SPV-24 Outdoor Vacuum Circuit Breaker (24kV)
The SPV-24 is a 24kV oil-free, SF6-free, maintenance-free outdoor vacuum circuit breaker by NAIJI Electric. Extended voltage class with enhanced insulation levels (125/145kV lightning impulse withstand). Same proven longitudinal magnetic field rotating arc technology and solid epoxy resin insulation (APG vacuum casting) as the SPV-12. Every unit X-ray inspected. Weighs only 2/3 of comparable products. Ideal for 20kV distribution systems and higher voltage applications.
Key Features
- 24kV rated voltage — higher insulation class, oil-free, SF6-free
- Enhanced lightning impulse withstand: 125/145kV
- Longitudinal magnetic field rotating arc — same proven technology as SPV-12
- Solid epoxy resin insulation (APG vacuum cast) — 20+ years outdoor proven
- Every unit 100% X-ray inspected
- Mechanical life: 10,000 operations
- Electrical life: 10,000+ operations at rated current
- Only 2/3 weight of comparable products
- Imported spring wire + bearing structure + zinc-nickel-cobalt alloy treatment
- Compatible with FTU for 20kV distribution automation
Technical Specifications
| Rated Voltage | 24 kV |
| Rated Current | 630 / 1250 A |
| Rated Frequency | 50 Hz |
| Rated Short-Circuit Breaking Current | 20 / 25 kA |
| Rated Peak Withstand Current | 50 / 63 kA |
| Rated Short-Circuit Making Current (peak) | 50 / 63 kA |
| Rated Short-Time Withstand Current | 20kA/4s, 25kA/4s |
| Rated Operating Sequence | O—0.3s—CO—180s—CO |
| Short-Circuit Breaking Operations | 20 times |
| Lightning Impulse Withstand (phase-phase/earth) | 125 kV (peak) |
| Lightning Impulse Withstand (across isolating distance) | 145 kV (peak) |
| Power Frequency Withstand 1min Dry (phase/earth · across gap) | 65 / 79 kV |
| Power Frequency Withstand 1min Wet (phase/earth · across gap) | 50 / 64 kV |
| Secondary Circuit Withstand Voltage | 2000 V |
| Contact Distance | 12±1 mm |
| Contact Overtravel | 3.5±1 mm |
| Opening Speed | 1.4±0.2 m/s |
| Closing Speed | 0.7±0.2 m/s |
| Contact Closing Bounce Time | ≤2 ms |
| Phase-to-Phase Distance | 380±1.5 mm |
| Three-Phase Synchronization | ≤2 ms |
| Circuit Resistance (per phase) | ≤70 μΩ |
| Closing Time | 25~60 ms |
| Opening Time | 20~40 ms |
| Energy Storage Motor Power | 40 W |
| Mechanical Life | 10,000 operations |
| Electrical Life | 10,000+ operations |
| Insulation Medium | Solid epoxy resin (APG vacuum cast) |
| Arc Extinguishing | Longitudinal magnetic field rotating arc |
| Temperature Range | -25°C to +40°C |
| Weight | 2/3 of comparable products |
| Maintenance | Maintenance-free |
Applications
Standards Compliance
Related Products
ZW32-12 Outdoor Vacuum Circuit Breaker
The ZW32-12 is a pole-mounted outdoor vacuum circuit breaker rated at 12kV, widely used in rural and urban power distribution networks. Features a compact spring-operated mechanism for reliable switching operations.
ZW32-24 Outdoor Vacuum Circuit Breaker (24kV)
The ZW32-24 is a 24kV outdoor vacuum circuit breaker with spring operating mechanism, rated at 630A with short-circuit breaking capacity up to 25kA. Widely used in hydropower stations, industrial substations, renewable energy grid connections, and rural/urban distribution networks. Control voltage options include 110VDC, 220VDC, and 220VAC. Fully compliant with IEC 62271-100.
SPV-12 Outdoor Vacuum Circuit Breaker (12kV)
The SPV-12 is a 12kV oil-free, SF6-free, maintenance-free outdoor vacuum circuit breaker pioneered by NAIJI Electric. Features three-phase pillar-type structure with longitudinal magnetic field vacuum arc extinguishing technology and solid epoxy resin insulation (APG vacuum casting). The spiral groove contacts produce a rotating magnetic field, accelerating ionized particle diffusion and reducing arc energy. Special alloy shielding rapidly absorbs arc energy for low heat, short extinguishing time, and long service life. Imported outdoor-grade epoxy resin with integral vacuum casting — proven by 20+ years of outdoor operation with no surface carbonization. Every unit X-ray inspected. Weighs only 2/3 of comparable products.
Frequently Asked Questions
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