ZW8-12(G) Outdoor High-Voltage Vacuum Circuit Breaker
The ZW8-12(G) series outdoor high-voltage vacuum circuit breaker is a three-phase, 50Hz AC outdoor high-voltage switching device. It consists of an operating mechanism, a conductive circuit, an insulation system, sealing components, and an enclosure, featuring a three-phase common-tank design. It is intended for use in 10kV rural and urban power distribution networks to make and break load currents, overload currents, and short-circuit currents, as well as for other similar applications.
Applicable standards: GB1984-2003 "High-voltage alternating-current circuit-breakers," GB/T 11022-1999 "Common specifications for high-voltage switchgear and controlgear standards," and IEC 62271-100 "High-voltage alternating-current circuit-breakers."
Model and Meaning
Main Technical Parameters
| Project | Unit | Data | |
| Rated voltage | KV | 12 | |
| Rated current | A | 630 1250 | |
| 1-min power frequency withstand voltage | 42 | ||
| Lightning impulse withstand voltage(peak value) | KV | 75 | |
| Rated short circuit breaking current | KA | 16 20 25 | |
| Rated short circuit closing current | 40 50 63 | ||
| Rated peak withstand current | KA | 40 50 63 | |
| 4s short time withstand current | 16 20 25 | ||
| Rated operating sequence | Open - 0.3s - Close/Open - 180s - Close/Open | ||
| Rated short circuit current breaking times | times | 30 | |
| Mechanical life | 10000 | ||
| Rated operating voltage with dedicated spring operating mechanism | trip coil | V | DC or AC 220 |
| closing coil | V | DC or AC 220 | |
| Rated current of overcurrent release device | A | 5 | |
| Allowable wear thickness for fixed and moving contacts | mm | 3 | |
| Contact gap | mm | 11±1 | |
|
Overtravel (contact spring compression) |
mm | ||
| Three pole asynchronous closing and opening | ms | ≤2 | |
| Contact closing bounce time | ms | ≤2 | |
| Average opening speed | m/s | 1.0±0.2 | |
| Average closing speed | m/s | 0.7±0.15 | |
| Opening time | under the highest operating voltage | s | 0.015-0.05 |
| at the lowest operating voltage | s | 0.03-0.06 | |
| Closing time | s | 0.025-0.05 | |
| Main circuit resistance | μΩ | ≤120(with G ≤200) | |
Appearance and installation dimensions
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Contact Us
For inquiries, pricing, or technical specifications regarding the ZW8-12(G) Series Vacuum Circuit Breaker, please contact us:pannie@hdswitchgear.com.
FAQs about ZW8-12(G) Series
Q: What is the main application of this circuit breaker?
A: It is designed for 12kV power distribution systems, mainly used in outdoor rural power grids, industrial enterprises, and substations for switching load and short-circuit currents.
Q: What is the standard control voltage?
A: The standard voltage for both the trip coil and closing coil is DC or AC 220V. Other voltages are available upon request.
Q: Can you supply customized specifications?
A: Yes, we can customize the rated current, breaking capacity, and control voltage according to your project requirements.
Q: How can I get a quotation?
A: Please send your technical requirements or inquiry list to [pannie@hdswitchgear.com]. We will reply within 24 hours.
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