Yongce Group Co., Ltd.
ZW32-12GG Dual Power Automatic Transfer Device Product Introduction
1. Product Brief Introduction
The ZW32-12GG dual power automatic transfer device (composed of single pole high voltage vacuum circuit breaker and double isolating switch) is developed to meet the increasingly high requirements of users for power supply reliability. In many occasions, two power sources are used to ensure power supply reliability, and this product is needed to achieve safe and reliable switching between two circuit power sources.
Applied in AC 50Hz, rated voltage 12kV, rated current up to 1250A dual power supply system, when one power source fails or loses voltage, it can automatically switch to the other normal power source to ensure the continuity of power supply. It has overcurrent and overloading protection functions to avoid secondary impulse voltage when the load fails. When the normal power source is restored, the electric switching device can automatically switch back to the normal power source to ensure reliability and safety. It can also perform forced switching between two power sources according to requirements, especially suitable for important occasions that do not allow power interruption, serving as an electrical control device to ensure continuous power supply, and is a motor-driven dual power automatic transfer device matched with high voltage vacuum circuit breakers.
The product is easy to use, has excellent performance, is safe and reliable, highly automated, and has a wide application range. It is suitable for oil fields, mining 10kV distribution circuits, and industrial and mining enterprise 10kV lines.
2. Normal Operating Environment
- Ambient air temperature: upper limit not exceeding +40℃, lower limit not lower than -25℃; the average temperature in 24 hours shall not exceed +35℃;
- Altitude of the installation site: not exceeding 2000m;
- Relative humidity of air: not more than 50% at a temperature of +40℃; higher humidity is allowed at lower temperatures; the monthly average minimum temperature is -25℃, and the monthly average maximum relative humidity is 90%, considering the condensation on the product surface caused by temperature changes;
- Pollution grade: Grade III;
- No strong vibration and impact at the operation site, no harmful gases that corrode metals and destroy insulation, no serious dust, no conductive particles and explosive substances.
3. Product Characteristics
- Automatic switching between dual power sources to ensure uninterrupted power supply for important loads;
- With overcurrent and overload protection functions, avoiding secondary impulse voltage when the load fails;
- Support forced switching between dual power sources as required, flexible in use;
- Easy to operate, high automation level, wide application range, suitable for various industrial and mining occasions;
- Safe and reliable performance, ensuring the stability of power supply system.
4. Main Technical Parameters
| Serial No. | Item | Unit | Data |
|---|---|---|---|
| 01 | Rated voltage | kV | 12 |
| 02 | Rated current | A | 630, 1250 |
| 03 | Rated short-circuit breaking current | kA | 20, 25 |
| 04 | Rated making current (peak value) | kA | 50 |
| 05 | Rated peak withstand current | kA | 50 |
| 06 | Rated short-time withstand current | kA | 20, 25 |
| 07 | Rated short-circuit duration | s | 4 |
| 08 | Rated insulation level | kV | Power frequency withstand voltage (dry type): phase to phase, phase to ground 75, break 85 |
| 09 | Lightning impulse withstand voltage (peak value): phase to phase, phase to ground 42, break 48 | ||
| 10 | Rated operating sequence | - | 0-0.3s-CO-180s-CO |
| 11 | Number of rated short-circuit current breaking times | times | 50 |
| 12 | Overcurrent release rated current | A | 1000 |
| 13 | Mechanical life | times | 3 |
| 14 | Allowable wear thickness of dynamic and static contacts | mm | 5 |
| 15 | Current transformer ratio | - | 200/5, 400/5, 600/5, 1250/5 |
| 16 | Contact stroke | mm | 9±1 |
| 17 | Contact overtravel | mm | 2±0.5 |
| 18 | Average opening speed | m/s | 1.0±0.2 |
| 19 | Average closing speed | m/s | 0.6±0.3 |
| 20 | Opening time | ms | 23-45 |
| 21 | Closing time | ms | 25-45 |
| 22 | Closing bounce time | ms | ≤2 |
| 23 | Three-phase closing asynchronism | ms | ≤2 |
| 24 | DC resistance of each phase loop | μΩ | ≤80 |
| 25 | Mass | kg | 135 |
5. Appearance and Installation Dimensions
6. Ordering Notes
When placing an order for the ZW32-12ZG dual power automatic transfer device, 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 environment (such as high altitude, special pollution grade, etc.);
- Requirements for current transformer ratio and protection functions;
- Special installation and use requirements (if any).
