| Brand | ROCKWILL |
| Model NO. | Vacuum Load Break Switch in China Manufacturer-12kV |
| Rated voltage | 12kV |
| Rated frequency | 50/60Hz |
| Series | FZW28F |
The FZW28F-12 Series Outdoor Sectionalizing Vacuum Load Break Switch is a high-performance intelligent switching device engineered for 12kV, 50Hz outdoor three-phase AC power distribution systems. Specialized in making and breaking load currents as well as closing short-circuit currents, it is a core component for protecting and automating urban and rural power grids, and is ideally suited for substations, industrial and mining enterprises, and scenarios requiring frequent switching operations worldwide.
Composed of the FZW28-12 vacuum load break switch and a dedicated controller, the device achieves reliable electrical connection via aviation sockets and outdoor sealed control cables. It features precise detection of mA-level zero-sequence and phase-to-phase currents, enabling accurate identification of internal and external line faults—an essential solution for building efficient, safe, and automated medium-voltage distribution networks. Compliant with IEC 62271-1:2017+A1:2021 and IEC 62271-103:2021 for high-voltage switchgear and controlgear, its robust outdoor design and intelligent fault detection make it a trusted choice for global overseas purchasers.
| Rated Voltage | 12kV |
| Rated Frequency | 50/60Hz |
| Rated Normal Current (In) | 630A |
| Rated Short-Time Withstand Current (Ik) | 20kA / 3s |
| Rated Peak Withstand Current (Ip) | 50kA |
| Rated Short-Circuit Making Current | 50kA |
| Power-Frequency Withstand Voltage (Ud) | 28kV |
| Lightning Impulse Withstand Voltage (Up) | 75kV |
| Mechanical Endurance | 10,000 operations |
| Protection Degree (Enclosure) | IP65 |
| Operational Feature | Maintenance-free under normal working conditions |
| Compliance Standard | IEC 62271-1:2017+A1:2021 / IEC 62271-103:2021 |
| Parameter | Value |
|---|---|
| Ambient Temperature (Normal) | -25°C ~ +40°C |
| Ambient Temperature (24h Average) | ≤35°C |
| Altitude (Normal) | ≤1000m |
| Relative Humidity (Average at +25°C) | ≤90% |
| Solar Radiation | ≤1000 W/m² |
| Wind Pressure | ≤700 Pa (~35 m/s) |
| Ice Coating | ≤10 mm |
| Rain Intensity | ≤3 mm/min |
| Pollution Level | Class III (IEC 60815) |
| Seismic Intensity | ≤8° |
| Installation Orientation | Pole-mounted, vertical (tilt ≤5°) |
Yes. Fully sealed, reinforced housing resists extreme temperatures, humidity, and pollution. Compact, lightweight design for easy pole-mounting.
Yes. Seamlessly integrates with protection systems and supports long-term frequent switching for substations and industrial use.
10 years warranty from the date of commissioning, covering manufacturing defects and performance degradation under normal operating conditions.
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