Quick answer
If the offered medium-voltage switchgear design uses a pressure-relief or exhaust path, the RFQ should define the affected sides, direction, room openings, ducts or deflectors, civil works, clearances, access restrictions and acceptance evidence. An internal-arc or enclosure statement alone does not define the installed room route. Ask the supplier to show the offered assembly and identify which building interfaces are by others.
Why the relief path is a purchase decision
A switchgear lineup can be electrically complete while the room interface remains open. Pressure-relief panels, exhaust openings, ducts, barriers, roof penetrations, wall openings and deflectors may affect the room layout, adjacent equipment, escape route, ventilation, fire separation and maintenance access. The buyer should therefore compare the complete equipment-and-room boundary rather than a short classification label.
Use the Medium Voltage Switchgear page to identify the product family. Then attach the relief-path schedule to the single-line, room layout and project enquiry page. Final construction, direction and evidence depend on the offered panel arrangement and project design.
Separate assembly evidence from building work
| Interface | Buyer decision | Evidence to request |
|---|---|---|
| Affected switchgear side | Which front, rear, lateral or top side has a pressure-relief requirement? | Assembly drawing and evidence scope for the offered lineup |
| Relief direction | Where does the gas or pressure path terminate, and what area must remain clear? | Section view, direction arrow and installation limitation |
| Room opening or duct | Who designs and supplies the wall, roof, duct, flap, barrier or deflector? | Civil interface drawing and responsibility matrix |
| Adjacent equipment | Which panels, cables, transformers, walls or walkways must be separated or protected? | Room layout, clearance schedule and site review |
| Access and maintenance | Can doors, shutters, truck paths and inspection routes still operate as planned? | GA, access drawing and maintenance review |
| Acceptance evidence | What document, inspection or site check closes the installed path? | Document register, inspection plan and acceptance record |
This is a procurement framework, not proof that every Jinxing lineup has a specific pressure-relief duct, panel or tested room arrangement. The supplier should mark available, optional, by-others and project-dependent items.
Keep classification and room design separate
The switchgear internal-arc classification procurement guide addresses how buyers request and review assembly evidence. This article focuses on the installed path and civil boundary. A stated classification cannot replace the offered drawing, installation instructions, room constraints or project safety review.
The MV switchgear room layout checklist should be updated with the relief direction, wall or roof opening, maintenance access, escape route, ventilation and future extension. If the room changes after the switchgear drawing is approved, ask the supplier and responsible engineer to review whether the evidence and installation assumptions still apply.
Coordinate cables, ventilation and access
Relief openings must not be hidden by cable trays, bus ducts, partitions, doors, lifting paths or future panels. Check the relationship with cable trenches, cable terminations, room ventilation, drainage, fire interfaces and the location of people during normal operation or maintenance. If an exhaust route leaves the building, identify weather protection and who seals or finishes the opening.
The MV switchgear testing guide can help separate factory evidence, incoming checks and site acceptance. Add a specific room-interface check to the project plan: confirm the installed opening, clear route, barrier or deflector, labels, access condition and responsible sign-off. A factory test cannot prove that a civil opening or site route was built as shown.
Make the quotation comparable
Ask each bidder to provide the same relief-path information with the panel price. Record the affected side, direction, opening size or interface, included hardware, civil exclusions, room assumptions, inspection points, site attendance and any priced alternative. If one offer uses a different panel arrangement or leaves the duct to the building contractor, preserve that as a deviation instead of comparing only the equipment total.
Use the MV switchgear single-line diagram checklist to tie the panel function and room position to the offered lineup. The schedule should identify incomers, feeders, couplers, transformer feeders and any panel whose position changes the relief route.
RFQ checklist
Include the following with a medium-voltage switchgear enquiry:
- Voltage, current, short-circuit duty, frequency, feeder quantity and single-line diagram.
- Panel functions, lineup sequence, room orientation and accessible sides.
- Required pressure-relief or exhaust evidence and the exact offered assembly it covers.
- Relief direction, openings, ducts, barriers, deflectors, weather finish and civil interface.
- Room layout, cable trenches, cable entries, bus ducts, ventilation, escape routes and adjacent equipment.
- Maintenance, truck withdrawal, lifting, inspection, labels and access requirements.
- Factory documents, routine tests, site checks, room-interface inspection and acceptance records.
- Itemized inclusions, civil exclusions, site attendance, priced alternatives and open decisions.
- Destination, quotation stage, approval authority and requested response date.
Review the Medium Voltage Switchgear product family and submit the marked room-interface schedule through Request a Quote. Final pressure-relief arrangement, ratings, evidence and civil responsibilities remain project-specific.
FAQ
Does an internal-arc classification automatically define the room exhaust route?
No. The buyer still needs the offered assembly drawing, installation conditions, direction, clearances and building-interface responsibility for the project arrangement.
Can the civil contractor design the opening from a catalogue panel dimension?
Use the catalogue only for early planning. Before construction release, confirm the actual lineup, pressure-relief direction, opening or duct detail, adjacent clearances and drawing revision.
Is a factory test enough to accept a pressure-relief path?
No. Factory evidence covers the tested equipment boundary. The installed room opening, duct, barrier, clear route, labels and site acceptance records must be checked against the approved project design.