Summary
The ZW7-40.5 type outdoor high-voltage vacuum circuit breaker is used for three-phase power system with AC 50Hz and voltage 40.5kV. It is used as breaking and closing load current, overload current and short circuit current.
major function
A. adopts vacuum arc extinguishing, has strong breaking ability, long electric life and 10000 times of mechanical life.
B. has a simple structure, no maintenance and long period of maintenance.
C. has good insulation performance and strong pollution prevention.
D. can be equipped with a spring or electromagnetic operating mechanism, with reliable mechanical properties and frequent operation, without fire and explosion hazards.
E. is equipped with a current transformer with a precision of 0.2 levels, which can realize three phase interactive protection.
The f. internal condensation controller can keep the circuit breaker running reliably at a certain temperature and humidity.
Use of environmental conditions
A. ambient air temperature: upper limit +40 C, lower limit -30 C;
B. altitude: less than 2000m (for higher altitude, is rated insulation level increase); C. pressure: not more than 700Pa (the equivalent wind speed 34m/s);
D. amplitude: earthquake intensity 8 degrees;
E. filth grade: II grade;
F. maximum daily temperature difference: no more than 25 degrees centigrade
Product model and its meaning
Main technical parameters
Shape and installation size
