GCS Low Voltage Switchgear RFQ Checklist

Prepared by: JCON ELECUpdated: 2026-10-16

Short answer

A useful GCS RFQ needs the SLD and a feeder schedule, not just a cabinet count. Define incomers, bus ties, outgoing and motor circuits, drawer arrangements, busbar duty, brands and installation conditions. Compare the complete assembly and document scope before comparing prices.

Representative GCS low-voltage switchgear with withdrawable units

Separate panel functions and functional units

Identify main incoming sections, bus couplers, distribution feeders, MCC circuits and compensation as separate items. Drawer quantity and size should follow the circuit configuration and approved cabinet arrangement.

List every feeder's load, quantity, protection and control requirements.
Distinguish fixed sections, withdrawable units, spare ways and reserved space.
Confirm whether power-quality monitoring, remote communications and software are included.

Information to confirm

System ratingsVoltage/frequency, earthing, main busbar current, neutral/PE arrangement and short-circuit rating basis and duration.

Circuit scheduleIncomers, bus ties, feeder quantities, motor loads, starter/VFD functions and compensation requirements.

Drawer arrangementFunctional-unit sizes, fixed/withdrawable choice, spare units, interlocks and maintenance access.

ComponentsBreaker, contactor, protection, meter, PLC/VFD and capacitor brands where applicable.

InstallationRoom and lineup dimensions, cable entry, enclosure rating, ambient conditions, ventilation and future extension.

Verification and documentsApplicable standard/edition, assembly verification evidence, routine records, GA, schematics and BOM.

Related equipment

GCS Low Voltage Switchgear

Withdrawable LV distribution and motor-control sections with project-specific feeders.

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Low Voltage Switchgear

Main distribution, outgoing feeders and auxiliary power configured to the SLD.

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Control Cabinets

PLC, motor starting, VFD and auxiliary control configurations for process loads.

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Compare quotations on the same basis

Same feeder listCompare identical incoming, outgoing, motor and spare circuits; separate optional feeders.

Same dutyCheck busbar current, short-circuit duty, protective-device basis and the offered enclosure together.

Same brands and servicesDistinguish mandatory brands, approved alternatives, settings, communications and commissioning scope.

Same assembly evidenceA component certificate alone does not verify the whole assembly. Check which configuration and ratings the submitted documents cover.

Frequently asked questions

Can GCS be quoted from the number of cabinets alone?Only as an indicative budget with assumptions. A firm proposal needs the circuit list, electrical duty, drawer configuration, brands and installation requirements.

Are drawers interchangeable between all GCS suppliers?Do not assume that. Dimensions, contacts, interlocks and wiring arrangements must be confirmed for the specific manufacturer and design.

Is an IEC 61439 reference a product certificate?No. Confirm the applicable assembly requirements and the actual verification documents for the offered design. A standard reference is not evidence of certification by itself.

Sources and scope

This is a JCON ELEC procurement checklist, not a universal GCS rating table. IEC 61439-2 describes power switchgear and controlgear assembly requirements; the actual design and verification scope require project review.

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Send your drawings and requirements

Share the available SLD, equipment list, project requirements and destination. Mark unresolved points so assumptions can be listed in the proposal.

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