ZW7-40.5/1250A outdoor vacuum circuit breaker power station type
product information
Product name: ZW7-40.5 outdoor vacuum circuit breaker
Category: high voltage components
Product introduction: ZN7-40.5 outdoor high-voltage true master circuit breaker is used in AC 50Hz, voltage 40.5kV three-phase power system, as a function of breaking and closing load current, overload current and short-circuit current.
Overview of ZW7-40.5 outdoor vacuum circuit breaker
The ZN7-40.5 outdoor high-voltage true master 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.
Main functions of ZW7-40.5 outdoor vacuum circuit breaker
a. Using vacuum arc extinguishing, strong breaking capacity, long electrical life, and mechanical life of 10,000 times;
b. Simple structure, rabbit maintenance, long period of non-overhaul
c. Good insulation performance, strong anti-fouling tree;
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, the instructor's accuracy can reach 0.2 level, which can realize three mutual protection;
f. Condensation controller is included, which can keep the circuit breaker running reliably at a certain temperature and humidity.
Environmental conditions for use of ZW7-40.5 outdoor vacuum circuit breaker
a. Ambient air temperature: upper limit +40℃, lower limit -30℃;
b. Altitude: ≤2000m (if the altitude needs to be increased, the rated insulation level will be increased accordingly);
c. Wind pressure: no more than 700Pa (equivalent to a wind speed of 34m/s);
d. Amplitude: earthquake intensity 8 degrees;
e. Pollution level: Level III;
f. Daily temperature difference: no more than 25℃
The main technical parameters
| Serial number |
project |
unit |
data |
| 1 |
Rated voltage |
kV |
40.5 |
| 2 |
Rated insulation level |
Power frequency withstand voltage |
Dry |
95 |
| Wet |
80 |
| Lightning impulse withstand voltage (peak value) |
185 |
| 3 |
Rated current |
A |
1250,1600,2000 |
| 4 |
Rated short-circuit breaking current |
KA |
20,25,31.5 |
| 5 |
Rated operating sequence |
|
Split -0.3s combined -180s combined |
| 6 |
Rated short-circuit current breaking times |
timcs |
12 |
| 7 |
Rated short-circuit making current (peak value) |
KA |
50,63,80 |
| 8 |
Rated peak withstand current |
|
| 9 |
Rated short-time withstand current |
KA |
20,25,31.5 |
| 10 |
Rated short-circuit continuous current |
S |
4 |
| 11 |
Average opening speed |
m/s |
1.5±0.2 |
| 12 |
Average closing speed |
0.7±0.2 |
| 13 |
Bounce time of contact closing |
S |
≤2 |
| 14 |
Three-phase combination (opening) gate synchronization time difference |
≤2 |
| 15 |
Closing time |
≤150 |
| 16 |
Opening time |
≤60 |
| 17 |
Mechanical life |
timcs |
10000 |
| 18 |
Rated operating voltage and rated voltage of auxiliary circuit |
V |
DC220,110,24 |
| AC220,110,24 |
| 19 |
DC resistance of each phase loop (without transformer) |
μΩ |
≤100 |
| 20 |
Allowable wear thickness of dynamic and static contacts |
mm |
3 |
| 21 |
weight |
kg |
800 |
