RMU & Gas-Insulated Switchgear
Project-configured 12kV, 24kV and 33/35/36/40.5kV solutions for utility distribution, EPC substations, industrial power, solar plants, BESS and infrastructure.
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QCL-12 Series
Gas-insulated RMU for 10kV, 11kV and 12kV distribution systems. C, F, V, PT and metering arrangements are configured against the approved SLD.
View QCL-12 Details β
QCL-24 Series
Gas-insulated switchgear for 20kV, 22kV and 24kV networks, with project-specific protection, metering, cable interfaces and secondary control.
View QCL-24 Details β
QCL-40.5 Series
Gas-insulated switchgear for 33kV, 35kV, 36kV and 40.5kV project applications. Final ratings and panel arrangement follow the approved specification.
View QCL-40.5 Details βVoltage & Application Guide
| Network Voltage | Recommended Series | Typical Use |
|---|---|---|
| 10 / 11 / 12kV | QCL-12 | Ring distribution, transformer feeders, compact substations and industrial distribution |
| 20 / 22 / 24kV | QCL-24 | Utility networks, renewable-energy projects and EPC substations |
| 33 / 35 / 36 / 40.5kV | QCL-40.5 | Primary distribution, industrial plants, solar/BESS and infrastructure projects |
Final product selection is based on rated current, fault level, functional units, protection scheme, cable interface, site conditions and applicable standards.
Functional Units & Project Configuration
Cable Switch Unit
Ring incoming and outgoing feeder functions.
Fuse / Breaker Protection
Transformer and feeder protection configured to the project.
PT, Metering & Control
Voltage measurement, metering, relay, indication and communication options.
Information Required for Selection
Electrical Data
System voltage, frequency, rated current and short-circuit level.
Project Documents
SLD, specification, quantity, functional units and protection requirements.
Site Conditions
Indoor/outdoor installation, altitude, ambient temperature, cable entry and room limitations.
RMU & GIS Frequently Asked Questions
How do I select the correct ring main unit?
Start with system voltage, rated current, short-circuit level, functional units, protection philosophy, cable interface and installation conditions. Send the SLD and specification for project-specific confirmation.
What is the difference between 11kV and 12kV switchgear?
11kV normally describes the operating system voltage, while 12kV is a common equipment rated-voltage class. Final selection must follow the project standard and insulation requirements.
Can 20kV projects use 24kV RMU equipment?
24kV-class equipment is commonly evaluated for 20/22kV systems, subject to the applicable standard, insulation level, utility requirements and complete project specification.
What is the difference between gas-insulated and air-insulated RMU?
Gas-insulated designs prioritize compactness and environmental separation; air-insulated designs provide a different maintenance and construction approach. The preferred solution depends on space, service conditions, operating practice and project requirements.
What do C, V and F functional units mean?
C generally refers to a cable switch function, V to a vacuum circuit-breaker protection function, and F to switch-fuse protection. The actual panel combination is confirmed from the SLD.
What information is required for an RMU quotation?
Please provide system voltage, frequency, rated current, short-circuit level, quantity, SLD, protection requirements, cable entry, site conditions and required drawings or test documents.
Can Qiangchi provide SLD and GA drawing support?
Yes. Engineering review can cover functional-unit arrangement, single-line diagram clarification, general arrangement and document preparation according to the confirmed project scope.
How is FAT arranged for MV switchgear?
The inspection and test scope is agreed against the order, approved drawings and applicable project requirements. FAT documentation and witnessing arrangements are confirmed before production completion.
Choose RMU & GIS by System Voltage
Enter through the voltage level used in your specification, then compare the suitable Qiangchi product family, current range and project documents.
11kV RMU
Selection entry for 11kV utility, commercial and industrial distribution networks.
Explore 11kV RMU β12kV RMU
QCL-12 and related 12kV ring-main configurations for cable distribution projects.
Explore 12kV RMU β24kV RMU
QCL-24 selection support for 20/22/24kV networks, EPC packages and renewable projects.
Explore 24kV RMU β35kV GIS
QCL-40.5 platform entry for 33/35/36kV insulated switchgear applications.
Explore 35kV GIS β40.5kV GIS
QCL-40.5 available at 630, 1250, 2500 and 3150A, subject to confirmed configuration.
Explore 40.5kV GIS βProduct Selector
Compare voltage, insulation, functional units and application before sending an RFQ.
Open Product Selector βSend Your SLD for Engineering Review
We will review the voltage level, functional units, protection, dimensions and document scope before quotation.
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