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Description
The ZW32-40.5/1250A is a high-performance outdoor vacuum circuit breaker designed for 40.5kV three-phase AC power systems with a frequency of 50Hz or 60Hz. It incorporates an advanced solid-sealed pole design and a highly reliable operating mechanism, making it ideal for application in medium-voltage overhead line grids to switch, break, and make load currents, overload currents, and short-circuit currents.
This breaker is engineered for exceptional reliability, minimal maintenance throughout its service life, high mechanical and electrical durability, compact size, and easy installation. Its robust construction ensures stable performance in diverse outdoor environments.
Environmental conditions
- Ambient temperature: -35℃~ +45℃;
- Relative humidity: monthly average 90%, daily average 95%;
- Saturated vapor pressure: Daily average value is no more than 2.2×10-3 MPa; Average monthly value is not more than 1.8×10-3 MPa; In high humidity temperature drop, may condensation;
- Altitude: ≤2000m;
- Earthquake intensity is not more than 8;
- There is no fire, explosion, serious pollution, chemical corrosion, and violent vibration;
- Can be also customized as the exact request.
Technical Data
| 1 | Rated voltage | kV | 40.5 | |
| 2 | Rated current | A | 1250/1600/2000/2500 | |
| 3 | Rated frequency | HZ | 50/60 | |
| 4 | Rated insulation level | Lightning impulse withstand voltage | kV | 185 |
| 1 min power-frequency withstand voltage | 80, 95/95 | |||
| 6 | Rated short-circuit breaking current | kA | 25/31.5 | |
| 7 | Rated short-circuit making current (peak value) | kA | 63/80 | |
| 8 | Rated short-time withstand current | kA | 25/31.5 | |
| 9 | Rated withstand current (peak value) | kA | 63/80 | |
| 10 | Rated operating sequence | O-0.3s-CO-180s-CO | ||
| 11 | Rated short-circuit duration | s | 4 | |
| 12 | Times of breaking with the rated short-circuit current | Times | 30 | |
| 13 | Mechanical life | 10000 | ||
| 14 | Mechanism control voltage | V | AC/DC220 | |
| 15 | 1min secondary circuit power frequency withstand voltage | kV | 2 | |
| 16 | Contact open distance | mm | 16 ±1 | |
| 17 | Contact Over-travel | mm | 4±0.5 | |
| 18 | Average opening speed | m/s | 1.4±1.8 | |
| 19 | Average closing speed | m/s | 0.4-0.8 | |
| 20 | Three phase simultaneity | ms | ≤2 | |
| 21 | Contact closing bounce time | ms | ≤5 | |
| 22 | Main circuit DC resistance per phases | μΩ | ≤80 | |
| 23 | Polar distance | mm | 460 ±2 | |
| 24 | Opening time | ms | ≤50 | |
| 25 | Closing time | ms | ≤100 | |
Outline Dimension
Outline & Mounting Dimensions
Typical Applications
The ZW32-40.5/1250A is versatile and widely used in:
- Utility Power Grids: Protection and control for 35kV urban and rural distribution overhead lines.
- Industrial Power Supply: Suitable for power plants, substations, and controlling/protecting electrical equipment and lines.
- Infrastructure Projects: Ideal for power distribution in industrial parks, city networks, and rural network upgrades.
- Remote & Temporary Sites: Provides reliable power protection for remote areas, railway construction sites, and field operations.
Why Choose Our ZW32-40.5/1250A?
We are a professional manufacturer specializing in high-voltage Vacuum switches. Our ZW32-40.5 series is backed by extensive technical expertise and a commitment to quality, ensuring you receive a product that meets stringent international standards like GB and IEC.
We offer customizable solutions, including various Current Transformer configurations, disconnecting switch options, and intelligent control functionalities to meet your specific project needs.
ZW outdoor vacuum circuit breaker display video ← Click to view the video
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