ZW7-40.5kV;1600A Outdoor vacuum circuit breaker

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Details
Serial number project   unit data
Rated voltage 40.5
      kV 95
2 Rated insulation level Power frequency withstand voltage dry kV
  Power frequency withstand voltage, wet kV 80
Lightning impulse withstand voltage (peak value) kV 185
3 Rated current   A 1250、1600、2000
4 Rated short-circuit breaking current   kA 20、25'31.5
5 Rated operating sequence      
6 Rated short-circuit current breaking times   次(times) 12
7 Rated short-circuit making current (peak value)      
8  Rated peak withstand current   kA  50、63、80
9  Rated short-time withstand current   kA  20、25、31.5
10  Rated short-circuit continuous current   S 4
1 1 Average opening speed 1.5±0.2
12 Average closing speed   m/s 0.7±0.2
13 Bounce time of contact closing   S ≤2
14 Synchronous time difference of three-phase combined (open) gate   s ≤2
15 Closing time   S ≤150
16 Opening time   S ≤60
17 Mechanical life   (times) 10000
18 Rated operating voltage and rated voltage of auxiliary circuit   V DC220、110、24
V AC220、110、24
         
19 DC resistance of each phase loop (without transformer)   M 0 ≤100
20 Allowable wear thickness of dynamic and static contacts   mm 3
21 weight   kg 800

 

Description

The ZW7 40.5 household external high voltage vacuum circuit breaker is used in a three-phase power system with an AC 50Hz and a voltage of 40.5kV. It is used for breaking and closing load currents, overload currents and short-circuit currents.

 

The main function

a. Using vacuum arc extinguishing, strong breaking capacity, long electrical life, and mechanical life of 10,000 times;
b. The structure is simple, maintenance-free, and non-overhaul period is long;
c. Good insulation performance and strong anti-pollution ability;
d. It can be equipped with spring or electromagnetic operating mechanism, with reliable mechanical performance and frequent operation; no fire and explosion hazards;
e. Built-in current transformer, accuracy of 0.2 level, can realize three mutual protection;
f. Condensation controller is included, which can keep the circuit breaker running reliably at a certain temperature and humidity.

 

Use environmental conditions

a. Ambient air temperature: upper limit ten 40℃, lower limit -30℃;
b. Altitude: at 2000m (if the altitude needs to be increased, the rated insulation level shall be increased accordingly)
c. Wind pressure: no more than 700Pa (equivalent to wind speed 34m/s)
d. Amplitude: earthquake intensity 8 degrees;
e Refining pollution level: Level III;
f. The maximum temperature difference: no more than 25T

 

Product model and meaning

Shape and installation dimensions

 

 

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