Introduction info
ZW7-40.5 model outdoor high voltage vacuum circuit breaker was used to AC 50Hz, 40.5kV 3-phase electric system as breaking, linking load current, overload current and short current.
Normal service condition
| Altitude | ≤1000m |
| Ambient temperature | Max | +40℃ |
| Min | -15℃ |
| Ambient humidity: Maximum average humidity | 24 hour ≤95% |
| 1 month ≤90% |
| Maximum water vapor pressure | 24 hours ≤2.2kpa |
| 1 month ≤1.8kpa |
The ambient air has no obvious pollution of dust smoke, corrosive or combustible gases, steams or smog
Technical Parameters
| No. | Specifications | Unit | Value |
| 1 | Rated Voltage | kV | 40.5 |
| 2 | Rated current | A | 1600 |
| 3 | Rated short-circuit breaking current | kA | 31.5 |
| 4 | Rated short-circuit switching current (peak) | 80 |
| 5 | Rated short time withstand (thermal stability) current | 31.5 |
| 6 | Rated short time withstand (dynamic stability) current | 80 |
| 7 | Rated short-circuit duration time | s | 4 |
| 8 | Rated insulating level | Power frequency withstand voltage (1 min) | Dry-type | kV | 95 |
| Wet-type | 80 |
| Lightning impulse withstand voltage (peak) | kV | 185 |
| 9 | Rated operating sequence | | O-0.3s-CO-180s-CO |
| 10 | Breaking time of rated short-circuit breaking current | Times | 20 |
| 11 | Breaking time (with spring operating mechanism) | ms | ≤80 |
| 12 | Mechanical life | times | 10000 |
| 13 | Rated operating voltage | V | AC220 DC220 |
| 14 | Clearance between contacts | mm | 20+30 |
| 15 | Over stroke of contacts | mm | 5±1 |
| 16 | Bounce time | ms | ≤5 |
| 17 | Loop DC resistance of each phase | μΩ | 120 |
| 18 | Outline dimension of breaker (L*W*H) | mm | 2200*700*2500 |
| 19 | Total weight of breaker (with operating mechanism) | kg | 1100 |
About us
Qingdao Hengfengyou Electrical Engineering Co. , Ltd. is one of the large-scale electric complete
sets of manufacturers in China, specializing in oil-immersed transformers, dry-type transformers,
high-voltage Cabinets, low-voltage cabinets and substation manufacturing specialized electrical
enterprises. The company is located in the beautiful coastal city of china-qingdao. The company
has a registered capital of 10 million yuan, 20 senior technical personnel, more than 500 employees,
and a sound sales and service system, annual output value of US $1 billion, the products sell well
at home and abroad.
