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E-mail
barry@rockwill.cn
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Phone
+86-577-27869969
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Address
Wengyang Industrial Zone,Wenzhou City, Zhejiang Province,China.
Product Categories
Rockwill Electric GroupFree·1YRS
66kV 69kV 72.5kV Outdoor HV SF6 Circuit Breaker
NegotiableUpdate on October 02
- Model
- Nature of the Manufacturer
- Other
- Product Category
- The Outdoor Switchgear
- Place of Origin
- City, Province
Overview
66kV 69kV 72.5kV outdoor HV SF6 circuit breaker is a high voltage electric transmission and equipment which is manufactured by Rockwill in China.
Product Details
66kV 69kV 72.5kV outdoor HV SF6 circuit breaker is a high voltage electric transmission and equipment which is normally used in power grid system. It can open/close the rated current and fault current for realizing protection. It adopts latest design which has great quality for a long service life.
Environment Conditions:
1.Ambient temperature: -40℃--+ 50℃
2.Wind pressure:≤700 pa
3.Altitude:≤3000m
4.Seismic intensity:≤9degrees
5.Air polluted degree: level Ⅲ
| Item | Unit | Technical Data | |
| Rated voltage | kV | 72.5 | |
| Rated frequency | Hz | 50 | |
| Rated current | A | 3150 | |
| Rated short circuit breaking current | Short circuit current | kA | 31.5 |
| DC component | 40% | ||
| Duration of rated short time withstａnd current | s | 4 | |
| Rated short time withstａnd current | kA | 40 | |
| Rated short circuit making current (peak) | kA | 100 | |
| Rated peak withstａnd current | kA | 100 | |
| Rated 1 min power frequency withstａnd voltage (effective value) | To earth | kV | 140 |
| Breaking isolation | 160 | ||
| Rated lighting impulse withstａnd voltage (peak value) | To earth | 200 | |
| Breaking isolation | 220 | ||
| 5 min zero air pressure withstａnd voltage (effective value) | To earth, Breaking isolation | 75 | |
| Rated out of phase breaking current | kA | Ie×25% | |
| Breaking current of fault at close zone | Ie×90%,Ie×75% | ||
| Rated line charged breaking current | A | 50 | |
| Rated operation sequence | O-0.3s-CO-180s-CO | ||
| Constant of first opened pole | 1.5 | ||
| Closing time | ms | ≤145 | |
| Opening time | ≤60 | ||
| Breaking time | ≤60 | ||
| Closing-opening time | 60 | ||
| Symmetrical time of opening | 3 | ||
| Symmetrical time of closing | 5 | ||
| Rated pressure of SF6 gas (20℃） | Mpa | 0.5 | |
| SF6 annual leakage rate | ≤0.5% | ||
| Water content | ppm (v/v) | ≤150 | |
| Potential of wireless radio interference | μV | ≤2500 | |
| Mechanical life | times | 6000 | |
| Mass of each other | kg | 1200 | |
| Mass of SF6 for each breaker | 6 | ||
| Resistance of main circuit in each pole | μΩ | ≤80 | |
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