Yongce Group Co., Ltd.
Complete Product Introduction
1. Product Brief Introduction
The ZW8-12(G) outdoor high-voltage vacuum circuit breaker is an outdoor high-voltage switchgear for three-phase AC 50Hz power systems. Composed of operating mechanism, conductive circuit, insulation system, seals and housing, it has an integral three-phase box-type structure. It is applicable to 10kV power grid and urban network power systems for making and breaking rated current, overload current, fault current, short-circuit current and for other similar applications.
Executive standards: GB1984-2003《Alternating current circuit-breakers》; GB/T11022-1999《Common technical requirements for high-voltage switchgear and controlgear standards》; IEC62271-100《High-voltage alternating current circuit-breakers》.
2. Model Meaning & Explanation
The coding of the product model contains the core structural characteristics and parameter information of the circuit breaker. The specific meaning of each part of the model is as follows:
3. Normal Operating Environmental Conditions
- Ambient temperature: -40℃ ~ +40℃;
- Altitude: ≤ 3000m (if the altitude increases, the rated insulation level shall be adjusted accordingly);
- Ambient air may be polluted by dust, smoke, corrosive gas, steam or salt mist, with pollution grade Class M;
- Wind speed not exceeding 34m/s (equivalent to 700Pa on the cylindrical surface);
- Vibration from outside the switchgear and controlgear is negligible either from operation or ground;
- Special service conditions. If it needs to be used under conditions different from the specified normal operating conditions, please consult with us for confirmation.
4. Main Technical Parameters
| Serial No. | Item | Unit | Data |
|---|---|---|---|
| 01 | Rated voltage | kV | 12 |
| 02 | Rated current | A | 630, 1250 |
| 03 | Power frequency withstand voltage (1min) | kV | 42 |
| 04 | Lightning impulse withstand voltage (peak value) | kV | 75 |
| 05 | Rated short-circuit breaking current | kA | 16, 20, 25 |
| 06 | Rated short-circuit making current | kA | 40, 50, 63 |
| 07 | Rated peak withstand current | kA | 40, 50, 63 |
| 08 | 4s short-time withstand current | kA | 16, 20, 25 |
| 09 | Rated operating sequence | - | Open - 0.3s - Close - Open, 180s - Close - Open |
| 10 | Number of rated short-circuit current breaking operations | times | 30 |
| 11 | Mechanical life | times | 10000 |
| 12 | Rated voltage of energy storage motor | V | 220 |
| 13 | Rated operating voltage for special spring operating mechanism | V | DC or AC 220 |
| 14 | Rated current of overcurrent release | A | 5 |
| 15 | Allowable wear thickness of moving and static contacts | mm | 3 |
| 16 | Contact opening distance | mm | 11±1 |
| 17 | Over travel (length of contact spring compression) | mm | 13 |
| 18 | Three-phase closing/opening asynchronism | ms | ≤ 2 |
| 19 | Contact closing bounce time | ms | ≤ 2 |
| 20 | Average opening speed | m/s | 1.0±0.2 |
| 21 | Average closing speed | m/s | 0.7±0.15 |
| 22 | Opening time | s | 0.015-0.05 (total opening time: 0.03-0.06) |
| 23 | Closing time | s | 0.025-0.05 |
| 24 | Main circuit resistance | μΩ | ≤ 120 (with G ≤ 200) |
5. Overall Dimensions & Installation Dimensions
6. Ordering Notes
When placing an order for the ZW8-12(G) outdoor high-voltage vacuum circuit breaker, please provide the following information to ensure that the product meets the actual use requirements:
- Exact product model and specification (including rated current, rated short-circuit breaking current, etc.)
- Special requirements for operating environmental conditions (if any)
- Special technical requirements (such as operating mechanism type, voltage level, etc.)
- Requirements for overall and installation dimensions (if different from standard)
