SPG-12 Outdoor SF6 Load Break Switch (12kV)
The SPG-12 is a 12kV outdoor SF6 load break switch for 10kV distribution systems. Uses SF6 pressure-assisted arc blowing in a 304 stainless steel molded housing — low gas pressure means low heat, short extinguishing time, and long life. Features low gas pressure interlock (locks operation at 0.03-0.04 MPa with visual alarm), manual interlock for safe maintenance, and high-pressure explosion-proof relief (0.4-0.6 MPa with side venting, no solid particle ejection). Silicone rubber/epoxy resin insulation with APG integral vacuum casting — 20+ years outdoor proven. Every unit X-ray inspected. Triangle spring mechanism sealed in SF6 housing — rust-free, maintenance-free. Capable of zero-gauge-pressure rated current switching. 5,000 mechanical operations life.
产品特点
- 额定电压12kV——适用于10kV配电系统
- SF6压气式吹弧灭弧——低热量、快速灭弧、寿命长
- 优质304不锈钢模压壳体——年漏气率远优于国标
- 具备零表压合分额定电流能力
- 低气压联锁：0.03-0.04 MPa，带视觉报警指示
- 手动联锁装置确保检修安全
- 高压防爆泄压：0.4-0.6 MPa，侧面排气无固体颗粒飞出
- 硅橡胶/环氧树脂绝缘（APG真空浇注）
- 三角形弹簧机构密封于SF6壳体内——不生锈、免维护
- 每只成品逐一X光检查
- 机械寿命：5,000次
- 可配FTU实现配电自动化（FA/DA）
技术参数
| Rated Voltage | 12 kV |
| Rated Frequency | 50/60 Hz |
| Rated Current | 630 A |
| Rated Breaking Load Current | 630 A |
| Rated Closed Breaking Current | 630 A |
| Rated Short-Circuit Making Current (peak) | 50 kA |
| Rated Short-Time Withstand Current | 20 kA / 4s |
| Rated Cable-Charging Breaking Current | 10 A |
| Rated Earth Fault Breaking Current | 48 A |
| Lightning Impulse Withstand (phase-phase/earth) | 75 kV |
| Lightning Impulse Withstand (across isolating distance) | 85 kV |
| Power Frequency Withstand 1min (phase-phase/earth) | 42 kV |
| Power Frequency Withstand 1min (across isolating distance) | 48 kV |
| Rain Test Withstand Voltage | 34 kV |
| Rated Working Pressure | 0.07 MPa |
| Low Pressure Interlock | 0.03-0.04 MPa |
| High Pressure Explosion Relief | 0.4-0.6 MPa |
| Annual Leak Rate | ≤0.5% |
| SF6 Water Content | ≤150 PPM |
| Circuit Resistance (per phase) | ≤150 μΩ |
| Contact Distance | 41±3 mm |
| Contact Overtravel | 22±2 mm |
| Opening Speed | 1.9±0.2 m/s |
| Closing Speed | 1.9±0.2 m/s |
| Contact Closing Bounce Time | ≤3 ms |
| Phase-to-Phase Distance | 250±3 mm |
| Three-Phase Synchronization | ≤3 ms |
| Closing Time | <10 s |
| Opening Time | <10 s |
| Energy Storage Motor Power | 40 W |
| Mechanical Life | 5,000 operations |
| Operation Voltage | DC220V / DC24V / AC220V |
| Weight (Manual / Automatic) | 115 kg / 135 kg |
| Temperature Range | -25°C to +40°C |