GW4-40.5, 72.5, 126, 145D (W) type isolation relationship three-phase AC frequency 50Hz outdoor high-voltage transmission equipment is used to disconnect or connect high-voltage lines without load, in order to replace high-voltage lines, change operation mode, and implement safe electrical isolation for high-voltage electrical equipment such as busbars and circuit breakers for maintenance.
This product is a double column horizontal fracture center opening type, which can be equipped with grounding switches on either side or both sides. The isolation switch adopts CS14G or CS11 manual operation mechanism or CJ2 motor operation mechanism for three-pole linkage operation; The grounding switch adopts CS14G, CS17G or CS17D manual operating mechanisms for three-pole linkage operation.
Environmental temperature: -40 ° C ~ +40 ° C
Altitude: not exceeding 2000m
Wind speed: not exceeding 34m/s
Ice thickness: not exceeding 10mm
Earthquake intensity: ≤ 8 degrees
Air pollution: Level III or IV or below
Sunshine radiation: 1000W/m²
The entire conductive circuit, except for the sliding contact at the fracture, has fixed connections between other conductors such as the outlet end, contact head, and between the contact finger and conductive arm, with low contact resistance and reliable operation.
The conductive arm is made of rectangular aluminum alloy tubes, which have high strength, light weight, large heat dissipation area, and good anti-corrosion performance.
Made of special copper alloy to create a self operated contact finger. By relying on the elastic force of the contact finger itself to clamp the contact, the contact finger spring has been eliminated, eliminating the vicious cycle of reduced contact clamping force, increased contact resistance, and intensified contact heating caused by spring corrosion, shunt heating, and annealing. The contact is bent from copper plate and has a large connection area with the conductive arm. During the opening and closing process, the friction stroke between the contact and the finger is short, and the operating force is small.
The rotating part of the isolation switch is designed to be maintenance free. The rotating seat is designed as a sealed structure, preventing water vapor, dust, and harmful gases from entering. This prevents the loss and solidification of molybdenum disulfide lithium-based lubricating grease inside the bearing. The bearing seat is equipped with thrust ball bearings and radial ball bearings inside, which bear the gravity and horizontal force of the isolation switch through these two special bearings, so that the operating torque of the isolation switch will not increase after long-term operation.
Frequently Asked Questions
What is the primary function of the GW4 outdoor disconnector?
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It is used to disconnect or connect high-voltage lines without load. This allows for replacing high-voltage lines, changing operation modes, and implementing safe electrical isolation for high-voltage equipment such as busbars and circuit breakers during maintenance.
What operating mechanisms are compatible with this isolation switch?
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The isolation switch can be operated using CS14G or CS11 manual mechanisms, or a CJ2 motor operation mechanism for three-pole linkage. The grounding switch uses CS14G, CS17G, or CS17D manual mechanisms.
What material is used for the conductive arm and what are its advantages?
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The conductive arm is made of rectangular aluminum alloy tubes. This material provides high strength, light weight, a large heat dissipation area, and excellent anti-corrosion performance.
How does the self-operated contact finger design prevent contact heating?
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It is made from a special copper alloy that relies on its own elastic force to clamp the contact, eliminating the need for traditional springs. This avoids issues like spring corrosion, shunt heating, and annealing, which typically lead to reduced clamping force and increased contact resistance.
Why is the rotating part of the disconnector maintenance-free?
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The rotating seat has a sealed structure that prevents water vapor, dust, and harmful gases from entering. This design stops the internal molybdenum disulfide lithium-based lubricating grease from leaking or solidifying, ensuring stable operating torque over long-term use.
What are the limit environmental conditions for this high-voltage equipment?
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The equipment is designed to operate within temperatures of -40°C to +40°C, altitudes up to 2000m, wind speeds up to 34m/s, ice thickness up to 10mm, earthquake intensities up to 8 degrees, and air pollution environments at or below Level III or IV.
