Product Overview

The DQC-40.5 represents a new generation of digital, gas-insulated switchgear (C-GIS). Its fully enclosed system, with all primary equipment sealed in stainless steel enclosures, ensures high reliability, personnel safety, and a maintenance-free lifecycle.

● This switchgear integrates intelligent components to sense and analyze critical parameters (temperature, mechanical characteristics). Digital capabilities enable automated data collection and informed decision-making, cutting costs. Upgraded interlocking, arc resistance, and seismic performance ensure simpler, safer operation.

Core Advantages & Features

End-to-End Digital SolutionsBased on an IoT architecture, these solutions integrate digital products for complete applications in digital substations and smart power consumption scenarios.

01
Real-Time Power MonitoringProvides continuous monitoring and control of power sources, equipment, and loads to ensure system safety.

02
Digital Maintenance SystemOffers digital equipment labels, fault diagnostics, predictive maintenance, and expert remote guidance to enhance operational efficiency.

03
Energy Management IntegrationPerforms multi-energy monitoring and coordination to support energy savings, carbon reduction, and low-carbon objectives.

04

Technical Specifications

Basic Parameters
Rated Voltage	40.5 kV
Rated Frequency	50 Hz
Rated Current	630 A / 1250 A / 1600 A / 2000 A / 2500 A / 3150 A
Rated Power Frequency Withstand Voltage	98/120 kV (isolation gap)
Rated Lightning Impulse Withstand Voltage	186/220 kV (isolation gap)
Mechanical Life	1000 times
Rated Short-circuit Breaking Current	25/31.5/40 kA
Main Circuit Rated Short-time Withstand Current (4s)	25/31.5/40 kA
Main Circuit Rated Peak Withstand Current	63/80/100 kA
Internal Arc Classification	AFLR, 25 kA / 31.5 kA / 40 kA, 1s
Rated Working Pressure (20℃ gauge)	0.03 Mpa
Minimum Working Pressure (20℃ gauge)	0.02 Mpa
Enclosure Protection Class	IP42
Gas Compartment Protection Class	IP67
Annual Gas Leakage Rate	≤0.01%