GW4-40.5/630 40.5kV Outdoor Disconnector

GW4-40.5/630 40.5kV Outdoor Disconnector

The GW4-40.5/630 is a 40.5kV, 630A outdoor disconnecting switch designed for reliable electrical isolation and switching in high-voltage systems. Featuring silver-plated contacts, robust arc-extinguishing capabilities, and an IP54-rated enclosure, it ensures stable performance in harsh environments ranging from -40°C to +40°C, making it suitable for demanding industrial and utility applications.

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Product Overview

The GW4-40.5/630 Outdoor High Voltage Disconnecting Switch is engineered for safe and reliable electrical isolation in 40.5kV distribution and transmission networks. With a rated current of 630A, it supports essential switching and isolation functions under normal and fault conditions. Constructed with durable materials and advanced design features, this switch is built to perform consistently in extreme environmental and operational scenarios, ensuring long-term system integrity and safety.

Product Features

◆High-Performance Contacts: Silver-plated copper contacts ensure superior conductivity and corrosion resistance, with a peak current withstand capacity of 100kA.

◆Advanced Arc Extinguishing: Equipped with efficient arc-quenching devices to quickly interrupt current and prevent system damage.

◆Robust Enclosure: Stainless steel housing with double-layer sealing provides IP54 protection against dust and water ingress.

◆Wide Operating Range: Suitable for temperatures from -40°C to +40°C and compliant with an 8-degree seismic rating for earthquake-prone areas.

◆High Insulation: Rated insulation includes a power-frequency withstand voltage of 95kV (ground) and 115kV (break), with lightning impulse withstand voltages of 185kV (ground) and 215kV (break).

Product Advantages

◆Enhanced Safety: Reliable arc extinguishing and high insulation levels minimize operational risks in high-voltage applications.

◆Durability in Harsh Conditions: IP54 enclosure and wide temperature tolerance ensure consistent performance under challenging environmental conditions.

◆Low Maintenance: Silver-plated contacts and corrosion-resistant materials reduce wear and extend service life.

◆Versatile Compatibility: Designed to integrate seamlessly into existing 40.5kV systems for substations, industrial networks, and renewable energy plants.

Usage Scenarios

◇High-Voltage Substations: Used for isolating transformers, busbars, and feeders in 40.5kV outdoor substations.

◇Industrial Power Systems: Ideal for heavy industries such as mining, steel, and chemical plants requiring reliable high-voltage switching.

◇Renewable Energy Integration: Suitable for wind and solar farms where disconnection and isolation are needed for maintenance or fault management.

◇Infrastructure Networks: Applied in railway electrification, airport power supply, and other critical infrastructure requiring robust disconnecting solutions.

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 630
Rated short-time withstand current kA 20 20 31.5
Rated peak withstand current kA 40 50 63
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 1025-1250

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