The ZW7-40.5 is an outdoor high-voltage intelligent vacuum circuit breaker designed for medium-voltage overhead power lines. It integrates split-pole structure with a highly reliable spring or Permanent Magnet operating mechanism, enabling efficient load current switching, overload protection, and short-circuit interruption. Ideal for smart grid applications, it ensures reliable power distribution and system stability.
Product Parameters
Item | Unit | Parameter |
Voltage, current parameters | ||
Rated voltage | kV | 40.5 |
Rated short time power frequency withstand voltage (1min) | kV | 95 |
Rated lightning impulse withstand voltage (peak) | kV | 185 |
Rated current | A | 1250, 1600, 2000 |
Rated short-circuit breaking current | kA | 25, 31.5 |
Rated operating sequence | O-0.3s-CO-180s-CO | |
Rated short-circuit current breaking times | times | 12 |
Rated short-circuit closing current (peak) | kA | 63.80 |
Rated peak withstand current | kA | 63.80 |
Rated short-time withstand current | kA | 25, 31.5 |
Rated short-circuit current duration | S | 4 |
Average opening velocity | ms | 1.5±0.2 |
Average closing speed | ms | 0.7±0.2 |
Contact closing bounce time | ms | <5 |
Three-phase close (open) synchronization error | ms | <2 |
Closing time | ms | <150 |
Opening time | ms | <60 |
Mechanical life | times | 10000 |
Rated operational voltage and auxiliary circuits rated voltage | V | DC220, AC220 |
DC resistance of circle every phase (not including transformer) | μΩ | <100 |
Dynamic, static contact allowed to wear thickness | mm | 3 |
Weight | kg | 800 |
1.Innovative Design
Split - pole structure paired with spring or permanent magnet mechanisms boosts reliability and cuts maintenance. Compact modular design eases installation and fits various grid setups.
2.Smart Functionality
Supports remote control and integrates with distribution automation. Intelligent controllers enable real - time monitoring and data analysis for better grid performance.
3.Robust Adaptability
Corrosion - resistant steel enclosure withstands harsh outdoors like humidity and extreme temps. High seismic resistance meets up to magnitude 8 requirements.
4.Versatile Applications
Suits substations, industrial plants, and urban/rural grids for line protection. Ideal for frequent - operation scenarios such as ring mains and branch lines.
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