ZN12 Indoor AC HV Vacuum Circuit breaker
Base on the technology of Germany Siemens, ZN12-40.5 Indoor AC HV Vacuum Circuit breaker is developed. It is an indoor switchgear used for the power system with 40.5 kV rated voltage, three-phase AC 50 Hz. The circuit breaker is able to be operated frequently and break the false short circuit current for many times. It is not only suitable for trolley switchgear but for fixed switchgear to protect and control the apparatus in industrial and mining field, enterprises, power plant and substation.
Features:
High breaking capability, long endurance. Adopting integration spring operating mechanism, it is simple in structure, small in size and reliable in performance. The main galvanic circle and operating mechanism is in front and back arrangement and they are flexible and easily mounted. It is simple and reliable with mechanical and electrical interlocking. It adopts plateau design and it has good insulation level.
| No. | Name | Unit | Technical parameter |
| 1. | Rated voltage | KV | 40.5 |
| 2. | Rated current | A | 1250,1600,2000,2500 |
| 3. | Rated short circuit breaking current | KA | 25 | 31.5 |
| 4. | Peak withstand current | 63 | 80 |
| 5. | Short time current (4s) | 25 | 31.5 |
| 6. | Rated short circuit making current | 63 | 80 |
| 7. | Rated short circuit breaking times | Times | 30 | 30 |
| 8. | Operating sequence | | O-0.3s-CO-180s-CO |
| 9. | Lightning impulse withstand voltage | KV | 185 |
| 10. | Rated short time power frequency withstand voltage(1min) | 95 |
| 11. | Closing time | Ms | <=90 |
| 12. | Opening time | <=70 |
| 13. | Energy stored time | S | <=15 |
| 14. | Mechanical endurance | Times | 10000 |
| 15. | Rated current breaking times | 10000 |
| 16. | Energy stored electric machine rated frequency | W | 275 |
| 17. | Energy stored electric machine rated voltage | V | DC110 AC/DC220 |
| 18. | Making electromagnet rated voltage | DC110 DC220 |
| 19. | Making electromagnet rated resistance | ¦¸ | 57.7 247 |
| 20. | Making electromagnet rated current | A | DC1.91 DC0.89 |
| 21. | Over current release current | 5 |
| 22. | Auxiliary switch rated current | AC10 DC5 |
| 23 | Contact moving distance | Mm | 25(+ or -)2 |
| 24 | Contact travel | 8(+ or -)2 |
| 25 | Closing speed | M/s | 1.0 to 1.8 |
| 26 | Opening speed | M/s | 1.0 to 1.8 |
| 27 | Contact closing bouncing time | Ms | <=2 |
| 28 | Phase to phase central distance | Mm | 350,400,460 |
| 29 | Asynchronization of making contact | Ms | <=2 |
| 30 | Each phase main circuit resistance | ¦Ì¦¸ | <=40 |
| 31 | Wear thickness allowance of moving contact and static contact | Mm | <=3 |
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Ningbo Ville Electric Co., Ltd. is a company specialized in research, development and production of transformer and high voltage & low voltage electrical power equipment.
It locates in Hi-technical enterprise R & D center zone of Ningbo, Zhejiang province, which is one of the well-know coastal city in China. Its professional engaged in turnkey project contractor of power substation, power plant project and electric power complete equipments.
Working field: Manufacturing, engineering, designing, executing and commissioning for HV and LV electrical products.
Products application:
Power-fossil fuel plant, Steel plant, Infrastructure- railway, international generation, substation, hydropower station, wind power substation, transmission and distribution.
We has excellent experience and good capacity in complete projects equipments in Generation, Substation, Transmission and Distribution from 400V-330kv, especially in Power plant, Substation construction and Transmission line, including of design, complete equipment, installation, Commissioningand after-sales service, and also design the complete Electrical Solutions according to customer's demand. We are mainly services to International State Power Board, Power Construction Contractor, Power Project Contractor, Factories and the Electric Power Project in the world.
In order to achieve the enterprise's strategic target---being stronger, larger, and superior, we continue to expand throughout the world's markets for power transmission and distribution area. And we also actively attach our team to competition, walking forward to the mission of "First-class worldwide electrical equipment supplier"
