Lateral Type Vacuum Circuit Breaker

The Usune Lateral Type Vacuum Circuit Breaker is an indoor-installed high-voltage switchgear, divided into two main series: VS1(ZN63)-12 and VS1-24. It is primarily used in 12KV, 24KV, and 36KV three-phase power systems, undertaking the protection and control responsibilities for power grid equipment and industrial and mining enterprise power systems. Utilizing advanced vacuum arc-extinguishing technology, it features fast arc-extinguishing speed, small size, long service life, and low maintenance costs, making it an indispensable core device in modern power transmission and distribution systems.

Core Advantages:

1. Years of application experience in power transmission and distribution, widely used in industrial and mining enterprises, power plants, and urban and rural power grids, gaining widespread user recognition for its stable performance and reliable operation.

2. Independently developed by Usune's professional R&D team, featuring a side-mounted design that integrates the spring operating mechanism with the circuit breaker body, optimizing the overall structure; the vacuum interrupter uses an APG-process epoxy resin insulating cylinder, offering excellent creepage performance and environmental adaptability.

3. Strictly complies with GB/T1984-2014 "High Voltage Circuit Breakers", JB3855-1996 "3.6~40.5KV Indoor High Voltage Vacuum Circuit Breakers", DL/T403-2000 "12~40.5KV Vacuum Circuit Breakers Ordering Technical Conditions", and IEC62271-100:2008 international standards, and has passed multiple authoritative testing and certifications.

4. As a professional manufacturer of high-voltage electrical equipment in China, Usune possesses a standardized production plant, and each circuit breaker undergoes rigorous testing before leaving the factory. As a reliable supplier, it provides comprehensive after-sales service and technical support, eliminating any concerns for users.

Product Specifications and Technical Parameters

Usune Lateral Type Vacuum Circuit Breaker offers a complete range of specifications and stable performance. The main technical parameters (taking the VS1(ZN63)-24 series as the primary reference) are shown in the table below:

Structure and Function

1. Overall Structure

The operating mechanism and arc-extinguishing chamber are arranged in an integrated structure, with the main conductive circuit being a three-phase floor-mounted type. The vacuum arc-extinguishing chamber is longitudinally installed within an APG-processed epoxy resin tubular insulating cylinder, providing excellent creepage performance, reducing dust accumulation on the arc-extinguishing chamber surface, avoiding the influence of external factors, and ensuring good insulation even in humid and heavily polluted environments. The VS1-12 series is a fixed-installation type, suitable for fixed switchgear, and can be used independently or applied to ring network power supply, box-type transformer, and other systems.

2. Operating Mechanism

The Lateral Type Vacuum Circuit Breaker employs a planar spring-operated mechanism, supporting both manual and electric energy storage. The operating motor is housed within the front cabinet of the arc-extinguishing chamber, divided into five assembly spaces, each housing the energy storage, transmission, tripping, and buffer components. The integrated design of the arc-extinguishing chamber and operating mechanism ensures a high degree of matching between operational performance and the arc-extinguishing chamber's opening and closing requirements, reducing intermediate steps, lowering energy consumption and noise, and improving the circuit breaker's operational reliability.

Application Environment

The Lateral Type Vacuum Circuit Breaker is suitable for indoor environments and must meet the following requirements: ambient temperature -15℃ to +40℃; daily average relative humidity ≤95%, monthly average ≤90%; altitude ≤1000m; seismic intensity ≤8 degrees; and absence of significant dust, corrosive gases, or other pollution. Note: Customization is required for applications exceeding these requirements upon prior consultation with the manufacturer.

Installation and Commissioning

Lateral Type Vacuum Circuit Breakers undergo rigorous testing before leaving the factory. Before energizing the primary circuit, the following preparations must be made:

1. Check the equipment for damage; if damaged, stop using it.
2. Clean the insulation surface of any contaminants.
3. Manually operate the energy storage and opening/closing functions, observing that the status is normal.
4. Operate using the operating power supply, confirming that the status is normal.
5. Advance/retract the handcart-type circuit breaker according to specifications, and confirm that the position indicator is normal after reaching the correct position.

Note: When using a closing interlocking device, power must be connected to unlock it before closing.

Practical Application Case

Case Study: Application in a Large Industrial and Mining Enterprise in China

A large steel enterprise in China has a complex power system with high requirements for equipment operating frequency and short-circuit current control. After comparing multiple suppliers, the Usune VS1(ZN63)-24 series circuit breaker was selected as the core protection device for the power distribution system. Since its commissioning in 2024, the system has operated stably for over 12 months without any failures, successfully handling three short-circuit faults, effectively protecting equipment and preventing power outage losses. The company highly recognizes the product's performance and the installation and commissioning services provided by the manufacturer.

1.Switch box
2.Lash bolt
3.Closing spring
4.Closing fittings
5.Internal electrical wiring principal
6.Cam mechanism/operation of mechanism
7.Gear wheel transmission mechanism
8.Input connecting lever
9.Charged motor
10.Fourlever transmission mechanism
11.Transmission block
12.Tripping mechanism

Supplier and Manufacturer Commitment: Usune, as a professional manufacturer of high-voltage electrical equipment in China, possesses a standardized factory and a professional R&D, production, and after-sales team. As a reliable supplier, we adhere to the principle of "quality first, customer foremost," strictly controlling all aspects of production to ensure products meet standards and user needs; we provide comprehensive after-sales services including on-site installation guidance, commissioning, maintenance, and technical training, and continuously innovate and optimize our products to support the development of the power transmission and distribution industry.