Compact high-voltage distribution equipment for substations, utility networks, renewable-energy collection systems, industrial plants and EPC project packages.
Product Overview
QCL-40.5 series gas-insulated switchgear is developed for switching, protection, control and distribution in 33โ40.5kV-class systems. The compact enclosed primary system supports projects requiring higher ratings, reduced footprint and coordinated engineering deliverables.
Core Advantages
Compact High-Voltage Design
Optimized footprint for substations and renewable-energy collection systems.
Up to 3150 A
630 / 1250 / 2500 / 3150 A ratings support different feeder and busbar duties.
Project Engineering
SLD, protection, control, interlocking, cable and communication interfaces are coordinated before production.
Reliable Operation
Enclosed primary circuit and controlled assembly support stable service.
FAT & Documentation
Project-specific inspection, testing and controlled technical documents.
Export Delivery Support
Packing, shipment documents and technical handover organized for overseas projects.
Technical Parameters
| Item | QCL-40.5 Series |
|---|---|
| Rated voltage | 40.5 kV |
| Rated frequency | 50 Hz |
| Rated current | 630 / 1250 / 2500 / 3150 A (project-specific configuration) |
| Rated short-circuit breaking current | 20/25/31.5 kA |
| Rated peak withstand current | 80 kA |
| Power-frequency withstand voltage | 95 / 118 kV |
| Lightning impulse withstand voltage | 185 / 215 kV |
| Enclosure protection | IP4X |
| Final configuration | According to approved SLD, application and technical specification |
Functional Units & Configuration
| Configuration Area | Project Options |
|---|---|
| Incoming / outgoing feeder | Circuit-breaker and project-defined switching arrangements |
| Busbar and sectionalizing | Main bus, bus section and bus coupling schemes |
| Protection and control | Relay, metering, indication, communication and control power |
| Measurement | CT, VT/PT and metering configurations |
| Cable interface | Selected to cable type, size, quantity and termination requirements |
Applications
Product Details
Front & Control Interface
Operating, protection, indication and communication functions arranged for project operation.
Primary Enclosure
Busbar and switching components integrated within the enclosed primary system.
Cable Compartment
Cable termination and earthing interfaces coordinated with site connection requirements.
GA Drawing & Dimensions
Complete cabinet arrangement and GA dimensions are released after technical configuration review. Drawings are supplied in full for project approval.
Send Your SLD for GA Drawing โTypical SLD
Incoming, outgoing, bus-section, bus-coupler, transformer-feeder and measurement arrangements are developed against the project SLD.
Manufacturing & Quality
Project, FAT & Shipment Evidence
Evidence is documented by project region, voltage, equipment, configuration, inspection, packing and shipment while protecting confidential customer information.
View Project Delivery Support โDownloads
QCL-40.5 Product Catalogue
Public product-family catalogue covering 630 / 1250 / 2500 / 3150 A configurations and 20/25/31.5 kA breaking levels.
Project Documents
GA drawings, SLD and test-document scope are supplied against the confirmed configuration.
FAQ
Which system voltages can be evaluated?
33kV, 35kV, 36kV and 40.5kV project applications are evaluated against the network insulation level and project specification.
What rated current is available?
QCL-40.5 project configurations are available at 630A, 1250A, 2500A and 3150A. The final feeder and busbar rating is confirmed against the SLD, load calculation and project specification.
How do 33kV, 35kV, 36kV and 40.5kV relate?
The network operating voltage and equipment rated voltage are not always identical. Selection must follow the required insulation level, earthing system and applicable project standard.
What information is required for a quotation?
Please provide the SLD, system voltage, rated current, short-circuit level, frequency, quantity, protection philosophy, cable details and communication requirements.
Can Qiangchi support SLD and GA development?
Yes. The engineering team can review the customer SLD and prepare project-specific configuration, interface clarification and GA drawings for approval.
Which functional arrangements are available?
Incoming, outgoing, transformer feeder, bus section, bus coupler and measurement arrangements can be engineered according to the approved SLD.
How are dimensions confirmed?
Overall dimensions depend on the feeder arrangement, cable interfaces, protection and auxiliary requirements. Final dimensions are released in the approved GA drawing.
Can FAT be arranged?
Yes. Routine tests, FAT scope, witness points and documentation requirements can be agreed in the project document schedule.
Have a 33โ40.5kV Project?
Send your SLD, BOQ or technical specification for engineering review.
Request QuotationSend SpecificationWhatsApp EngineerVerified model-specific evidence
QCL-40.5 Type-Test Report
Report: SL2025/0696-01
Model: QCL-40.5/1250-31.5
Verified scope: 40.5 kV; 1250 A; 31.5 kA
Test category: Type test โ insulation performance
Test body: Shilian Test (Zhejiang) Co., Ltd.
Status: Original checked.
Model Meaning
QCL identifies the Qiangchi GIS product family; 40.5 identifies the equipment rated-voltage class. Project names may reference 33kV, 35kV, 36kV or 40.5kV systems, but final selection follows the project standard and highest system voltage.
Available rated-current options are 630A, 1250A, 2500A and 3150A according to the selected panel and project configuration.
Service Conditions & Project Confirmation
| Ambient temperature | Subject to project specification and technical confirmation |
|---|---|
| Altitude | State the installation altitude in the RFQ; derating or design review may be required |
| Relative humidity | Confirm maximum and average project conditions |
| Pollution and corrosion | State pollution level, salt mist, dust and corrosive atmosphere where applicable |
| Seismic condition | Project-specific requirement to be confirmed |
| Installation | Indoor or outdoor enclosure, cable entry, room dimensions and service aisle must be specified |
Standards and Technical Compliance
The applicable IEC standards, utility requirements, project specifications, inspection plan and document list are confirmed during technical clarification. Compliance statements apply only to the final approved configuration; no unverified certificate or test claim is implied.
Engineering, Packing & Shipment
After drawing approval, Qiangchi coordinates production, inspection, routine testing and the agreed FAT scope. Finished equipment is protected for handling and export shipment according to cabinet size, destination, transport method and contractual packing requirements.
Related Technical Guides
Review the Product Finder, Product Comparison and Selection Guides.
Request Project Configuration
Send the SLD, BOQ, specification, voltage, current, fault level, quantity and destination.
Reviewed by Qiangchi Engineering Team ยท Updated September 13, 2026
Engineering Answers for QCL Series 40.5kV GIS
What is this product?
QCL Series 40.5kV GIS is a Qiangchi medium-voltage product configured for project-specific distribution requirements.
Which voltage levels are available?
33/35/36/40.5 kV systems; rated current 630 / 1250 / 2500 / 3150 A by project-specific configuration.
Where is it used?
It is used in higher-voltage distribution projects requiring compact gas-insulated switchgear.
How to select the configuration?
Selection follows the system voltage, rated current, short-circuit level, functional units, protection concept, cable interface, installation conditions and approved SLD.
Which standards and tests apply?
Report SL2025/0696-01 covers the original tested scope of 1250 A and 31.5 kA only.
What information is required for quotation?
Send the SLD, system voltage, frequency, rated current, short-circuit level, quantity, project stage, required documents and delivery requirements.