RMU & Gas Insulated Switchgear

Qiangchi Electric

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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Product Series

QCL-12 12kV ring main unit switchgear lineup for utility and EPC projects

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.

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QCL-24 24kV gas insulated switchgear

QCL-24 Series

Gas-insulated switchgear for 20kV, 22kV and 24kV networks, with project-specific protection, metering, cable interfaces and secondary control.

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QCL-40.5 gas insulated switchgear

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 β†’

Voltage & Application Guide

Network VoltageRecommended SeriesTypical Use
10 / 11 / 12kVQCL-12Ring distribution, transformer feeders, compact substations and industrial distribution
20 / 22 / 24kVQCL-24Utility networks, renewable-energy projects and EPC substations
33 / 35 / 36 / 40.5kVQCL-40.5Primary 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.

VOLTAGE SELECTION

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.

Send Your SLD for Engineering Review

We will review the voltage level, functional units, protection, dimensions and document scope before quotation.

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