SF6 Load Break Switches
SPG-24 Outdoor SF6 Load Break Switch (24kV)
The SPG-24 is a 24kV outdoor SF6 load break switch for 20kV distribution systems. Enhanced insulation levels with 125/145kV lightning impulse withstand. Same proven SF6 pressure-assisted arc blowing technology in 304 stainless steel housing. Available in 630A and 1250A rated current variants. Features all safety interlocks (low pressure, manual, explosion-proof relief). Silicone rubber/epoxy resin insulation with APG vacuum casting. Every unit X-ray inspected. 5,000 mechanical operations life.
Key Features
- 24kV rated voltage — for 20kV distribution systems
- Enhanced insulation: 125/145kV lightning impulse withstand
- Available in 630A and 1250A rated current variants
- SF6 pressure-assisted arc blowing — proven reliability
- 304 stainless steel molded housing
- Low gas pressure interlock: 0.03-0.04 MPa with visual alarm
- Manual interlock + high pressure explosion-proof relief
- Silicone rubber / epoxy resin insulation (APG vacuum cast)
- Triangle spring mechanism sealed in SF6 — maintenance-free
- Every unit X-ray inspected
- Mechanical life: 5,000 operations
- Compatible with FTU for 20kV distribution automation
Technical Specifications
| Rated Voltage | 24 kV |
| Rated Frequency | 50/60 Hz |
| Rated Current | 630 / 1250 A |
| Rated Breaking Load Current | 630 / 1250 A |
| Rated Closed Breaking Current | 630 / 1250 A |
| Rated Short-Circuit Making Current (peak) | 50 / 63 kA |
| Rated Short-Time Withstand Current | 20kA/4s, 25kA/4s |
| Rated Cable-Charging Breaking Current | 25 A |
| Rated Earth Fault Breaking Current | 48 A |
| Lightning Impulse Withstand (phase-phase/earth) | 125 kV |
| Lightning Impulse Withstand (across isolating distance) | 145 kV |
| Power Frequency Withstand 1min (phase-phase/earth) | 65 kV |
| Power Frequency Withstand 1min (across isolating distance) | 79 kV |
| Rain Test Withstand Voltage | 50 kV |
| Rated Working Pressure | 0.20 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 |
Applications
Urban distribution network sectionalizing (20kV)Tie switch applications for 20kV systemsRural distribution system control switchingRing network fault detection, isolation, and alarmDistribution automation with FTU
Standards Compliance
IEC 62271-103GB/T 10963
Reply within 12hISO / CE / CCC CertifiedOEM Available
Frequently Asked Questions
What is the rated voltage of the SPG-24 Outdoor SF6 Load Break Switch (24kV)?
The SPG-24 Outdoor SF6 Load Break Switch (24kV) has a rated voltage of 24 kV. Please refer to the technical specifications table above for complete electrical ratings.
What is the lead time for SPG-24 Outdoor SF6 Load Break Switch (24kV)?
Standard lead time for the SPG-24 Outdoor SF6 Load Break Switch (24kV) is approximately 30 days. Larger quantities or custom configurations may require additional production time. Contact our sales team for a precise delivery schedule.
Can the SPG-24 Outdoor SF6 Load Break Switch (24kV) be customized for OEM projects?
Yes, NAIJI Electric offers OEM and custom manufacturing for the SPG-24 Outdoor SF6 Load Break Switch (24kV). We can adjust specifications, branding, and configurations to meet project-specific requirements. Minimum order quantities apply.
What standards does the SPG-24 Outdoor SF6 Load Break Switch (24kV) comply with?
The SPG-24 Outdoor SF6 Load Break Switch (24kV) is designed and tested in accordance with IEC 62271-103, GB/T 10963. All products undergo rigorous factory testing before shipment.
Interested in SPG-24 Outdoor SF6 Load Break Switch (24kV)?
Get factory-direct pricing, technical specifications, and custom configuration options.