High voltage outdoor vacuum circuit breaker ZW37-40.5 is designed for three-phase alternative-current of frequency 50 Hz and voltage up to 40.5 kV electric circuits switching in normal and emergency operational modes
ZW37-40.5 general drawing:
1 Poles
2 Drive box
3 Control box
4 Frame
5 Vacuum chamber
6 Porcelain bushing
7 Insulation rod
8 Connecting rod
9 Countershaft
10 Upper lead wires
11 Lower lead wires
12 Main shaft
13 Spring mechanism
Galvanized drive and control box constructions does not require painting for corrosion resistance
Transformers can be produced with four windings
Technical data of ZW37-40.5
| Parameter | Values | |||
| Rated voltage [kV] | 40,5 | |||
| Rated current [A] | 630, 1250, 1600, 2000 | |||
| Rated short-circuit current [kA] | 20 | 25 | 31,5 | |
| Rated opening current [KA] | 50 | 63 | 80 | |
| Rated short-time thermal current, 4s [kA] | 20 | 25 | 31,5 | |
| Rated peak current [kA] | 50 | 63 | 80 | |
| Rated insulation level | One-minute withstand industrial frequency voltage [kV] | Across open contacts and phase to earth: 105 | ||
| Storm impulse test voltage [kV] | 190 | |||
| Rated operating sequence | C-0,3с-OC-180s-OC C-0,3с-OC-20s-OC | |||
| Rated short-circuit breaking current expected life number | 20 | |||
| Mechanical duration number | 10000 | |||
| Rated operating voltage [V] | AC and DC 110/220 | |||
| Secondary circuits rated voltage [V] | AC and DC 110/220 | |||