EHV/UHV Gas-Insulated Switchgear (Up to 800kV )

Property Specification

Type: Ultra-High-Voltage (UHV) / Extra-High-Voltage (EHV) Gas-Insulated Switchgear Architecture (up to 800 kV)

Features: Engineered specifically for long-distance power transmission systems up to 800 kV, this system provides compact, optimized, and highly accessible layout configurations tailored for one-and-a-half-breaker and double-breaker busbar schemes. It incorporates high-performance circuit breakers equipped with pre-insertion resistors to ensure dependable switching operations and overvoltage mitigation.

Applications: Long-distance high-capacity power transmission corridors, mega-scale power generation stations, and ultra-high-voltage regional grid tie-in substations.

Description

Key Technical Performance Specifications

Technical Parameter / Specification 800 kV
Rated Maximum Voltage 800 kV
Rated System Grid Frequency 50 / 60 Hz
Power-Frequency Withstand Voltage (1 min) 960 kV
Lightning Impulse Withstand Voltage (1.2/50 μs) 2100 kV
Switching Impulse Withstand Voltage (250/2500 μs) 1550 kV
Nominal Continuous Current (Busbar / Feeder) 6300 / 5000 A
Short-Circuit Interrupting Current Rating 63 kA
Short-Time Thermal Withstand Current (≤ 3 s) 63 kA
Peak Dynamic Withstand Current 171 kA
Physical Bay Module Width 9420 mm
Operating Ambient Temperature Range -40°C to +40°C
Deployment / Environment Indoor / Outdoor