high voltage SF6 circuit breaker
1.SPF-12 outdoor AC high voltage SF6 circuit breaker
2.Self-Energized Rotary Arc
3.Stainless steel housing
4.High quality
Main Features of this product:
1. SPF-12 circuit breaker applies advanced Self-Energized Rotary Arc theory with SF6 as the insulation and arc medium. It is free-maintenance switch with good performance of arc and insulation, long life span and suitable for high altitude area.
2. The shell of the circuit breaker applies stainless steel (3mm) and it is welded with argon arc.
3. The explosion and pressure relieving device is installed in order to avoid the shell explosion of circuit breaker because of abnormal increase of inner pressure of the switch.
4. The low-pressure locking device is installed in order to lock the structure.
5. The hand locking device is installed to avoid incorrect manipulation efficiently in operation in power failure.
Main technical data:
No. | Item | Unit | Data | ||||
1 | Rated voltage | kV | 12 | ||||
2 | Rated insulation level (filled by , 0.25MPa, 20°C) | Rated lighting impulse withstand voltage | Phase-phase, phase earth | KV | 75 | ||
Across isolating distance | 85 | ||||||
1 min rated short-duration power-frequency withstand voltage | Phase-phase, phase earth | KV | 42 | ||||
Across isolating distance | 48 | ||||||
Rain test withstand voltage | KV | 34 | |||||
3 | Rated current | A | 400, 630, 1250 | ||||
4 | Rated short circuit breaking current (0.25MPa, 20°C) | kA | 16 | 20 | |||
5 | Different phase grounding reclosing breaking circuit | kA | 14 | 17.4 | |||
6 | Rated operating order | I |
| O-180s-CO-180s-CO | |||
II | O-0.3s-CO-180s-CO | ||||||
7 | Rated short circuit making current (peak) | kA | 40 | 50 | |||
8 | Rated withstand current (peak) | kA | 40 | 50 | |||
9 | Rated short-duration withstand current | kA | 16 | 20 | |||
10 | Rated short circuit duration | s | 4 | ||||
11 | Rated cable-charging breaking current | A | 25 | ||||
12 | Closing instantaneous speed | m/s | 2.6±0.2 | ||||
13 | Opening instantaneous speed | m/s | 2.6±0.2 | ||||
14 | Conducting rod total stroke | mm | 58±2 | ||||
15 | Conducting rod overtravel | mm | 22±1 | ||||
16 | Different period of three-phase break (close) valve | ms | ≤2 | ||||
17 | Each phase circuit resistance | μΩ | ≤130 | ||||
18 | Rated working pressure | MPa | 0.35 (20°C) | ||||
19 | Lowest working pressure | MPa | 0.35 (20°C) | ||||
20 | Annual leak rate | % | ≤1 | ||||
21 | Reliable operation | times | 6000 | ||||
22 | Water content in SF6 | PPM | ≤150 | ||||
23 | Weight | kg | 130 | ||||
