Description
Description of FZW28-12 Series Outdoor Boundary Vacuum Load Switch
The FZW28-12 Series Outdoor Boundary Vacuum Load Switch is a high-reliability outdoor electrical equipment specifically developed for three-phase AC power distribution systems with a rated voltage of 12kV and a rated frequency of 50Hz. It is mainly used to switch on and off load currents and switch on short-circuit currents, serving as a key component in outdoor power distribution networks that require stable performance and precise control.
Composed of two core parts—the FZW28-12 vacuum load switch and a dedicated controller—this series realizesa stable electrical connection through aviation sockets and outdoor sealed control cables. Its advanced detection capability enables reliable identification and monitoring of milliamperage zero-sequence currents and phase-to-phase open-circuit currents inside and outside the boundary, making it adaptable to power distribution systems with different neutral point grounding methods.
With a compact structure, excellent weather resistance, and sealing performance, the FZW28-12 series is designed to adapt to complex outdoor environments, providing stable and safe protection for power distribution systems and laying a solid foundation for the automation and intelligence of urban and rural power grids.
Parameter of FZW28-12 Series Outdoor Boundary Vacuum Load Switch
| number | project | unit | Data value | ||
| 1 | rated voltage | kV | 12 | ||
| 2 | rated insulation level | 1-minute power frequency withstand voltage (inter-pole to ground/inter-pole to open) | kV | Dry | 42/48 |
| lightning impulse withstand voltage (inter-pole to ground/rupture) | wet | 34 | |||
| 3 | rated frequency | Hz | 50 | ||
| 4 | rated current | A | 63 | ||
| 5 | rated time delay, current, and duration | kA/4s | 16 | 20 | |
| 6 | rated peak current rating | kA | 40 | 50 | |
| 7 | rated short-circuit closing current | kA | 40 | 50 | |
| 8 | mechanical life | time | 10000 | ||
| 9 | net weight | kg | 198 | ||
Feature of FZW28-12 Series Outdoor Boundary Vacuum Load Switch
- Reliable Boundary Detection: It can accurately identify and monitor zero-sequence currents (milliamperage level) and phase-to-phase open-circuit currents inside and outside the boundary, effectively distinguishing fault ranges and providing strong support for power grid fault handling.
- Stable Structural Composition: The combination of a vacuum load switch and a dedicated controller, plus an aviation socket and sealed control cable connection, ensures good sealing and anti-interference performance, adapting to long-term outdoor operation.
- Strong Environmental Adaptability: Adopting corrosion-resistant, waterproof, and anti-condensation design, it can work stably in high temperature, low temperature, high humidity, and polluted outdoor environments, with a low failure rate.
- Suitable for Frequent Operation: The optimized operating mechanism has high mechanical durability, can withstand long-term frequent switching, and meets the use needs of occasions requiring frequent operation.
- Wide Compatibility: It is applicable to power distribution systems with different neutral point grounding methods, with strong versatility and suitable for various outdoor power distribution scenarios.
- Easy Installation & Maintenance: The compact and lightweight design facilitates on-site installation and transportation; the mature structural design reduces later maintenance work, saving time and labor costs for users.
