Indoor High Voltage Vacuum Circuit Breaker

The Usune VS1(ZN63)-12 series Indoor High Voltage Vacuum Circuit Breaker is a core electrical protection and control device for 12kV power systems. The integrated design of the spring-operated mechanism and circuit breaker body reduces intermediate transmission links, lowers energy consumption and noise, and improves product operational reliability. The main circuit uses integrally solidified poles, achieving miniaturization of the circuit breaker, enhancing environmental adaptability and service life, and enabling maintenance-free operation in most scenarios.

Product Advantages

1.High Reliability

The vacuum interrupter is longitudinally installed within a tubular insulating cylinder made with epoxy resin APG, providing excellent creepage resistance and effectively preventing dust accumulation and external interference. It can operate stably even in humid and heavily polluted environments.

2.Flexible Configuration

It can be designed as a fixed installation unit or equipped with a dedicated actuator to form a drawer unit. It perfectly matches the KYN28A-12 (GZS) type center-mounted drawer-type switchgear. The fixed type can also be used in the XGN series fixed switchgear.

3.Adaptable to Frequent Operation

Leveraging the unique advantages of vacuum interruption, it is particularly suitable for scenarios requiring frequent operation at rated operating current and repeated interruption of short-circuit current, offering strong practicality.

4.Compliance with Standard

Strictly adheres to 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 standards, ensuring authoritative quality assurance.

Technical Parameters

Structure and Function

1.Overall Structure

The Usune VS1(ZN63)-12 Indoor High Voltage Vacuum Circuit Breaker adopts an integrated structure with the operating mechanism and arc-extinguishing chamber arranged front and rear. The main conductive circuit is a three-phase floor-mounted structure. This unique design significantly reduces dust accumulation on the arc-extinguishing chamber surface, preventing the vacuum arc-extinguishing chamber from being affected by external factors. Even in humid and heavily polluted environments, it maintains excellent withstand voltage and high resistance, outperforming similar products.

2.Operating Mechanism Structure

The operating mechanism is a planar spring-operated mechanism with both manual and electric energy storage functions. The operating motor is located in the cabinet in front of the arc-extinguishing chamber. The cabinet is divided into five assembly spaces by four intermediate partitions, each housing the energy storage, transmission, tripping, and buffer components of the operating mechanism. The integrated design of the arc-extinguishing chamber and operating mechanism ensures a high degree of matching between the operating mechanism's performance and the arc-extinguishing chamber's opening and closing requirements, reducing redundant components, lowering energy consumption and noise, and improving the circuit breaker's operational reliability.

Operating Environment

1. Ambient Temperature: Maximum +40℃, Minimum -15℃
2. Ambient Humidity: Daily average relative humidity ≤95%; Monthly average relative humidity ≤90%; Daily average water vapor pressure ≤22×10⁻³MPa; Monthly average water vapor pressure ≤1.8×10⁻³MPa
3. Altitude: Not exceeding 1000m
4. Seismic Intensity: Not exceeding 8 degrees
5. Atmospheric Environment: No significant dust, smoke, corrosive or flammable gases, vapors, or salt spray pollution in the surrounding air.

Note: If the above normal operating environment conditions are exceeded, please consult with our manufacturer in advance to customize the product according to the actual working conditions.

Installation and Commissioning

1. Check the circuit breaker for damage during transportation and storage. If any damage is found, stop using it immediately and contact our supplier for after-sales support.
2. Remove dirt (especially from the insulation surface). Dirt generated during transportation or storage can affect the insulation performance of the product and may even cause safety hazards.
3. Manually operate the circuit breaker according to regulations to store energy, close, and open, observing whether the energy storage status and the open/close position indicators are normal.
4. Operate the circuit breaker using the operating power supply to store energy, close, and open, observing whether the energy storage status and the open/close position indicators are normal.
5. Operation of the handcart-type circuit breaker: Insert the push handle into the push hole, turn it clockwise to advance, and counterclockwise to retract, with a total advance stroke of 300±3mm; in the open position, smoothly move it to the working or test position, turning the handle 30 times at medium speed until a "click" sound is heard, indicating it is in the correct position (do not use excessive force to avoid damaging the push mechanism), and simultaneously, the corresponding position indicator circuit will be connected.

Note: If a closing interlocking device is selected, the interlocking circuit power supply must be connected to unlock it before closing the circuit.

Real-world Application Case

Case Study: Urban Commercial Complex Power Distribution Project

A 150,000㎡ commercial complex (integrating shopping mall, office building, and hotel) in the core business district of Hangzhou, China, required high-voltage circuit breakers with stable performance, adaptability to frequent operation, and high safety to ensure the continuity of overall power supply. After comparing various options, the client selected the Usune VS1-12/630-25 handcart-type Indoor High Voltage Vacuum Circuit Breaker, deploying 20 units to handle short-circuit protection and load control of the complex's high and low voltage power distribution system. Since commissioning, it has operated stably without any faults, with fault isolation time reduced to 0.3 seconds, effectively ensuring the normal operation of electrical equipment and earning high praise from the client.

FAQ

Q1: What if the Indoor High Voltage Vacuum Circuit Breaker is used in an environment outside the normal range?

A1: If the actual operating environment exceeds normal conditions (such as altitude above 1000m, ambient temperature below -15℃ or above +40℃, etc.), it is necessary to consult with our manufacturer in advance. Our factory will customize products based on actual environmental parameters, such as enhancing insulation performance and optimizing sealing structures, to ensure stable operation in the target environment.

Q2: How to maintain the Usune VS1-12 series circuit breakers to extend their service life?

A2: The product adopts an integrated solidified pole and integrated structure, achieving maintenance-free operation under normal use. Only periodic checks of the circuit breaker surface cleanliness (especially the insulation surface), removal of dust and dirt, and observation of the open/close position indicators and energy storage status are required. If any abnormalities are found, immediately stop using the product and contact our supplier for professional after-sales maintenance to prevent further damage.

Q3: Are the Usune VS1-12 series circuit breakers compatible with other brands of switchgear?

A3: Yes. The product is designed according to national and international standards and is perfectly compatible with KYN28A-12 (GZS) type center-mounted drawer-type switchgear and XGN series fixed switchgear. Furthermore, our manufacturer can adjust the product dimensions and interfaces according to the specific switchgear model of the customer to ensure compatibility. Before purchasing, please provide the switchgear parameters to our supplier for professional matching advice.