| Breaking Capacity: | High Voltage Circuit Breakers |
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| Operation: | Energy-storage Type |
| Speed: | High-Speed Circuit Breaker |
| Arc-extinguishing Medium: | Vacuum |
| Installation: | Insert |
| Structure: | Withdrawable |
| Samples: |
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| Customization: |
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| No | Item | Unit | Parameter | |
| 1 | Rated voltage | kV | 12/17.5 | 24 |
| 2 | Rated frequency | Hz | 50/60 | |
| 3 | Rated current | A | 630, ...4000A | |
| 4 | 1min Power frequency withstand voltage | kV | 48 | 65 |
| 5 | Lightning impulse withstand voltage | kV | 75/95 | 125/150 |
| 6 | Rated short circuit breaking current (peak) | kA | 50/63/80/100 | |
| 7 | Rated active load and close circuit breaking current | A | 63 | 50 |
| 8 | Rated short breaking current | kA | 20, …40 | |
| 9 | Rated short circuit making current (peak) | kA | 50/63/80/100 | |
| 10 | Rated cable(line) charging breaking current | A | 50 and 10 | |
| 11 | Rated capacitor bank switching current | A | 400 | |
| 12 | Rated withstand current (peak) | kA | 50/63/80/100 | |
| 13 | Short time withstand current (4s) | kA | 20, …40 | |
| 14 | Mechanism life | times | 10000 | |
| The circuit-breaker VD4-12(24) is the newest equipment in the voltage class of 12kV up to 24kV manufactured by Zhejiang Farady Electric Co., Ltd. It is universal used in power distributing and transforming systems of power stations, power generators, and secondary substations of mines, industries and infrastructures. The circuit-breaker VD4-12(24) has complete type specifications: the rated voltage is 12kV, the rated current is up to 4000A and the rated short circuit breaking current is up to 50kA. The circuit-breaker VD4-12(24) is equipped with modularized spring operating mechanism which has characteristic of more convenient maintenance, rapider replacing of parts and more reliable performance. The circuit-breaker VD4-12(24) adopts embedded poles that the vacuum interrupter with low resistance and the primary main electrical circuit are cast in insulating cylinders by epoxy resin. This structure makes the breaker have more reliable insulation. The embedded poles of circuit-breaker VD4-12(24) have the technique of ventilation and convection. Besides, the vacuum interrupter is with low resistance. All of these reduce the power consumption and the temperature rising due to the longtime running of circuit-breaker. The circuit-breaker VD4-12(24) has perfect performance when it is breaking short-circuit current or being operated frequently. Beside that it also has the functions of automatic reclosing and reliable operating. The driving mechanisms of circuit-breaker VD4-12(24) are designed by professionals in CooperNature and with characteristic of reliable closing performance, low impact force and longer lifetime. The mechanical lifetime can be up to 30000 cycles. All of the mechanism's surface of circuit-breaker VD4-12(24) is disposed with special process and lubricative technique. Not only the rust-resistance capability is improved but also the operating performance is ensured. The circuit-breaker is also applicable to humid and hot regions. The circuit-breaker VD4-12(24) has been through the whole type test in accordance with the standards of GB and IEC. |
| Damper with perfect performance Thanks to the refined damper with perfect performance and the new cam gear with curvilinear design, the contacts rebounding value during the breaker opening is reduced more and the breaker can be opened reliably. Besides, the bellows in vacuum interrupter are avoided to be broken down due to contacts over bounding and also the mechanical lifetime of operating mechanism is ensured. Special design of repair without many tools During the design for VD4 circuit-breaker, the installation and repair must be taken into account. So for the disassembly of parts or accessories, users need no special tools and the repair becomes more convenient. Besides, all of the secondary controlling components are in front of the operating mechanism, which also make maintenance and repair convenient. Modularized operating mechanism Modularized operating mechanism is another feature of VD4. It can be divided into closing module, opening module, mainaxis module and secondary wiring module, which make the mechanism have characteristic of standard manufacture method, short producing period, convenient maintenance and rapid replacing. These modules are standard and applicable to all VD4 so the costs of facilities management and maintenance are reduced. Self- lubricative bearing without oil Self-lubricative bearing without oil used for VD4 circuit-breaker is very applicable to over-load and low-speed conditions and avoids the lost-lubricative phenomena due to oil-lubricative bearing out of work for a long time. The free-maintenance can be realized accordingly. Conductors with silvered surface All the conductors of VD4 circuit-breaker are disposed by silvered process so that it do not only reduce the contacting resistance but also improve the electricity-conducting capacity of conductors. Thanks to the reduced resistance the heat from circuit-breaker running can be decreased and the breaker's lifetime is also lengthened. |
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