Product Description

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) 100
20 Permitted accumulate wear-thickness of dynamic and static contact mm 3

Model Implication

Overall Dimensions