Side Mounted Indoor Vacuum Circuit Breaker

The Usune Side Mounted Indoor Vacuum Circuit Breaker is a fixed high-voltage switchgear primarily used in fixed switchgear. It can be used independently or integrated into ring network power supply systems, box-type transformers, and various non-standard power supply systems. Its core advantage lies in its vacuum arc-extinguishing technology, avoiding the pollution and damage caused by traditional arc-extinguishing media, effectively improving power supply safety and stability. This product is independently developed and manufactured by Usune's factory, with mature production processes and strict quality control, ensuring stable and reliable operation under various complex conditions.

Product Standards and Authority To ensure product reliability and compliance, the Usune Side Mounted Indoor Vacuum Circuit Breaker strictly adheres to authoritative domestic and international standards, including GB/T1984-2014 "High Voltage Circuit Breakers", JB3855-1996 "3.6~40.5KV Indoor High Voltage Vacuum Circuit Breakers", and DL/T403-2000 "12~40.5KV Vacuum Circuit Breakers Ordering Technical Conditions", and complies with the relevant requirements of IEC62271-100:2008. Each product undergoes rigorous factory inspection before leaving the factory, and all technical parameters meet design requirements, demonstrating Usune's commitment to product quality and ensuring safe use for users.

Operating Environment and Applicability

The Side Mounted Indoor Vacuum Circuit Breaker is highly adaptable to various environments and suitable for the following indoor operating conditions:

1. Ambient Temperature: Maximum +40℃, Minimum -15℃
2. Ambient Humidity: Daily average relative humidity ≤95%, monthly average ≤90%; daily average vapor pressure ≤22×10⁻³MPa, monthly average ≤1.8×10⁻³MPa
3. Altitude: Not exceeding 1000m
4. Seismic Intensity: Not exceeding 8 degrees
5. Atmospheric Environment: Free from significant dust, smoke, corrosive and flammable gases, vapors, or salt spray pollution.

Note: If the actual operating environment exceeds the above normal requirements, please consult with the professional manufacturer Usune to customize an appropriate product solution.

Structure and Function

1. Overall Structure

The Side Mounted Indoor Vacuum Circuit Breaker adopts a front-to-back arrangement of the operating mechanism and the arc-extinguishing chamber. The main conductive circuit is a three-phase floor-mounted type. The vacuum interrupter is longitudinally installed within a tubular insulating cylinder made using an epoxy resin APG process. This provides excellent anti-creepage performance, significantly reducing dust accumulation on the interrupter surface, preventing external factors from affecting its operation, and ensuring high insulation performance even in humid and heavily polluted environments.

2. Operating Mechanism Structure

The operating mechanism is a planar spring-operated mechanism, supporting manual and electric energy storage. The operating motor is installed in the front cabinet of the interrupter. The cabinet is divided into five assembly spaces by four intermediate partitions, housing the energy storage, transmission, tripping, and buffer components respectively. The product integrates the interrupter and operating mechanism into a single design, ensuring a high degree of matching between the mechanism's operational performance and the interrupter's opening and closing requirements. This reduces unnecessary intermediate steps, lowers energy consumption and noise, and improves operational reliability.

Main Specifications and Technical Parameters

Installation and Commissioning

1. Check the circuit breaker for damage. If damaged, stop using it immediately.
2. Remove contaminants (especially from the insulating surface). Contaminants generated during transportation or storage can affect the product's insulation performance.
3. Manually operate the circuit breaker to store energy and perform closing/opening operations as required, observing whether the energy storage status and closing/opening position indicators are normal.
4. Operate the circuit breaker to store energy and perform closing/opening operations using the operating power supply, checking whether the energy storage status and position indicators are normal.
5. Operation of the handcart-type circuit breaker: Insert the push handle into the push hole, rotate clockwise to advance and counterclockwise to retract, with a total push stroke of 300±3mm; in the open position, smoothly move it to the working or test position, rotating the handle 30 times at medium speed until a "click" sound is heard, indicating it is in position (do not use excessive force to avoid damaging the push mechanism). At this time, the corresponding position indicators (S8, S9) will be activated.

Note: When using a closing interlocking device, the interlocking circuit power supply must be connected to unlock it before closing; when unpacking, operate according to the packaging requirements, hoisting the circuit breaker elbow to ensure the lower outgoing arm is under load, avoiding severe impact and vibration; remove the hoisting device as required before placing it in the cabinet.

Real-world Application Case Study

Case: A large industrial park in South China purchased 50 Usune Side-Mounted Indoor Vacuum Circuit Breakers (model VS1-12/1250-25) for its production workshop power distribution system. Multiple production lines in the park operate alternately, requiring frequent power switching and high reliability in short-circuit current interruption. Since installation and commissioning in 2024, the products have operated stably for 12 consecutive months without failure, effectively protecting and controlling the power system, reducing equipment downtime, and improving the park's production efficiency. As a local Chinese supplier, Usune provided full on-site installation guidance and after-sales maintenance services, earning high praise from the customer.

FAQ

Q1: What if the actual operating environment of the circuit breaker exceeds normal requirements?

A1: If the ambient temperature, humidity, altitude, etc., exceed normal requirements, please contact the manufacturer, Usune, immediately. A professional technical team will conduct an on-site survey and customize a product solution adapted to the special environment to ensure stable operation of the circuit breaker under special conditions. As a responsible supplier, Usune is committed to providing personalized solutions for each customer.

Q2: How to maintain the Usune Side Mounted Indoor Vacuum Circuit Breaker to extend its service life?

A2: Routine maintenance mainly includes three points: First, regularly clean the insulation surface to prevent dirt accumulation from affecting insulation performance; second, regularly check the energy storage status, opening/closing indicators, and wiring to ensure there is no looseness or damage; third, conduct manual and electric operation tests every 6 months to check the flexibility and reliability of the operating mechanism. In addition, the factory provides a detailed maintenance manual and after-sales guidance to help users maintain the product scientifically.