Claire
Mr.Fu
Claire
China VS1-12/24 Indoor Withdrawable High-Voltage Vacuum Circuit Breaker Suppliers and Factory for Reliable Power Control
Type Designation
| 1 | Vacuum Circuit Breaker (VCB) |
| 2 | Design Number |
| 3 | Rated Voltage (kV) |
| 4 | Rated Current (A) |
| 5 | Rated Short-circuit Breaking Current (kA) |
Normal Use Environment
- Ambient air temperature: upper limit +40°C, lower limit -15°C
- Altitude: ≤1000m (if higher altitude is required, the rated insulation level shall be increased accordingly)
- Seismic intensity: not exceeding 8 degrees
- Daily average relative humidity of air not more than 95%, monthly average not more than 90%
- Locations without fire, explosion hazard, severe pollution, chemical corrosion, and violent vibration
Technical Parameters
| No. | Item | Unit | Value | ||||
| 1 | Rated Voltage | kV | 24 | ||||
| 2 | Rated Short-Time Power-Frequency Withstand Voltage (1min) | kV | 65/79 (Phase-to-Phase, Phase-to-Earth / Across Isolating Distance) | ||||
| 3 | Rated Lightning Impulse Withstand Voltage (Peak) | kV | 125/145 (Phase-to-Phase, Phase-to-Earth / Across Isolating Distance) | ||||
| 4 | Rated Frequency | Hz | 50 | ||||
| 5 | Rated Current | A | 630 1250 |
630 1250 1600 2000 2500 3150 | 630 1250 1600 2000 2500 3150 | ||
| 6 | Rated Short-Circuit Breaking Current | kA | 20/25 | 31.5 | 40 | ||
| 7 | Rated Short-Time Withstand Voltage | kV | 20/25 | 35.5 | 40 | ||
| 8 | Rated Short-Circuit Duration | S | 4 | ||||
| 9 | Rated Peak Withstand Current | kA | 50/63 | 80 | 100 | ||
| 10 | Rated Short-Circuit Making Current | kA | 50/63 | 80 | 100 | ||
| 11 | Auxiliary Circuit Power-Frequency Withstand Voltage (1min) | V | 200 | ||||
| 12 | Rated Single/Back-to-Back Capacitor Bank Breaking Current | A | 630/400 (40kA is 800/400) | ||||
| 13 | Rated Capacitor Bank Inrush Making Current | kA | 12.5 (Frequency Not Exceeding 1000Hz) | ||||
| 14 | Mechanical Life | time | 20000 | ||||
| 15 | Rated Current Breaking Operations (Electrical Endurance) | time | 20000 | ||||
| 16 | Rated Short-Circuit Current Breaking Operations | time | 50 (40kA ≤ 30) | ||||
| 17 | Permissible Cumulative Wear Thickness of Moving/Fixed Contacts | mm | 3 | ||||
| 18 | Energy Storage Time | S | ≤10 | ||||
| 19 | Contact Gap | mm | 16±1 | ||||
| 20 | Over-Travel | mm | 3.5±0.5 | ||||
| 21 | Contact Bounce Time During Closing | ms | ≤2 (40kA ≤ 3) | ||||
| 22 | Three-Phase Opening/Closing Non-Simultaneity | ms | ≤2 | ||||
| 23 | Average Opening Speed (From Contact Separation to 8mm) | m/s | 1.5±0.2 | ||||
| 24 | Average Closing Speed (From 8mm to Contact Closure) | m/s | 0.8±0.2 | ||||
| 25 | Main Circuit Resistance | μΩ | ≤50 (630A) ≤45 (1250A) ≤35 (1600–2000A) ≤25 (2500A and above) |
||||
| 26 | Rated Operating Sequence | O-0.3s-CO-180s-CO | |||||
Product Display
Outline and Installation Dimension
1. Drawing of Overall Dimensions for VS1-12 Withdrawable Type (Phase Distance 150mm) Circuit Breaker
| Rated Current (A) | 630 | 1250 |
| Rated Short-Circuit Breaking Current (kA) | 20, 25, 31.5 | 25, 31.5 |
| Matching Fixed Contact Size (mm) | Φ35 | Φ49 |
| Phase Distance (mm) | 150±1.5 | |
2. Drawing of Overall Dimensions for VS1-12 Withdrawable Type (Phase Distance 210mm) Circuit Breaker
| Rated Current (A) | 630 | 1250 | 1600 |
| Rated Short-Circuit Breaking Current (kA) | 20, 25, 31.5 | 25, 31.5, 40 | 31.5 |
| Matching Fixed Contact Size (mm) | Φ35 | Φ49 | Φ55 |
| Phase Distance (mm) | 210±1.5 | ||
3. Drawing of Overall Dimensions for VS1-12 Withdrawable Type (Phase Distance 275mm) Circuit Breaker
| Rated Current (A) | 1600, 2000 | 2500, 3150 |
| Rated Short-Circuit Breaking Current (kA) | 31.5, 40 | 31.5, 40 |
| Matching Fixed Contact Size (mm) | Φ79 | Φ109 |
| Phase Distance (mm) | 275±1.5 | |
4. Drawing of Overall Dimensions for ZN63A(VS1)-24 Fixed Type Circuit Breaker
| Rated Current (A) | 630 | 1250 | 1600 |
| Rated Short-Circuit Breaking Current (kA) | 20, 25, 31.5 | 25, 31.5, 40 | 31.5 |
| Matching Fixed Contact Size (mm) | Φ35 | Φ49 | Φ55 |
| Phase Distance (mm) | 275±1.5 | ||
| Rated Current (A) | 1600, 2000 | 2500, 3150 | 4000 |
| Rated Short-Circuit Breaking Current (kA) | 31.5, 40 | 31.5, 40 | 40 |
| Matching Fixed Contact Size (mm) | Φ79 | Φ109 | |
| Phase Distance (mm) | 275±1.5 | ||
Arc Extinguishing Principle
The ZN63A(VS1)-12/24 series circuit breaker utilizes a vacuum interrupter with a high degree of vacuum. During normal opening or short-circuit interruption, the moving contact is driven by the operating mechanism, causing it to separate from the fixed contact and generate an arc between them. Due to the special design of the moving and fixed contacts, an axial magnetic field is generated between them. This field controls the arc, causing it to burn uniformly and move across the contact surface while maintaining a low arc voltage. When the arc current naturally passes through zero, the remaining ions, electrons, and metal vapor, under the influence of the electromagnetic field, quickly recombine or condense on the contact surfaces and the shield. The dielectric strength across the interrupter gap is rapidly restored, thereby extinguishing the arc and achieving the purpose of interruption.
Frequently Asked Questions (FAQ)
Q
What is the rated voltage of the ZN63A(VS1)-24 Vacuum Circuit Breaker?
The rated voltage of the ZN63A(VS1)-24 Vacuum Circuit Breaker is 24 kV. The rated lightning impulse withstand voltage (peak) is 125/145 kV (phase-to-phase, phase-to-earth / across isolating distance), making it suitable for medium-voltage power distribution systems.
Q
What is the mechanical life of the VS1-12/24 Vacuum Circuit Breaker?
The VS1-12/24 Vacuum Circuit Breaker has a mechanical life of 20,000 operations. Likewise, the rated current breaking operations (electrical endurance) is also 20,000 times, ensuring long-term reliability and reduced maintenance requirements.
Q
What are the installation environment requirements for the VS1 series circuit breaker?
The VS1 series is designed for use where the ambient air temperature is between -15°C and +40°C, altitude does not exceed 1000 m, seismic intensity is not higher than 8 degrees, relative humidity is within specified limits, and there are no fire, explosion hazards, severe chemical corrosion, or violent vibration present.
Q
How does the VS1 series vacuum circuit breaker extinguish an arc?
The VS1 series uses a high-vacuum interrupter. When the contacts separate, an arc forms and is controlled by an axial magnetic field generated by the special contact design. This keeps the arc burning uniformly at low voltage. When current passes through zero, the remaining ions and metal vapor rapidly recombine or condense, restoring dielectric strength quickly and extinguishing the arc to complete the interruption.
Q
What rated current options are available for the VS1-24 Vacuum Circuit Breaker?
The VS1-24 Vacuum Circuit Breaker is available in a wide range of rated current options: 630 A, 1250 A, 1600 A, 2000 A, 2500 A, and 3150 A (up to 4000 A for fixed-type configurations), accommodating various load requirements in medium-voltage switchgear applications.
Q
What phase distance options are available for the VS1-12 withdrawable type circuit breaker?
The VS1-12 withdrawable type circuit breaker is available in three standard phase distance configurations: 150 mm, 210 mm, and 275 mm. Each configuration supports different combinations of rated current and short-circuit breaking current, allowing the breaker to be matched to a wide variety of medium-voltage switchgear panel designs.