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GW7B Three-Column Horizontal Double Break Disconnector
GW7B product is a three-column horizontal rotary type outdoor high-voltage disconnector. Available in two structural configurations: direct-drive closing type and rotary contact type. Rated voltage covers 40.5-800kV.
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Conductive Transmission Advantages
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Conductor Advantages
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Structural Engineering Advantage
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Electromechanical Separation Design
Product Highlights
Conductive Transmission Advantages
Main conductive arms and static contact seats employ aluminum alloy profiles (high conductivity, high strength) with anodized surface treatment. Combines corrosion resistance, high mechanical strength, and excellent heat dissipation. Supports maximum rated current of 5000A with short-time withstand current up to 63kA.
Conductor Advantages
Ensures reliable contact between moving contacts and contact fingers with low operating force. Eliminates impact forces on supporting insulators at both ends. Main contacts feature self-cleaning capability. Contact finger springs made of stainless steel with insulating spacers prevent corrosion and current diversion.
Structural Engineering Advantage
Integral welded base frame enables flexible adjustment of insulator mounting height. Fully sealed bearing housing prevents lubricant loss/solidification, eliminating oil replenishment maintenance. Internal combined-support bearing design ensures gravity torque and horizontal component force are respectively borne by two specialized bearings.
Electromechanical Separation Design
Adopts integral lightweight design for simplified structure and easier operation. Enhances efficiency in usage and maintenance. Rotating components designed per maintenance-free requirements.
Technical Specification
Rated Voltage
40.5kV, 72.5kV, 145kV, 170kV, 252kV 300kV, 363kV, 420kV, 550kV, 800kV
Rated Frequency
50/60Hz
Rated Current
Up to 5000A
Rated Short-Time Withstand Current
Up to 63kA
Rated Peak Withstand Current
Up to 164kA
Ambient Temperature
-50℃~ +55℃
Ice Coating
Up to 20mm
Seismic Intensity
Up to 1.0g
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