Usune 75 kV High Voltage Vacuum Circuit Breaker is designed for demanding power distribution applications where stable interruption performance, flexible configuration, and reliable control are required. With optimized VS1 structure design, advanced vacuum interruption technology, and optional intelligent protection functions, the product provides a dependable solution for modern high-voltage switching systems.
For high-voltage switchgear projects, mechanical dimensions and cabinet compatibility are critical factors during equipment selection.
The fixed type VS1 structure is designed with optimized installation dimensions, allowing engineers to integrate the breaker into different cabinet configurations according to rated current requirements.
The standard structure supports different cabinet widths and current levels, providing flexibility for various electrical system designs.
| Cabinet Width | Rated Current | Main Dimension Characteristics |
| 800mm | 630A-1600A | Compact structure for medium current applications |
| 1000mm | 630A-1600A | Suitable for larger cabinet configurations |
| 1000mm | 1600A-5000A | Designed for higher current requirements |
The optimized mechanical layout helps reduce installation difficulties while improving equipment coordination with high-voltage switchgear.
Accurate dimension matching is important for reducing engineering modifications during project installation.
The VS1 series provides standardized installation dimensions including mounting position, terminal arrangement, and cabinet interface requirements.
| Parameter | 800mm Cabinet | 1000mm Cabinet |
| Rated Current Range | 630A-1600A | 630A-5000A |
| Application Type | Fixed installation | Fixed installation |
| Structure Design | Compact configuration | High-capacity configuration |
This standardized design allows customers to select suitable configurations according to system capacity and cabinet requirements.
The control system directly affects the operating reliability of high-voltage switching equipment.
The Usune 75 kV High Voltage Vacuum Circuit Breaker adopts a professional control circuit design with optional components including closing coil, opening coil, auxiliary switches, blocking coil, motor energy storage system, and over-current tripping coil.
| Component | Function |
| HQ Closing Coil | Controls breaker closing operation |
| TQ Opening Coil | Controls breaker opening operation |
| M Motor | Provides energy storage function |
| S1 Auxiliary Switch | Indicates energy storage status |
| S8 Auxiliary Switch | Indicates test position |
| S9 Auxiliary Switch | Indicates working position |
| Y1 Blocking Coil | Provides operation locking protection |
| Y7-Y9 Over Current Coil | Provides over-current protection |
This configuration allows engineers to customize the control system according to different project requirements.
During electrical operation, repeated closing signals may cause abnormal switching actions.
The optional anti-bounce relay helps prevent repeated closing operations by disconnecting the closing circuit when the closing signal remains active for too long.
This function improves operating stability and protects the mechanical operating mechanism from unnecessary repeated actions.
The blocking function prevents incorrect operation when control conditions are not satisfied.
When the secondary control power supply is not activated or does not meet the required voltage range, the blocking mechanism prevents unsafe closing operations.
This design improves operational safety in complex high-voltage environments.
The optional over-current tripping function provides intelligent fault protection.
The system receives three-phase current signals from the current transformer secondary side and compares them with preset values. When the current exceeds the setting value, the protection unit sends a trip signal to open the breaker and complete the fault protection process.
| Protection Function | Description |
| Current Detection | Monitors A, B, C phase current signals |
| Signal Comparison | Compares current values with preset settings |
| Trip Output | Activates breaker opening operation |
| Protection Result | Disconnects fault current safely |
Different projects may require different control circuit arrangements.
The product supports optional wiring configurations based on customer requirements, including combinations with anti-bounce function, blocking function, and operating power options.
| Configuration | Anti-Bounce | Blocking Function |
| Standard Control | Optional | Optional |
| Protection Configuration | Available | Available |
| Customized Wiring | According to project requirement | According to project requirement |
The flexible wiring design allows better integration with different protection and automation systems.
When using DC power operation, the polarity of the dashed box terminals should remain consistent.
The motor wiring polarity should follow the specified circuit diagram to ensure correct energy storage operation.
The wiring diagram represents the breaker under test position condition without energy storage and in the open state.
Correct wiring is essential for reliable operation of the control system.
The Usune 75 kV High Voltage Vacuum Circuit Breaker is developed for high-voltage distribution systems requiring dependable switching performance and long-term operation stability.
Its optimized mechanical structure, reliable vacuum interruption technology, and flexible control configuration make it suitable for power distribution projects where safety and reliability are key considerations.
For engineering companies and switchgear manufacturers, compatibility with existing systems is an important selection factor.
The standardized structure, multiple cabinet width options, and configurable control circuits simplify integration into different high-voltage switchgear solutions.
When selecting high-voltage circuit breakers, customers often need to balance operational requirements and protection functions.
| Comparison Item | Standard Configuration | Protection Configuration |
| Basic Switching Function | Available | Available |
| Anti-Bounce Function | Optional | Included when required |
| Blocking Protection | Optional | Available |
| Over-Current Protection | External requirement | Integrated option |
| System Safety Level | Standard operation | Enhanced protection |
Different power systems require different current capabilities.
| Rated Current Range | Recommended Application |
| 630A-1600A | Medium load distribution systems |
| 1600A-5000A | Higher capacity power systems |
Selecting the correct current rating helps improve system efficiency and prevent equipment overload.
| Parameter | Specification |
| Product Type | 75 kV High Voltage Vacuum Circuit Breaker |
| Series | VS1 |
| Installation Type | Fixed Type |
| Rated Current | 630A-5000A |
| Cabinet Width | 800mm / 1000mm |
| Interruption Technology | Vacuum Arc Interruption |
| Control Options | Anti-Bounce / Blocking / Over-Current Protection |
| Standards | IEC and GB |
| Certification | CE |
To ensure correct configuration, customers should provide complete technical requirements before ordering.
| Information | Purpose |
| Rated voltage | Confirm system voltage level |
| Rated current | Select suitable capacity |
| Cabinet dimensions | Ensure installation compatibility |
| Control voltage | Match operating system |
| Wiring requirements | Confirm optional functions |
| Protection requirements | Select additional modules |
Accurate technical information helps shorten engineering confirmation time and improves project efficiency.
Usune applies strict quality management throughout product development, manufacturing, and testing.
| Certification | Standard |
| Quality Management | ISO 9001 |
| Environmental Management | ISO 14001 |
| Occupational Safety Management | ISO 45001 |
| Electrical Standard | IEC and GB |
| Product Certification | CE |
These certifications demonstrate Usune's commitment to supplying reliable high-voltage electrical equipment for global customers.
Customers should consider rated voltage, rated current, cabinet compatibility, control requirements, and protection functions.
Yes. Functions such as anti-bounce control, blocking protection, and over-current tripping can be configured according to project requirements.
Correct mechanical matching reduces installation modifications and improves system integration efficiency.
The product can support anti-bounce control, blocking protection, and intelligent over-current tripping functions.
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No. 298, Wei 17th Road, Yueqing Economic Development Zone, Yueqing, Wenzhou City, Zhejiang Province, China
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