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 |
