FZW32-24/1250A Outdoor High-Voltage Load Switch; 12KV Outdoor Pole-Mounted High-Voltage Isolation Load Switch

The FZW32 outdoor high-voltage isolating vacuum load switch is an outdoor high-voltage equipment applied to three-phase AC 50Hz power distribution networks with a rated voltage of 12kV or 40.5kV. It is mainly used to break load current, transformer no-load current, cable charging current and close load current, and has the functions of breaking, isolating, connecting and switching. This product can be matched with a fuse as a transformer protection component, and is suitable for the transformation of power distribution systems such as rural power grids, urban power grids, and railways.

This switch adopts a structure in which the vacuum arc extinguishing chamber and the isolating knife are linked. When the brake is opened, an obvious isolating gap can be formed, and it has the characteristics of no explosion hazard and maintenance-free. Its features include small size, light weight, beautiful appearance and simple operation. The body parts are made of stainless steel, and the base frame is made of stainless steel or hot-dip galvanized anti-ultraviolet carbon steel structure, supporting single-pole or double-pole installation, as well as manual, electric and remote operation modes.

Main technical parameters and environmental conditions

Rated current: 630A for the FZW32-12 type, and 1250A for the FZW32-40.5 type.

Rated short-circuit making current: up to 63kA.

Mechanical life: up to 10000 times.

Applicable altitude: generally no more than 2000 meters (some models can reach 3000 meters or higher).

Working temperature: -30℃ to +40℃.

Environmental humidity: the daily average is no more than 95%, and the monthly average is no more than 90%.

Pollution level: Grade Ⅳ.

Seismic intensity: no more than 8 degrees.

Functions and features

Arc extinguishing and isolation: Adopts vacuum arc extinguishing technology, with strong arc extinguishing ability and no pollution. The isolating knife is linked with the vacuum arc extinguishing chamber, which provides an obvious visible gap after the brake is opened, and also has the function of an isolating switch.

Safe and reliable: No explosion hazard, long electrical life and can be operated frequently.

Durable structure: Made of stainless steel parts and weather-resistant materials, suitable for outdoor environments.

Wide application: Suitable for places requiring frequent operations, and can be used in power transmission and distribution systems of departments such as electric power, metallurgy, mining, and chemical industries. 3 When equipped with an electric mechanism and a controller, it can be used as a line breaking switch or an automatic breaker.

Typical model: FZW32-12

The rated voltage of the FZW32-12 outdoor high-voltage isolating vacuum load switch is 12kV, and the rated current is 630A. Its insulation withstand parameters are: 1min power frequency withstand voltage (vacuum gap / isolating gap) 42/48kV, lightning impulse withstand voltage (phase to phase and phase to ground / isolating gap) 75/85kV. The rated short-time withstand current (thermal stability) is 20kA, and the rated short-circuit duration is 4s.

This product adopts a three-phase pillar structure, and the three-phase linkage operation of the isolating knife helps to ensure the breaking synchronization. The insulating part is made of silicone rubber bushing, which has the characteristics of high and low temperature resistance and aging resistance. As a new generation of high-voltage electrical products, it complies with GB3804 and IEC standards, and has passed the appraisal of relevant new products.