ZW7-40.5 outdoor HV vacuum circuit breaker
- Brand:
- Type: ZW7-40.5
Summary
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: rubber silicone, ceramic;
♦ Application: outdoor 33kV substation, power plant.
♦ Current transformer: internal 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℃~+40℃;
♦ 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.
Technical Specifications
No.
Item
Units
Parameters
1
Rated voltage
kV
40.5
2
Rated
insulation
level
1min power frequency
withstand voltage
dry
95
wet
80
Lightning impulse withstand voltage (peak)
185
3
Rated current
A
1250、1600、2000
4
Rated short-circuit breaking current
kA
20、25、31.5
5
Rated operating sequence
O－0.3s -CO- 180s-CO
6
Rated short-circuit breaking current breaki ng times
Times
12
7
Rated short- circu it closed current (peak)
kA
50、63、80
8
Rated peak withstand curren t
9
Rated short-time withstand current
kA
20、25、31.5
10
Rated short-circuit duration
S
4
11
Average opening speed
m/s
1.5 ± 0.2
12
Average closing speed
0.7 ±0.2
13
Contact closing bounce duration
s
≤2
14
Three phase closing and opening synchronism
≤2
15
Opening time
≤150
16
Closing time
≤60
17
Mechanism life
Times
10000
18
Rated operating voltage and aux ilia ry loop rated voltage
V
DC220 、1 10 、24
AC220 、110 、24
19
Phase loop DC resistance (without current transformer）
uΩ
100
20
Permitted accumulate wear－thickness of dynamic and static contact
mm
3
Model Implication
Overall Dimensions
