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Description
ZW7-40.5 outdoor vacuum automatic Circuit breakers is outdoor HV switching devices on three-phase AC 50Hz.lt is used for controlling and protecting 24-40.5KV transmission and distribution systems . It can be controlled to switch-on/off remotely, also be used to control energy storage and switch -on/off manually. Annexing a current transformer inside, it provides measurement and protection.
The breaker has porcelain post structure. The upper knob insulator has vacuum arc-extinguishing chamber while the nether one is post knob insulator Matching with spring or electromagnetic operating mechanisms, the breaker has high reliability of mechanical property and can be operated frequently. It has no burning and explosion hazard.
The breaker conforms to standards of GB1984-1989AC HV Breaker and IEC 56.IEC62271-100 HVAC Breaker. Its main features: excellent insulating property and strong anti soil performance. According to customer's requests, it can install Current Transformers inside. The measuring accuracy will be level of 0.2. And it realizes three-phase interaction protection.
Environmental conditions:
1. Ambient temperature: not higher than +40 °C, not less than -35°C
2. Altitude: not exceed 1000m.
3. Relative humidity: daily average of not more than 95%, month average of not more than 90%.
4. Earthquake intensity: not more than ten.
5. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration.
Technical Data
| 1 | Rated Voltage | kV | 40.5 | ||
| 2 | Rated current | A | 1250 | ||
| 3 | Rated short-circuit breaking current | kA | 20, 25, 31.5 | ||
| 4 | Rated short-circuit switching current (peak) | 50, 63, 80 | |||
| 5 | Rated short time withstand (thermal stability) current | 20, 25, 31.5 | |||
| 6 | Rated short time withstand (dynamic stability) current | 50, 63, 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 | 12 | ||
| 11 | Closing time | ms | ≤150 | ||
| 12 | Opening time | ms | ≤60 | ||
| 13 | Mechanical life | times | 10000 | ||
| 14 | Rated operating voltage | V | AC220,110 DC220,110 | ||
| 15 | Clearance between contacts | mm | 20+30 | ||
| 16 | Contacts over travel | mm | 5±1 | ||
| 17 | Average opening speed | m/s | 1.5±0.2 | ||
| 18 | Average closing speed | m/s | 0.7±0.2 | ||
| 19 | Contact closing bounce time | ms | ≤2 | ||
| 20 | Loop DC resistance of each phase | μΩ | ≤100 | ||
| 21 | Outline dimension of breaker (L*W*H) | mm | 2200*700*2500 | ||
| 22 | Total weight of breaker (with operating mechanism) | KG | 1100 | ||
Outline & Mounting Dimensions
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