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220kV High Voltage Disconnector – Reliable China Suppliers and Factory for Power Transmission Solutions
Disconnector
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 Conditions for Use
Environmental temperature: -40 ° C ~ +40 ° C
Altitude: not exceeding 2000m
Wind speed: not exceeding 34m/s
Ice thickness: not exceeding 10mm
Earthquake intensity: not exceeding 8 degrees
Air pollution level: Level III or IV or below
Sunshine radiation: 1000W/m² (sunny noon)
Technical Performance & Design Features
Reliable Conductive Circuit
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.
High-Strength Aluminum Alloy Conductive Arm
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.
Self-Operated Contact Finger Design
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.
Maintenance-Free Rotating Part
The rotating part of the isolation switch is designed to be maintenance free. The rotating seat is designed as a sealed structure. Water vapor, dust, and harmful gases cannot enter, preventing 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 (FAQ)
What is the primary function of the GW4 series outdoor disconnector?
It is outdoor high-voltage transmission equipment used to disconnect or connect high-voltage lines without load. It allows for replacing high-voltage lines, changing operation modes, and implementing safe electrical isolation for high-voltage equipment like busbars and circuit breakers during maintenance.
What type of structure and operating mechanisms does this product use?
This product features a double column horizontal fracture center opening structure. It can be equipped with grounding switches on either or both sides. The isolation switch uses CS14G or CS11 manual mechanisms or a CJ2 motor mechanism, while the grounding switch uses CS14G, CS17G, or CS17D manual mechanisms for three-pole linkage operation.
What are the environmental limits for installing the disconnector?
It is designed to operate in temperatures from -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 levels of Class III, IV, or below.
How does the design of the contact finger prevent overheating and wear?
It uses a self-operated contact finger made of a special copper alloy that relies on its own elastic force to clamp the contact, eliminating the need for traditional springs. This design prevents spring corrosion and annealing, reduces contact resistance, minimizes friction stroke during operation, and lowers the required operating force.
Why is the rotating part of the isolation switch considered maintenance-free?
The rotating seat is fully sealed to prevent water vapor, dust, and harmful gases from entering, which protects the internal molybdenum disulfide lithium-based grease. Equipped with internal thrust and radial ball bearings, it handles gravity and horizontal forces effectively, ensuring the operating torque does not increase over long-term use.
HEADING-TYPE-1
High voltage parallel capacitors are suitable for parallel connection in AC power systems with power frequency (50Hz or 60Hz) of 1kV and above. They are used to compensate for inductive reactive power, improve power factor, improve voltage quality, reduce line losses, and fully utilize the efficiency of power generation and supply equipment.
description2
HEADING-TYPE-1
High voltage parallel capacitors are suitable for parallel connection in AC power systems with power frequency (50Hz or 60Hz) of 1kV and above. They are used to compensate for inductive reactive power, improve power factor, improve voltage quality, reduce line losses, and fully utilize the efficiency of power generation and supply equipment.
description2