Vacuum Circuit Breakers
Thanks to the cooperation with Siemens and Xiamen University, South China Electric has successfully developed and manufactured VSCE (I) vacuum circuit breaker. By adopting Siemens’ latest vacuum arc-extinguishing chamber and improved operating system, our vacuum interrupter ensures a good performance and has been universally used. All parts and components of our circuit breaker are precisely manufactured and well assembled, realizing an excellent coordination with minimized friction between moving parts, which is of vital importance to reliable operation. That’s why VSCE (I) vacuum circuit interrupter is featured by high insulating level, good vacuum leakproofness and exceptional endurance. This distinguished circuit interrupter has found wide application in energy infrastructure construction, power plant, commercial and residential buildings, industries and other fields.
Features
(1) High current breaking capacity
(2) Good insulation strength
(3) Lower contact resistance
(4) High vacuum degree
(5) Low chopping current
(6) Long lifespan
All vacuum circuit breakers have passed routine test, type test and special test by national labs. They also comply with national standards or client’s requirement. We will pick out unqualified products before delivery.
Parameters
| S.N.. | Item | Unit | Technical data | ||||
| 1. | Rated voltage | kV | 12 | ||||
| 2. | Rated insulation level | Rated short-time power-frequency withstand voltage (1 min) | 42 | ||||
| 3. | Rated lightning impulse withstand voltage (peak) | 75 | |||||
| 4. | Rated frequency | Hz | 50 | ||||
| 5. | Rated current | A | 630 | 630 | 1250 | 1250 | |
| 1250 | 1250 | 1600 | 1600 | ||||
| 2000 | 2000 | ||||||
| 2500 | 2500 | ||||||
| 3150 | 3150 | ||||||
| 4000 | 4000 | ||||||
| 6. | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 | |
| 7. | Rated short-circuit withstand current | 20 | 25 | 31.5 | 40 | ||
| 8. | Rated peak withstand current | 50 | 63 | 31.5 | 100 | ||
| 9. | Rated short-circuit making current (peak) | 50 | 63 | 80 | 100 | ||
| 10. | 4s thermal stability current | 20 | 25 | 31.5 | 40 | ||
| 11. | Rated dynamic stability current | 50 | 63 | 80 | 100 | ||
| 12. | Rated closing surge of capacitor bank | 12.5 (frequency ≤ 1000Hz) | |||||
| 13. | Rated breaking current of single/back-to-back capacitor bank | A | 630/400 | ||||
| 14. | Rated short-circuit continuous current | S | 4 | ||||
| 15. | Power-frequency withstand voltage of secondary circuit | V | 2000 | ||||
| 16. | Rated operating voltage | Closing coil | AC 110/220 DC 110/220 | ||||
| Opening coil | AC 110/220 DC 110/220 | ||||||
| Energy storage motor | AC 110/220 DC 110/220 | ||||||
| 17. | Opening time (rated voltage) | ms | 20~50 | ||||
| 18. | Closing time (rated voltage) | 30~70 | |||||
| 19. | Allowable accumulative wearing thickness of moving and fixed contacts | mm | 3 | ||||
| 20. | Energy storage time | s | < 15 | ||||
| 21. | Clearance between open contacts | mm | 6 ± 0.5 | 8 ± 1 | |||
| 22. | Contact travel | s | 3~4 | ||||
| 23. | Bouncing time of contact closing | ms | < 2 | ||||
| 24. | Asynchronous opening and closing of three-phase contacts | < 2 | |||||
| 25. | Average opening speed (0-1/3 opening) | ms | 0.9~1.3 | ||||
| 26. | Average closing speed (0-1/3 opening, contact closed) | 0.4~1.0 | |||||
| 27. | Rebounding amplitude of contact opening | mm | < 2 | ||||
| 28. | Resistance of primary conductive circuit | μΩ | < 55 (630A) | ||||
| < 45 (1250A) | |||||||
| < 35 (1600A~2000A) | |||||||
| < 25 (above 2500) | |||||||
| 29. | Contact pressure of contact closing | N | 2000 ± 200 (20kA) | ||||
| 2400 ± 200 (25kA) | |||||||
| 3100 ± 200 (31.5kA) | |||||||
| 4750 ± 200 (40kA) | |||||||
| 30. | Operation sequence | Opening-θ-closing and opening-180s-closing and opening | |||||
Technical Parameters of Energy Storage Motor
| Mode | Rated voltage | Rated input power (W) | Normal operating voltage range | Energy storage time at rated voltage (s) |
| ZYJ66-8D | 220V | 90 | 85~100% of rated voltage | ≤ 10 |
Technical Parameters of Closing and Opening Electromagnet
| Items | Closing electromagnet | Opening electromagnet | Latching electromagnet |
| Rated operating voltage (V) | 220 | 220 | 220 |
| Rated operating current (A) | 1.1 | 1.1 | 25mA |
| Rated operating power (W) | 242 | 242 | 2.7 |
| Normal operating voltage range | 85%-110% of rated voltage | 65%-110% of rated voltage, opening will fail if the voltage is lower than 30% of rated voltage | -- |
Model of Siemens Vacuum Arc Extinguishing Chamber for the Circuit Breaker
| S.N.. | Rated current (A) | Rated breaking current (kA) | Model of vacuum arc extinguishing chamber |
| 1 | 630 | 20 | VSA12-0-20 |
| 2 | 630, 1250 | 25/31.5 | VSA12-0-25/VSA12-0-31.5 |
| 3 | 3150, 4000 | 40 | VSA12-0-40 |
Supply Scope of VSCE (I) Intelligent Environment-Friendly Solid-Enveloped Vacuum Circuit Breaker
| In (A) | 630 | 1250 | ||||||
| Isc (kA) | 20 | 25 | 31.5 | 25 | 31.5 | 40 | 50 | |
| In (A) | 1600 | 2000 | ||||||
| Isc (kA) | 25 | 31.5 | 40 | 50 | 31.5 | 40 | 50 | |
| In (A) | 2500 | 3150 | ||||||
| Isc (kA) | 31.5 | 40 | 50 | 31.5 | 50 | 50 | ||
| In (A) | 4000 | |||||||
| Isc (kA) | 31.5 | 40 | 50 | |||||
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