VS1-24 Series Side-Mounted High-Voltage Vacuum Circuit Breaker

Overview

This series of indoor highvoltage vacuum circuit breakers (hereinafter referred to as “the circuit breaker”) is suitable for threephase AC power systems with a rated voltage of 24 kV and a rated frequency of 50 Hz, with rated currents ranging from 630 A to 1250 A. It is widely used in industrial and mining enterprises, power plants, substations and other power systems for the control and protection of cables, overhead lines, transformers, capacitor banks, motors, etc.

The product complies with GB 19842014 AC HighVoltage Circuit Breakers, JB 38551996 3.6 kV～40.5 kV Indoor AC HighVoltage Vacuum Circuit Breakers, DL 4032000 Technical Specifications for Ordering 12 kV～40.5 kV HighVoltage Vacuum Circuit Breakers, and meets the relevant requirements of IEC 62271100 HighVoltage AC Circuit Breakers, with performance reaching Class C2E2M2.

Main Features

a) Fewer parts, simple structure and easy operation.

b) Modular functional unit design with reasonable layout for easy maintenance.

c) Innovative design with no requirement for contact engagement adjustment.

d) The mechanism can be equipped with either assembled insulating cylinders or solidsealed pole main circuit components.

Environmental Conditions

a) Altitude: ≤ 1000 m above sea level.

b) Ambient temperature: –15 °C to +40 °C.

c) Relative humidity: Daily average ≤ 95%, monthly average ≤ 90%; daily average saturated vapor pressure ≤ 2.2×10⁻³ MPa, monthly average ≤ 1.8×10⁻³ MPa. Condensation may occur during sudden temperature drops in highhumidity periods.

d) Seismic intensity: ≤ Grade 8.

e) Locations free of dripping water, steam, flammable gases, fire, explosion hazards, chemical corrosion and severe vibration.

Technical Parameters

Mechanical Characteristics After Assembly and Adjustment

Closing/Opening Electromagnet Technical Data

EnergyStorage Motor Technical Data

Product Structure

The circuit breaker adopts a fronttorear layout of the operating mechanism and arc extinguishing chamber, with a threephase floorstanding main conductive circuit. This design matches the operating performance of the mechanism with the breaking requirements of the arc extinguishing chamber, reduces intermediate links, lowers energy consumption and noise, and enhances reliability.

The springtype operating mechanism is arranged horizontally with manual energystorage capability. It is housed in a mechanism box at the front of the arc extinguishing chamber, which also serves as the operating frame. The mechanism and box can be assembled separately. The energystorage, closing and opening components have fewer parts, a compact and simple structure, and high reliability.

The circuit breaker is equipped with a cupshaped axial magnetic field vacuum interrupter with an extremely high vacuum level. When the moving and static contacts open under load via the operating mechanism, a vacuum arc forms between the contacts. Due to the inclined slots in the same direction on the contacts, the arc current generates a large circumferential component, creating an axial magnetic field between the contacts. This maintains a diffuse arc, burns it evenly over the contact surface, and keeps the arc voltage low. At natural current zero, residual ions, electrons and metal vapor recombine on the contact surface or shield in microseconds. The dielectric strength of the interrupter gap recovers rapidly, extinguishing the arc and completing the break. The advanced axial magnetic field technology provides strong, stable currentbreaking capability.

Circuit Breaker Operation

1. EnergyStorage

1.1 The circuit breaker supports both manual and electric energystorage. Without closing power, use the builtin energystorage handle to move vertically up and down as indicated on the panel (special mechanisms use a Zhandle for clockwise rotation). This drives the gear shaft and energystorage shaft with spring crank arm, stretching the closing spring for energy storage.

1.2 For electric energystorage, the motor is energized, outputting torque via gears to stretch the closing spring. A microswitch cuts motor power upon completion.

2. Closing

After energy storage, energize the closing coil or press the panel closing button to rotate the closing halfshaft, releasing stored energy for closing. The status indicator shows “closed”.

Notes:

A. Closing is disabled if the circuit breaker is closed or the trucktype breaker is moving.

B. Closing is disabled with an electrical closing interlock if secondary control power is not connected.

3. Opening

Upon receiving an opening signal or pressing the panel opening button, the opening halfshaft rotates, releasing the opening latch. The contact pressure and opening springs drive the main shaft crank arm to disengage from the latch, completing opening.

Interlock Devices

a) Antipumping device: Prevents reclosing after electrical closing if the closing command remains active. Confirm if required if the switchgear has microprocessor protection antipumping.

b) Locking device (optional): Prevents closing if secondary control power is absent or below specification. Locking coil voltage range: 65%～110% of rated voltage.

c) Antimisoperation interlocks:

1. Reclosing disabled before opening.

2. Reclosing disabled with an active closing command, regardless of breaker status.

Outline and Secondary Wiring Diagrams

(Diagram reference: 电机回路：Motor circuit, 合闸回路：closing circuit, 闭锁回路：interlock circuit, 分闸回路：opening circuit)

Installation and Commissioning

Notes:

a) Installation, commissioning, operation and maintenance must be performed by trained personnel familiar with the product, with proper safety precautions.

b) Lift only via marked lifting holes. Do not stress upper/lower terminals or subject to severe impact/vibration.

Installation

1. Mount in switchgear without tension/compression/deformation. Use spring or disc washers.

2. Avoid permanent tension/compression on main terminals during connection.

3. Ensure bolt engagement depth exceeds thread diameter for busbar connections.

4. Use Grade 8.8 bolts with spring/disc washers.

5. Remove contaminants.

Commissioning

Factory tests confirm compliance. Prepare before primary energization:

1. Inspect for damage or hazardous conditions.

2. Clean insulation surfaces.

3. Verify primary/secondary wiring and grounding.

4. Perform power frequency withstand voltage test.

5. Manually operate energystorage, closing/opening; check status indicators.

6. Electrically operate and verify indicators.

Maintenance

Premaintenance: Place breaker in open/unenergized state; isolate primary/control power.Use cleaners compatible with plastics/rubber.

1. Lubricate moving parts and clean insulation surfaces annually.

2. Operate 5 times/year if stored longterm.

3. Perform insulation tests annually to check interrupter integrity.

4. Limit operations within mechanical life for frequent use.

5. Troubleshooting

Transportation and Storage

Transportation

Only the following tools may be used to load and unload the packaging

cases: cranes, forklifts or overhead cranes.

The vacuum circuit breaker must be fully enclosed and secured in its

packaging case during transportation. Packaging, unpacking and storage

shall all be carried out in a dry indoor environment. During transportation,

the vacuum circuit breaker must not be inverted, exposed to rain, or

subjected to severe vibration or impact. When transported by road on Class

3 highways, the vehicle speed must not exceed 20 km/h.

Before delivery, the factory-assembled circuit breakers have undergone rigorous testing in accordance with the GB1984-2014 standard and the factory inspection procedures for circuit breakers to verify the correctness of their mechanisms and functions, and a factory inspection report is included in the accompanying documents.

Unpacking Check

1. Verify model/specification against contract.

2. Inspect for damage.

3. Check completeness against packing list.

Storage

1. Store in dry, dustfree, ventilated areas per GB/T 11022.

2. Store in open/unenergized state.

3. Repack if original packaging is removed.

4. Check regularly for condensation/moisture.

Attached Documents

a) Product Certificate (1 copy)

b) Factory Test Report (1 copy)

c) Installation and Operation Manual (1 copy)

d) Chassis Crank (for trucktype breakers, 1 unit)

OEM/ODM Services:

At Shaanxi Yuguang Electric Co., Ltd., we understand the importance of customization. That's why we offer comprehensive OEM and ODM services to meet your specific requirements. Whether you need private labeling or custom product development, our experienced team is here to assist you every step of the way.

Certificates:

We take pride in our commitment to quality and safety. Our products are certified to meet the highest industry standards, including:

3C Certification

ISO 9001 Certification

21 Utility Model Patents and Design Patents

Why Choose Us:

State-of-the-art Manufacturing Equipment

Extensive Testing Facilities

Comprehensive Quality Assurance Processes

ISO 9001 Certified Quality Management System

One-year Warranty on All Products

Large Production Capacity

FAQ:

Q: What is the warranty period for your products?

A: We offer a one-year warranty on all our products.

Q: Can you customize products according to our specifications?

A: Yes, we provide OEM and ODM services to meet your specific requirements.

Q: Are your products compliant with international standards?

A: Yes, our products meet all relevant international standards.

Q: What is the lead time for orders?

A: The lead time depends on the quantity and customization requirements. Please contact us for more information.

Q: Do you provide technical support?

A: Yes, we offer comprehensive technical support to our customers.

Packaging:

Wooden Box Packaging

Carton Packaging

Foam-filled Packaging

Waterproof and Moisture-proof Packaging

Customized Packaging

International Standard Packaging

Logistics:

Sea Freight

Air Freight

Land Transportation

Multimodal Transport

Express Delivery Services

Contact Us:

Ready to take your electrical projects to the next level? Contact us today at ygvcb@hotmail.com to discuss your requirements and explore partnership opportunities with Shaanxi Yuguang Electric Co., Ltd. Let's create a brighter future together.