GW5-40.5/1250 High-Current Outdoor Disconnector

GW5-40.5/1250 High-Current Outdoor Disconnector

The GW5-40.5/1250 is a robust 40.5kV, 1250A outdoor disconnector engineered for high-current isolation in demanding medium-voltage networks. It features an advanced anti-flashover design for polluted environments, exceptional mechanical endurance, and compliance with international standards. Its high short-circuit ratings and reliable no-load switching make it ideal for heavy industrial and critical infrastructure applications.

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Product Overview

The GW5-40.5/1250 is a high-performance disconnecting switch specifically designed for 40.5kV systems where high-rated currents (1250A) and reliable isolation are paramount. Serving as a critical point of safety in medium-voltage networks, it provides secure no-load switching and visible isolation for equipment maintenance and system reconfiguration. Built to excel in challenging conditions including industrially polluted, coastal, or seismically active areas its design prioritizes operational security, mechanical resilience, and long-term dependability for mission-critical power distribution.

Product Features

◆ High-Current Design: Optimized for 1250A continuous load with enhanced conductors to reduce losses and heat.

◆ Anti-Pollution Insulation: Specially profiled insulators and long creepage distances (1013-1256mm) prevent flashover in dusty, coastal, or industrial areas.

◆ Robust Mechanical Build: Withstands high static loads (750N/500N/750N) for stability in windy or vibrating installations.

◆ High Fault Withstand: Rated for 31.5kA/4s and 80kA peak current to ensure reliable short-circuit isolation.

◆ Certified Compliance: Meets GB1985 and IEC60129 standards for safety, quality, and global interoperability.

Product Advantages

◆ Superior Performance in Adverse Conditions: Its anti-pollution and high-strength design delivers consistent, safe operation where ordinary switches may fail, minimizing unplanned outages.

◆ Reduced Lifetime Cost: High durability and corrosion-resistant construction lower the total cost of ownership by extending maintenance intervals and service life.

◆ Operational Confidence: The combination of high electrical ratings, mechanical strength, and standard compliance provides assurance for use in safety-critical applications like industrial plants and major infrastructure.

◆ Installation Flexibility: Accommodates various mounting arrangements and is suitable for installation in areas with strict mechanical or environmental challenges.

Usage Scenarios

◇ Heavy Industry: Primary isolation for high-current circuits in steel, chemical, and smelting plants.

◇ Critical Infrastructure: Secure disconnection in 40.5kV substations for transportation hubs, data centers, and major utilities.

◇ Renewable Energy Grid Integration: Reliable isolation for large-scale solar and wind farms, particularly in dusty or coastal areas.

◇ Polluted Environments: Essential for power networks in ports, mining sites, and industrial zones with high airborne contamination.

◇ High-Stress Locations: Suitable for areas prone to strong winds, ice load, or seismic activity.

Technical parameters

Item Unit Parameter
Rated voltage kV 40.5
Rated insulation level 1 min power frequency withstand voltage (RMS) over the ground kV 95
fracture kV 115
Lightning impulse withstand voltage (peak) over the ground kV 185
fracture kV 215
Rated frequency Hz 50
Rated current A 1250
Rated short-time withstand current kA 31.5
Rated peak withstand current kA 80
Rated short-circuit duration Main knife/ground knife S 4/2
Rated terminal mechanical load Horizontal longitudinal load N 750
Horizontal transverse load N 500
Vertical force N 750
creepage distance mm 1013-1256

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