Yongce Group Co., Ltd.
Complete Product Introduction
1. Product Brief Introduction
The ZW7-40.5 series outdoor high-voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") is used in three-phase power systems with 50Hz AC and rated voltage of 40.5kV, for purposes such as combined load current breaking, overload current breaking and short-circuit current breaking.
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. Operating Environmental Conditions
- Ambient air temperature: upper limit +40℃, lower limit -30℃ (general area), -40℃ (high altitude area);
- Altitude: ≤1000m (if used in high altitude areas, the rated insulation level shall be increased accordingly);
- Wind pressure: not exceeding 700Pa (equivalent to wind speed 34m/s);
- Earthquake intensity: not exceeding 8 degrees;
- Pollution grade: Grade IV;
- Maximum daily temperature difference: not exceeding 25℃.
4. Product Characteristics
- Designed for 40.5kV three-phase AC power systems, suitable for outdoor installation and operation with reliable performance.
- Capable of breaking combined load current, overload current and short-circuit current, with excellent breaking capacity.
- Adaptable to harsh environmental conditions such as high altitude, strong wind and certain earthquake intensity, with good environmental adaptability.
- Meets the requirements of Grade IV pollution level, suitable for operation in areas with serious pollution.
5. Main Technical Parameters
| Serial No. | Item | Unit | Data |
|---|---|---|---|
| 01 | Rated Voltage | kV | 40.5 |
| 02 | Rated Insulation Level | kV | 1min Power Frequency Withstand Voltage - Dry: 95 |
| 1min Power Frequency Withstand Voltage - Wet: 80 | 1min Power Frequency Withstand Voltage - Wet: 80 | ||
| Lightning Impulse Withstand Voltage (Peak): 185 | Lightning Impulse Withstand Voltage (Peak): 185 | ||
| 03 | Rated Current | A | 1250; 1600; 2000 |
| 04 | Rated Short-Circuit Breaking Current | kA | 20; 25; 31.5 |
| 05 | Rated Operating Sequence | - | Open - 0.3s - Close - 180s - Open |
| 06 | Number of Rated Short-Circuit Breaking Times | times | 12 |
| 07 | Rated Peak Withstand Current (Peak) | kA | 50; 63; 80 |
| 08 | Rated Steady-State Withstand Current | kA | 20; 25; 31.5 |
| 09 | Rated Short-Time Withstand Current | s | 4 |
| 10 | Rated Short-Circuit Duration | s | 4 |
| 11 | Contact Travel | mm | 22±2 |
| 12 | Contact Opening Distance | mm | 4±1 |
| 13 | Average Opening Speed | m/s | 1.5±0.2 |
| 14 | Average Closing Speed | m/s | 0.7±0.2 |
| 15 | Three-Phase Closing Time | ms | ≤2 |
| 16 | Three-Phase Opening (Closing) Phase Difference | ms | ≤2 |
| 17 | Closing Time | ms | ≤150 |
| 18 | Opening Time | ms | ≤60 |
| 19 | Mechanical Life | times | 10000 |
| 20 | Rated Operating Voltage of Auxiliary Circuit and Control Circuit | V | DC110/220、AC110/220 |
| 21 | D.C. Resistance of Each Phase Circuit (Excluding Current Transformer) | μΩ | ≤100 |
| 22 | Weight | kg | 800 |
6. Outline and Installation Dimensions
7. Ordering Notes
When placing an order for the ZW7-40.5 series 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 operating environmental conditions (such as high altitude, special pollution grade, etc.)
- Requirements for auxiliary circuit and control circuit voltage
- Special technical requirements (if any)
