Sf6 Load Breaker Switch

As a professional manufacturer of high-voltage electrical equipment in China, Usune focuses on the R&D and production of medium and high-voltage power distribution equipment, possessing a standardized factory equipped with advanced production lines and strict quality inspection processes. The FLN36-12D and FLRN36-12D indoor AC high-voltage Sf6 Load Breaker Switches launched by the company are core products independently developed by absorbing advanced foreign technology and combining it with the actual operational needs of China's power system.

All Usune Sf6 Load Breaker Switches have passed comprehensive type testing, and their performance fully complies with GB3804 "3~63kV AC High Voltage Load Switches", GB16926 "High Voltage Load Switches-Fuse Combinations", and IEC60265 and IEC60420 international standards. Adhering to the core concept of "everything for safe power use," the products are equipped with a three-position arc-extinguishing chamber ("closing-opening-grounding"), effectively ensuring safe and stable power operation. As a reliable supplier of high-voltage switchgear, Usune provides comprehensive pre-sales consultation and after-sales service to ensure smooth operation of equipment in various application scenarios.

Application Scope

The Sf6 Load Breaker Switch is suitable for three-phase AC 10kV, 24kV, 36kV, 50/60Hz power systems. It is widely used in industrial and mining enterprises, high-rise buildings, urban residential areas, substations, large shopping malls, airports, subways, hospitals, and other power distribution scenarios. Its core functions are to switch load current and fault current, control and protect lines and distribution transformers, providing safe and stable power protection for all sectors of social production and life.

Usage Conditions

1. Normal Operating Conditions

- Ambient Temperature: -25℃ to +40℃, suitable for most climate conditions in China and other regions.
- Altitude: Not exceeding 2000m, suitable for most cities and industrial areas.
- Humidity: Daily average relative humidity <95%, monthly average relative humidity <90%; daily average vapor pressure ≤2.2kPa, monthly average vapor pressure ≤1.8kPa, ensuring stable operation in humid environments.

2. Special Operating Conditions

According to the national standard GB/T11022-1999 "Common Technical Requirements for High Voltage Switchgear and Controlgear Standards", the switchgear should operate under normal operating conditions. If the user's operating conditions do not conform to normal conditions (such as installation altitude exceeding 2000m, ambient temperature exceeding normal limits, high humidity causing condensation, etc.), it is necessary to consult with the professional manufacturer Usune in advance to reach a consensus and ensure the safe and stable operation of the equipment.

Structural Features

1. Integrated Insulation Structure: The upper and lower shells are injection molded with epoxy resin, forming a sealed, gas-filled internal cavity. This provides excellent insulation and corrosion resistance, effectively isolating the internal components from the external environment and ensuring stable operation.

2. Three-Position Operating Mode: The common moving contact rotates, gradually completing three operating states: "closing," "opening," and "grounding." The positions are clearly defined, switching is reliable, and misoperation is effectively prevented.

3. Dual Operating Mechanisms: A basic manual spring-loaded operating mechanism is included, with an optional electric closing/opening function for remote control. This allows users to choose according to their needs, improving operational efficiency.

4. Intelligent Monitoring: The front of the mechanism box is equipped with an SF6 pressure gauge and a position indicator. The pressure gauge monitors SF6 pressure changes in real time, and the position indicator is directly connected to the moving contact drive shaft, ensuring absolutely reliable indication of the moving contact's working position.

5. Safety Protection: A pressure relief escape device is located at the rear of the shell. When an accident occurs in the arc-extinguishing chamber and high pressure is generated, the overpressure gas can break through the release device and be discharged backward, preventing forward ejection and ensuring the safety of operators.

6. Reliable Interlocking: Reliable mechanical interlocks are provided between the load switch and the grounding switch, and between the grounding switch and the front door (for cabinet power distribution), strictly preventing misoperation and further enhancing equipment operational safety.

7. Sealing Performance: Utilizing a dedicated dynamic and static sealing design, reliable sealing is ensured. Usune's rigorous sealing process ensures an annual leakage rate far below industry standards, preventing equipment failure due to SF6 gas leakage.

Main Technical Parameters

Practical Application Cases

Case 1: Power Distribution Project in a Chinese Urban Residential Area

A large residential area in eastern China comprises 30 high-rise buildings with over 2000 households and a peak power demand of 800kW. Initially, ordinary load switches were used, frequently experiencing problems such as poor sealing, unstable operation, and tripping, affecting residents' normal power supply. Later, after comparing multiple suppliers, the property management company selected the Usune FLN36-12D Sf6 Load Breaker Switch as the core power distribution control equipment.

Case Study 2: Large Airport Power Supply Protection Project A key international airport in southern China has extremely high requirements for power supply stability and security. Power outages are not permitted in critical areas such as the terminal building and navigation control room. The airport selected Usune FLRN36-12D Sf6 Load Breaker Switches for installation in the substation, responsible for the control and protection of lines in critical areas.

Brand Commitment

As a professional manufacturer of high-voltage electrical equipment in China, Usune is committed to providing global users with high-quality, reliable, and safe Sf6 Load Breaker Switch products. Our factory boasts advanced production equipment and a rigorous quality management system. From raw material procurement to product delivery, every step undergoes strict testing to ensure product quality. As a trustworthy supplier, we not only provide high-performance products but also comprehensive pre-sales consultation, on-site installation, commissioning, and after-sales maintenance services, eliminating any concerns users may have during operation.