems, commercial buildings, renewable energy projects, and mining facilities.

5. Can the circuit breaker be customized?

Yes. OEM and customized solutions are available, including rated current, operating voltage, auxiliary contacts, installation dimensions, control accessories, and switchgear compatibility according to project specifications.

6. How long is the mechanical service life?

The circuit breaker offers a mechanical life of up to 10,000 operating cycles, ensuring reliable long-term performance while minimizing maintenance and replacement costs.

7. Does the product comply with international standards?

The circuit breaker is manufactured and tested according to applicable IEC standards for medium-voltage vacuum circuit breakers. Additional certifications and customized technical requirements can be provided based on customer or project specifications.

8. Can this circuit breaker be integrated into existing switchgear systems?

Yes. It is designed for easy integration into various medium-voltage switchgear panels. Our engineering team can also provide customized mounting dimensions and technical support for retrofit or new installation projects.