Higher-voltage project distribution
40.5 kV gas-insulated switchgear
A gas-insulated switchgear platform for utility substations, industrial power and EPC supply. Define the feeder arrangement, insulation level and equipment scope from your single-line diagram.
No drawing yet? Start with your country, application and a short description.
QCL-40.5 / Product overview
Coordinate higher-voltage feeders as one line-up
Review network conditions, switching duties and secondary systems together before selecting the arrangement.
Network requirements
Confirm system voltage, earthing, insulation coordination and the applicable utility or project specification.
Feeder and busbar duties
Specify busbar and feeder current separately, together with fault level, switching duties and the required protection scheme.
Project interfaces
Coordinate cable terminations, CT/VT requirements, auxiliary supply, relay functions and communication interfaces.
Technical reference
Key specifications and their application
Use the reference values below to start selection. The confirmed unit, drawings and technical agreement define the supplied equipment.
On a small screen, scroll the table horizontally to see the scope of each value.
| Item | Reference | How to apply it |
|---|---|---|
| Rated voltage | 40.5 kV | Equipment class; network insulation level must be checked |
| Rated frequency | 50 Hz | Published catalogue reference |
| Project current options | 630 / 1250 / 2500 / 3150 A | Separate project-specific configurations |
| Published catalogue current range | 630–1250 A | The linked V3 catalogue covers this range only |
| Power-frequency withstand | 95 kV, 1 min | Catalogue value; confirm selected configuration |
| Lightning impulse withstand | 185 kV | Catalogue value; confirm selected configuration |
| Short-circuit duty | 25 / 31.5 kA options in catalogue | Confirm breaking duty, short-time current and duration separately |
| Functional arrangement | C / F / V / D / De | Unit selection and dimensions follow the approved SLD |
Configuration & interfaces
Select the function before fixing the cabinet arrangement
The catalogue presents switching, protection and direct-connection functions. Confirm the chosen unit against the duty it must perform.
Load switching
Cable and ring-network switching. Define earthing, operation and cable connection requirements.
Switch-fuse protection
Transformer-feeder protection. Coordinate the fuse, transformer and project protection requirements.
Circuit-breaker protection
Vacuum circuit-breaker function with project-selected protection, instrument transformers and controls.
Technical documents
Find the document for your next decision
Use product information for initial selection, then confirm project drawings and the evidence for the exact equipment you specify.
Engineering documents
QCL-40.5 catalogue
Product information for the documented 630–1250 A range. Higher-current requirements need their own configuration review.
Open catalogue PDFEngineering documents
GA & single-line diagram
Confirm cabinet arrangement, dimensions, cable interfaces and operating clearances.
Explore drawing supportEngineering documents
Model-specific test scope
SL2025/0696-01 identifies QCL-40.5/1250-31.5; its listed category is insulation performance. Request the full report to review the tests performed.
Review report informationWorking with Qiangchi
A clear path from requirements to agreed supply
For EPCs, panel builders, contractors and local partners, start with the equipment schedule and the responsibilities for the project.
Share the SLD / BOQ
Send your equipment requirements, destination and available specification.
Review the configuration
Clarify equipment scope, interfaces and applicable technical documents.
Receive the proposal
Review the project-specific technical proposal and quotation.
Agree the supply
Confirm the drawings, equipment, inspection documents and commercial scope.
The local partner handles local engineering and market-access requirements. Qiangchi supplies the equipment and documentation agreed for the order.
Selection questions
QCL-40.5 questions
Which system voltages can be evaluated?
33kV, 35kV, 36kV and 40.5kV project applications are evaluated against the network insulation level, earthing system and project specification.
What rated current is available?
630A, 1250A, 2500A and 3150A are project-specific options. Feeder and busbar ratings follow the load calculation, SLD and selected configuration.
Does one type-test report cover every current rating?
Report SL2025/0696-01 identifies model QCL-40.5/1250-31.5 and is listed under insulation performance. The full report defines which tests were performed. Model ratings alone do not establish current or short-circuit test coverage, and other configurations require their applicable evidence.
How are dimensions and cable interfaces confirmed?
Panel arrangement, cable type and terminations, protection and auxiliary requirements determine the final GA drawing and interface details.
What is needed to start an enquiry?
Share your country, system voltage and equipment requirement. We can then clarify current, fault level, quantity, protection, drawings and delivery requirements for a detailed offer.
Can FAT and technical submittals be arranged?
Routine tests, FAT scope, witness points and required documents can be agreed in the project document schedule.
Prepare your enquiry
Bring the details you already have
You do not need a complete tender package to start. These details help move the enquiry towards a configuration and quotation.
- Country, application and system voltage
- SLD / BOQ and feeder functions
- Busbar / feeder current and fault duty
- Protection, CT/VT and auxiliary supply
- Cable details, site conditions and footprint
- Quantity, document requirements and schedule
Discuss your QCL-40.5 requirement
Turn the project requirements into an equipment scope.
Share your application, drawings or specification. We can help clarify the configuration and documents needed for a project-specific offer.
Prefer email? sales@zgqci.com