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:
♦ Maximum wind speed is 10km/h, minimum wind speed for the rated level (132/230kv) is 3.2km/h;
♦ Earthquake intensity:
♦ Minimum nominal creepage distance: 31mm/kV;
♦ Air pollution degree: Class IV.
Main Technical Parameters
| No | Item | Unit | Value | |
| 1 | Rated voltage | kV | 40.5 | |
| It is | 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 | -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 |
| twenty one | Closing time | ms | 50≤t≤200 |
| twenty two | Opening time | ms | 30≤t≤60 |
| twenty three | Each phase main circuit DC resistance (not includeCT internal resistance) | mΩ | ≤100 |
| twenty four | 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
