Direct Recommendation
A custom MV switchgear RFQ should define the single-line diagram, voltage, current, fault level, feeder duties, busbar arrangement, breaker and earthing functions, CT/VT and relays, interlocks, control voltage, communication, cable entry, dimensions, tests, and documents.
For industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution, the useful deliverable is not another broad definition. It is a marked specification, a deviation list, and enough project information for a supplier to identify the correct equipment family. Start from Medium Voltage Switchgear; those pages define the current public Jinxing product scope.
Decision Summary
- Buyer intent: RFQ guide.
- Project context: industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution.
- First evidence to prepare: the approved single-line diagram plus the equipment data sheet, load schedule, or feeder schedule that applies to this request.
- Expected supplier response: a model-family match, marked technical exceptions, applicable evidence, missing inputs, and a defined quotation boundary.
Product Scope Relevant to custom medium voltage switchgear
The rows below are limited to products already published on the Jinxing website. Use them to identify the relevant family and voltage class, then verify the actual rating, arrangement, components, tests, and documents against the project specification.
| Jinxing product | Public voltage scope | Typical website application | Use this page to |
|---|---|---|---|
| HXGN-12/HXGN-24/HXGN-40.5 | 12kV / 24kV / 40.5kV | Ring networks and compact substations | Check the model family and send project-specific requirements |
| KYN28A-12/KYN28A-24/KYN61-40.5 | 12kV / 24kV / 40.5kV | Substations, factories, power plants | Check the model family and send project-specific requirements |
| JXHG-12/JXHG-24/JXHG-40.5 | 12kV / 24kV / 40.5kV | Feeder output and load distribution | Check the model family and send project-specific requirements |
Quotation-ready specification structure
A useful RFQ defines the system, equipment duty, physical interfaces, verification scope, and commercial boundary in one package. For custom medium voltage switchgear, the review should produce the following evidence or decision at each stage.
| Review area | Question to close | Evidence or output |
|---|---|---|
| System definition | Single-line diagram, source, load, fault level, earthing, and operating philosophy | Approved electrical design basis |
| Equipment schedule | Ratings, feeder or transformer duties, quantities, spares, and future provision | Data sheet and equipment list |
| Interfaces | Cable, busduct, control, communication, civil, room, enclosure, and environmental constraints | Interface and layout drawings |
| Acceptance and delivery | Standards, tests, documents, inspection, packing, destination, and target date | Document and commercial schedule |
Stop and clarify the offer when any of these red flags appear:
- Requesting a price from only a product name and voltage.
- Missing fault level, feeder schedule, or installation environment.
- Not defining drawings, tests, packing, and delivery boundary.
Six Technical Decisions to Record
These six decisions are selected for the rfq guide behind custom medium voltage switchgear.
| Decision | Why it changes the offer | Required project input |
|---|---|---|
| Voltage class and ratio | Match the upstream supply, downstream system, insulation coordination, and local utility requirements. | Record the project value or mark it as an open voltage class and ratio clarification |
| Short-circuit duty | The single-line diagram and system study should define fault level, breaking duty, short-time withstand, and busbar requirements. | Record the project value or mark it as an open short-circuit duty clarification |
| Feeder function | Separate incomer, outgoing, transformer feeder, motor feeder, bus coupler, metering, and compensation duties. | Record the project value or mark it as an open feeder function clarification |
| Metering and instrument transformers | Confirm CT/VT ratios, accuracy duties, burden, meter ownership, utility approval, and terminal arrangements. | Record the project value or mark it as an open metering and instrument transformers clarification |
| Interlocks and operating sequence | Verify mechanical and electrical interlocks against the intended switching sequence and safety procedure. | Record the project value or mark it as an open interlocks and operating sequence clarification |
| Drawings and test documents | List required GA drawings, single-line diagrams, nameplate data, routine tests, report references, certificates, and shipping documents. | Record the project value or mark it as an open drawings and test documents clarification |
Engineering Review Notes
1. Voltage class and ratio
Match the upstream supply, downstream system, insulation coordination, and local utility requirements. In the context of industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution, write this decision into the custom medium voltage switchgear data sheet and ask the supplier to mark any deviation. The review output should be a value, drawing reference, calculation input, or explicit technical clarification rather than an unrecorded assumption.
2. Short-circuit duty
The single-line diagram and system study should define fault level, breaking duty, short-time withstand, and busbar requirements. In the context of industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution, write this decision into the custom medium voltage switchgear data sheet and ask the supplier to mark any deviation. The review output should be a value, drawing reference, calculation input, or explicit technical clarification rather than an unrecorded assumption.
3. Feeder function
Separate incomer, outgoing, transformer feeder, motor feeder, bus coupler, metering, and compensation duties. In the context of industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution, write this decision into the custom medium voltage switchgear data sheet and ask the supplier to mark any deviation. The review output should be a value, drawing reference, calculation input, or explicit technical clarification rather than an unrecorded assumption.
4. Metering and instrument transformers
Confirm CT/VT ratios, accuracy duties, burden, meter ownership, utility approval, and terminal arrangements. In the context of industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution, write this decision into the custom medium voltage switchgear data sheet and ask the supplier to mark any deviation. The review output should be a value, drawing reference, calculation input, or explicit technical clarification rather than an unrecorded assumption.
5. Interlocks and operating sequence
Verify mechanical and electrical interlocks against the intended switching sequence and safety procedure. In the context of industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution, write this decision into the custom medium voltage switchgear data sheet and ask the supplier to mark any deviation. The review output should be a value, drawing reference, calculation input, or explicit technical clarification rather than an unrecorded assumption.
6. Drawings and test documents
List required GA drawings, single-line diagrams, nameplate data, routine tests, report references, certificates, and shipping documents. In the context of industrial plants, utility interfaces, power stations, infrastructure, and project-specific distribution, write this decision into the custom medium voltage switchgear data sheet and ask the supplier to mark any deviation. The review output should be a value, drawing reference, calculation input, or explicit technical clarification rather than an unrecorded assumption.
Applicable Evidence and Its Limits
The Jinxing website references GB/T 3906, IEC 62271 reference support for the relevant product families. These are standards families or project references to discuss. They are not a statement that every rating, arrangement, component, or optional test is automatically covered by the same document.
Public evidence available for early review includes:
For this rfq guide, request a document register that ties each report, certificate, drawing, and routine test to the quoted model or project. Sample evidence supports early qualification; final acceptance records must match the approved configuration and contractual inspection plan.
RFQ Package for custom medium voltage switchgear
Use this product-specific structure instead of sending only a keyword, catalogue request, or target price.
| RFQ section | Information to provide |
|---|---|
| Single-line diagram | Voltage, current, bus scheme, incomers, outgoing feeders, bus couplers, and future ways |
| Fault and switching duty | Fault level, short-time withstand, breaker or load-break-switch duty, and earthing switch |
| Protection and control | CT/VT data, relays, meters, control voltage, communication, and interlock logic |
| Physical scope | Cable sizes and entry, dimensions, internal arc requirement, tests, drawings, and delivery target |
Add the project name, inquiry stage, destination country, quantity, local utility or owner rules, trade terms, and delivery target. If information is not yet available, mark it as "to be confirmed" so the quotation can separate assumptions from confirmed requirements.
Related Guide Cluster
Continue with the closest guides in this product cluster:
- Metal-Clad vs Metal-Enclosed Switchgear
- Medium-Voltage Switchgear Testing Guide
- Medium-Voltage Switchgear Manufacturers Checklist
Send the Project to Jinxing
Use the Jinxing inquiry form to send the single-line diagram and completed RFQ fields. Ask for the closest Jinxing product match, a list of missing technical inputs, applicable document references, and a quotation that states inclusions and exclusions.
Editorial Scope
Research and drafting were assisted by keyword and generative tools. Product names, routes, public voltage classes, application descriptions, and evidence links were checked against the current Jinxing website data used by this publication workflow. Final engineering, compliance, price, and delivery details require project-specific written confirmation.