Outdoor HV vacuum circuit breaker manufacturer 24kV 36kV 40.5kV
Key attributes
| Brand | ROCKWILL |
| Model NO. | Outdoor HV vacuum circuit breaker manufacturer 24kV 36kV 40.5kV |
| Rated voltage | 40.5kV |
| Rated normal current | 1250A |
| Rated frequency | 50/60Hz |
| Series | RVB |
Product descriptions from the supplier
Description
Product Overview
Our 36kV Outdoor High-Voltage Vacuum Circuit Breaker is a robust AC three-phase switching device engineered for 50Hz power systems with a rated voltage of 36kV. Primarily deployed in rural and urban substations and 36kV distribution grids, it safely opens and closes load current, overload current, and short-circuit current to protect critical power infrastructure. Featuring porcelain insulation for superior anti-condensation, aging resistance, and temperature tolerance, this outdoor breaker delivers reliable performance in harsh environments. Compliant with IEC 62271-100, it is optimized for pole-mounted or substation applications, making it an ideal choice for global power grid operators, contractors, and bulk procurement projects.
Core Features
This 36kV outdoor vacuum circuit breaker is designed for durable, maintenance-friendly operation in outdoor power distribution systems. Its core features include:
- Porcelain Insulation: Utilizes high-grade porcelain as the primary insulation material, offering excellent resistance to condensation, aging, and extreme temperatures for long-term reliability.
- Compact & Reliable Design: Integrates a vacuum arc-extinguishing chamber, insulating rod, connecting rod, and three-pole epoxy pillar within a single mechanism casing, ensuring a small footprint and high operational stability.
- Flexible Installation: Suitable for both pole-mounted and substation applications, with a robust structure that adapts to diverse outdoor deployment scenarios.
- Weatherproof Protection: Equipped with a waterproof control box and built-in heater to prevent moisture buildup in the control room, eliminating performance issues in high-humidity environments.
- Long Service Life: Vacuum arc-extinguishing technology minimizes wear and tear, reducing maintenance frequency and extending the product’s operational lifespan.
- IEC Standard Compliance: Fully meets the requirements of IEC 62271-100, ensuring global compatibility and adherence to international safety and performance standards.
Technical data
| Circuit-breaker on Column | RVB-24 | RVB-36 | RVB-40.5 | |
| Standard | IEC 62271-100 | √ | √ | √ |
| Rated voltage | (kV) | 24 | 36 | 40.5 |
| Rated insulation voltage | (kV) | 24 | 36 | 40.5 |
| Power frequency withstand | (kV /min) | 70 (dry) / 70 (wet) | 95 (dry) / 95 (wet) | 95 (dry) / 95 (wet) |
| Impulse withstand voltage | (kV peak) | 170 | 170 | 195 |
| Rated frequency | (Hz) | 50-60 | 50-60 | 50-60 |
| Rated normal current | (Amps) | 1250 2000 2500 | 1250 2000 2500 | 2000 2500 |
| Rated symmetrical breaking capacity | (kA r.m.s) | 25 25 31.5 | 25 25 31.5 | 31.5 31.5 |
| Rated short time withstand current (3s) | (kA r.m.s) | 25 25 31.5 | 25 25 31.5 | 31.5 31.5 |
| Asymmetrical breaking capacity | (% of d.c Component at t=45ms) | 35 | 35 | 35 |
| Rated making capacity | (kA peak) | 63 63 80 | 63 63 80 | 80 80 |
| Operating sequence | 0-0.3sec- CO - 3 Min -CO & CO-15sec- CO | √ | √ | √ |
| Opening time | (ms) | 45 ± 10 | 45 ± 10 | 45 ± 10 |
| Capacitor current switching capacity | (Amps) | |||
| Single bank - C2 class | 400 | 400 | ||
| Back to back - C2 class | 750 | |||
| Arcing time | (ms) | 5-15 | 5-15 | 5-15 |
| Total breaking time | (ms) | 50-60 | 50-60 | 50-60 |
| Closing time | (ms) | 75 ± 10 | 75 ± 10 | 75 ± 10 |
| Over all dimensions | On Frame (H x L x P) mm | (3090-3840) x 900 x 686 | ||
| Weight | (kg) | 850/900 | 850/900 | 900 |
| N2 gas absolute pressure | (kPa) for Anticondensation | 150 | 150 | 150 |
| Operating temperature #1 | ℃ | -25…+40 | -25…+40 | -25…+40 |
| Tropicalization | IEC:60068-2-30,721-2-1 | √ | √ | √ |
| Electromagnetic compatibility | IEC 62271-1,61000-6-2,61000-6-4 | √ | √ | √ |
| Solar radiation | (W/m2) | 1000 | 1000 | 1000 |
| Presence of pollution | IEC 60815-Table 1 | Level III | Level III | Level III |
| Creepage distance | (mm/kV) | 25 #2 | 25 #2 | 27.5 #2 |
| Ice coating | (mm) | 10 | ||
| Wind speed | (m/s) | 34 | ||
| Earth quake resistance | (g) | 0.6 | ||
| Surface force on the terminal | Logitudinal xTransversal x Vertical ( N) | 750 x 500 x 750 | ||
Service Environment
Engineered to withstand extreme outdoor conditions, this 36kV vacuum circuit breaker operates reliably under the following parameters:
- Ambient Temperature: -40℃ to +85℃, with a daily average of 25℃
- Altitude: ≤3000m (higher altitudes available via technical customization)
- Wind Speed: Up to 35m/s
- Icing Thickness: Up to 10mm
- Seismic Intensity: ≤8 degrees
- Ambient Air Contamination: ≤ Class III
- Relative Humidity: Daily average ≤95%, monthly average ≤90%
- Saturated Vapor Pressure: Daily average ≤2.2×10⁻³MPa, monthly average ≤1.8×10⁻³MPa
Key Application Scenarios
The 36kV Outdoor High-Voltage Vacuum Circuit Breaker is widely used in global power distribution projects, including:
- Rural and urban 36kV substation power grids
- Pole-mounted distribution line protection
- Industrial and commercial power distribution systems
- Remote power infrastructure in harsh climates
- Power grid modernization and upgrade projects
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