Products Description
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The withdrawable type vacuum circuit breaker is a type of switchgear used in power systems, primarily for controlling and protecting various distribution lines and equipment. Equipped with a manual trolley, it is easy and flexible to operate and is suitable for use in medium and low voltage distribution systems. It utilizes a high-quality vacuum interrupter chamber, offering excellent insulation performance and reliability, effectively ensuring stable and safe power supply
Easy Operation: The withdrawable type vacuum circuit breaker features guide rollers on the bottom for easy push and pull operation, greatly enhancing maintenance flexibility.
Safety and Reliability: Utilizing vacuum arc extinguishing technology, it achieves rapid arc extinguishing, significantly enhancing the safety and durability of the device.
Sturdy Construction: Utilizing high-strength steel welded together, the withdrawable type vacuum circuit breaker offers a stable structure and strong earthquake resistance.
Flexible Maintenance: The trolley can be completely removed from the equipment cabinet for easy inspection and replacement, significantly simplifying maintenance.
Adaptability: Suitable for a variety of environments and locations, meeting the needs of diverse systems.
Products Drawing
Product Application
Other locations requiring medium and low voltage power distribution protection
Control and protection of urban distribution networks
Power distribution systems in factories and industrial parks
Control cabinets in substations and substation equipment
Power distribution management in buildings
| Number | Parameter name | Unit | Technical Parameters | |||
| 1 | Rated voltage | kV | 12 | |||
| 2 | Rated short-time frequency withstand voltage (1 min) | kV | 42 | |||
| 3 | Rated lightning impulse withstand voltage (peak) | kV | 75 | |||
| 4 | Rated frequency | Hz | 50 | |||
| 5 | Rated current | A | 630/1250/1600/2000/2500/3150/4000 | |||
| 6 | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 |
| 7 | Rated short-time withstand current | kA | 20 | 25 | 31.5 | 40 |
| 8 | Rated short circuit duration | S | 4 | |||
| 9 | Rated short-circuit closing current | kA | 50 | 63 | 80 | 100 |
| 10 | Rated peak withstand current | kA | 50 | 63 | 80 | 100 |
| 11 | Number of rated short-circuit current starts | times | 30 | 30 | 30 | 20 |
| 12 | Rated individual capacitor bank opening current | A | ≤630 | |||
| 13 | Rated back-to-back capacitor bank opening current | A | ≤400 | |||
| 14 | Rated capacitor bank closing inrush current | kA | 12.5(frequency≤1000Hz) | |||
| 15 | Closing time | ms | ≤80 | |||
| 16 | Split time | ms | Maximum Voltage | ≤40 | ||
| ms | Rated Voltage | ≤50 | ||||
| ms | Minimum Voltage | ≤60 | ||||
| 17 | Time of ignition | ms | ≤15 | |||
| 18 | Mechanical life (M2) | times | 30000 | |||
| 19 | Allowable cumulative thickness of dynamic and static contact wear | mm | 3 | |||
| 20 | Rated closing operating voltage | V | AC/DC 220, AC/DC 110 | |||
| 21 | Rated breaking operating voltage | V | AC/DC 220, AC/DC 110 | |||
| 22 | Rated operating voltage of energy storage motor | V | AC/DC 220, AC/DC 110 | |||
| 23 | Rated power of energy storage motor | W | 80 (40KA Motor speed 100W) | |||
| 24 | Energy storage time | s | ≤15 | |||
| 25 | Contact opening distance | mm | 9±1 | |||
| 26 | Over traveling distance | mm | 3.5±0.5 | |||
| 27 | Contact closing bounce time | ms | ≤2 | |||
| 28 | Three-phase switching and closing non-synchronous | ms | ≤2 | |||
| 29 | Contact splitting rebound amplitude | mm | ≤3 | |||
| 30 | Contact closing contact pressure | kA | 20 | 25 | 31.5 | 40 |
| N±8% | 2200 | 2500 | 3100 | 4750 | ||
| 31 | Average breaking speed (contacts separated by 6mm) | m/s | 1.1±0.2 | |||
| 32 | Average closing speed (6mm contact closure) | m/s | 0.6±0.2 | |||
| 33 | Dominant electric circuit resistance | A | 630 | 1250 | 1600-2000 | ≥2500 |
| 34 | μΩ | ≤50 | ≤45 | ≤35 | ≤25 | |
| Rated operating sequence (1) 20~31.5KA | Minutes - 0.3s - combined minutes - 180s - combined minutes | |||||
| 35 | Rated sequence of operation (2) 40KA | Minutes - 0.3s - combined minutes - 180s - combined minutes | ||||
| Secondary circuit frequency withstand voltage (1min) | V | 2000 | ||||
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