ZW7-40.5 outdoor HV vacuum circuit breaker is a 3-phase AC 50Hz 40.5kV outdoor switch equipment.
♦ Installation way: foundation installation;
♦ Operating mechanism: spring operating mechanism and electromagnetic operating mechanism;
♦ Pole material: silicone rubber, ceramic;
♦ Application: outdoor 33kV substation, power plant.
♦ Current transformer: in-buit installation, external installation.
Product Standards
♦ IEC62271-100 High Voltage Switchgear and Controlgear Part 100: AC Circuit-breakers
♦ GB1984 High Voltage AC Circuit-breakers
♦ GB/T11022 Common Specifications for High-voltage Switchgear and Controlgear Standards
♦ JB/T 3855 High Voltage AC Vacuum Circuit-breakers
♦ DL/T402 Specification of High-voltage AC Circuit-breakers
Environmental Conditions
♦ Ambient temperature: -40°C~+40°C;
♦ Altitude: <1000m;
♦ Maximum wind speed is 10km/h, minimum wind speed for the rated level (132/230kv) is 3.2km/h;
♦ Earthquake intensity: <8 level;
♦ Minimum nominal creepage distance: 31mm/kV;
♦ Air pollution degree: Class IV.
Main Technical Parameters
| No |
Item |
Unit |
Value |
|
| 1 | Rated voltage |
kV |
40.5 |
|
| e | Ratedinsulationlevel | 1 min power frequencyDry test (fracture, inter-phase, to earth)Wet test (to earth, external insulation) |
kV |
95 85 |
| Lightning impulse withstand voltage(peak) |
185 |
|||
| 3 | Rated current |
A |
1250, 1600, 2000, 2500 |
|
| 4 | Rated short circuit breaking current |
kA |
20, 25, 31.5 |
|
|
No |
Item |
Unit |
Value |
| 5 | Rated short circuit making current (peak) |
kA |
50, 63, 80 |
| 6 | Rated peak withstand current |
kA |
50, 63, 80 |
| 7 | Rated short time withstand current |
kA |
20, 25, 31.5 |
| 8 | Rated operating sequence |
O-0.3S-CO-180S-CO |
|
| 9 | Rated short circuit breaking current breaking number |
times |
20 |
| 10 | Rated short circuit duration | s |
4 |
| 11 | Breaking time | s |
≤0.09 |
| 12 | Mechanical life |
times |
10000 |
| 13 | Newly manufactured vacuum interrupter |
Ps |
≤1.33×10-3 |
|
Vacuum interrupter during 20-year storage time |
<6.6×10-2 |
||
| 14 | Circuit breaker net weight |
kg |
800 |
| 15 | Clearance between open contacts |
mm |
22±2 |
| 16 | Contact travel |
mm |
4±1 |
| 17 | Average opening speed |
m/s |
1.4-1.7 |
| 18 | Average closing speed |
m/s |
0.4-0.7 |
| 19 | Contact closing bounce time |
ms |
≤3 |
| 20 | Inter-phase opening and closing synchronism |
ms |
≤2 |
| 21 | Closing time |
ms |
50≤t≤200 |
| 22 | Opening time |
ms |
30≤t≤60 |
| 23 | Each phase main circuit DC resistance (not includeCT internal resistance) |
μΩ |
≤100 |
| 24 | Dynamic and fixed contact cumulative thickness allowed to wear |
mm |
3 |
|
25 |
Rated contact pressure |
N |
2500±200 |
General Structure Drawing and Installation Size (unit: mm)
♦ Side-mechanism type
♦ Mid-mechanism type
