EHV Compact GIS (Up to 550kV )

Property Specification

Type: Extra-High-Voltage Compact Gas-Insulated Switchgear / GIS Platform (up to 550 kV)

Features: Engineered to provide high-capacity electrical performance within an optimized, space-saving footprint, this switchgear system supports service ratings up to 550 kV, continuous load currents up to 6300 A, and short-circuit fault interruption currents up to 80 kA. Widely deployed across global 420 kV and 550 kV transmission networks,

Applications: Extra-high-voltage grid transmission, grid interconnection for mega-scale renewable power projects, heavy industrial power infrastructure, and major hydroelectric generating stations.

Description

Key Technical Performance Specifications

Technical Parameter / Specification 420 kV 550 kV
Rated Maximum Voltage 420 kV 550 kV
Rated System Grid Frequency 50 / 60 Hz 50 / 60 Hz
Power-Frequency Withstand Voltage (1 min) 650 kV 740 kV
Lightning Impulse Withstand Voltage (1.2/50 μs) 1425 kV 1675 kV
Switching Impulse Withstand Voltage (250/2500 μs) 1050 kV 1300 kV
Nominal Continuous Current (Busbar / Feeder) 5000 A 6300 / 5000 A
Short-Circuit Interrupting Current Rating 63 kA 63 / 80 kA
Short-Time Thermal Withstand Current (≤ 3s) 63 kA 63 / 80 kA
Peak Dynamic Withstand Current 170 kA 171 / 216 kA
Physical Bay Module Width 2160 / 2700 mm 3120 mm
Operating Ambient Temperature Range -30°C to +55°C -30°C to +55°C
Deployment / Environment Indoor / Outdoor Indoor / Outdoor