The GW4-72.5kV copper tube type disconnector is an outdoor high-voltage electrical device with an AC frequency of 50Hz. It is an improved product based on the original GW4 series, designed for switching high-voltage lines under no-load conditions and for electrically isolating high-voltage busbars, circuit breakers, and other electrical equipment under maintenance from live high-voltage lines.
The GW4-72.5kV copper tube type disconnector is equipped with the CS11-1 manual operating mechanism, while the GW4-72.5D type is equipped with the CS8-6D manual operating mechanism.
Altitude: Not exceeding 3000 meters.
Ambient temperature: Not higher than -30℃ and not lower than -40℃.
Installation: Only applicable to horizontal installation sites; wind speed not greater than 35m/s.
Seismic intensity: Not exceeding 8 degrees.
Pollution adaptability: The standard type is suitable for Class II polluted areas, and the anti-pollution type is suitable for Class III polluted areas.
Improved bearing turntable structure: The bearing seat is designed to be waterproof, and is equipped with an oil filling hole and adjusting screws, enhancing the overall integrity of the switch and simplifying maintenance.
Enhanced conductive performance:
The connections between the conductive rod and contacts, as well as between the conductive rod and contact finger seat, adopt copper welding technology. Additionally, soft connections are added between contact fingers and contact finger seats, significantly reducing the main circuit resistance compared to screw connections and thereby minimizing contact heating during operation.
The grounding rod is made of high-conductivity aluminum alloy, and the contact parts use red copper components. Soft connections are added at the joint between the conductive rod and the base, as well as between grounding contact finger seats, greatly improving the grounding reliability of the grounding circuit.
Anti-corrosion surface treatment: All exposed main conductive parts undergo red copper silver-plating, resulting in a smooth, aesthetically pleasing surface with strong corrosion resistance and long-lasting durability.
Optimized shaft-hole fit: The original iron-copper fit is replaced with copper-copper or stainless steel-copper fits, solving the problem of rust-induced seizing during long-term outdoor use. Exposed standard parts are made of stainless steel, and metal components undergo hot-dip galvanizing, further enhancing the switch’s corrosion resistance.
Increased safety: A large number of precision castings are used instead of welded parts, reducing safety risks such as weak welding.
Simplified on-site installation: Grounding knives can be swapped left and right on-site, and the coaxial linkage mode is replaced with single-pole linkage, greatly reducing the difficulty of on-site installation.
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