YXRM-40.5 Gas-Insulated Switchgear
The YXRM-40.5 gas-insulated switchgear is manufactured by LYE Technology as a 35 kV SF6 fully enclosed, fully insulated compact ring main unit. The 3 mm stainless steel enclosure is fibre laser cut and robot welded, giving a sealed design that stays effectively maintenance-free in dust, humidity, salt and chemical exposure.
- Voltage class: 35 kV SF6 gas-insulated switchgear
- Design: Fully enclosed, fully insulated compact ring main switchgear
- Enclosure: 3 mm stainless steel, fibre laser cut and robot welded
- Protection: IP67 gas compartment, IP4X remaining compartments
- Standards: GB/T 11022-1999, GB 3906-2006, GB 3804-2004 and related
Gas-Insulated Switchgear: Key Features & Typical Use
Sealed Against the Environment
A fully enclosed, fully insulated gas design means dust, humidity, salt and airborne contamination never reach the live parts. That is why the YXRM-40.5 is chosen for sites where air-insulated switchgear needs frequent cleaning: highway installations, tunnel construction power, metro stations, coastal and industrial areas where the atmosphere is aggressive.3 mm Stainless Steel, Laser Cut and Robot Welded
The enclosure is formed from 3 mm stainless steel plate, cut on fibre laser equipment and welded by welding robots. Laser cutting gives an accurate edge before forming, and robot welding keeps deformation low and the weld pool consistent, which together determine how well the sealed compartment holds its insulating gas over the service life.Small Footprint, Effectively Maintenance-Free
Because the insulating medium sits inside the enclosure instead of around it, the unit occupies far less indoor space than an air-insulated switchboard of the same rating. The design intent is that once the equipment is commissioned, routine service is limited to inspection, which reduces the long-term operating cost and the risk of human error during maintenance.Independent Modules, Independent Relief
Each functional unit is an independent module, which makes factory assembly straightforward and on-site extension possible without rebuilding the board. Every sealed compartment has its own pressure-relief channel, so an internal fault vents away from the operator and from neighbouring units rather than through the operating face.Gas-Insulated Switchgear Specifications & Technical Data
| Parameter | Details |
|---|---|
| Product | YXRM-40.5 gas-insulated switchgear |
| Voltage class | 35 kV SF6 gas-insulated switchgear |
| Design type | Fully enclosed, fully insulated compact ring main switchgear |
| Enclosure material | 3 mm stainless steel plate |
| Fabrication | Fibre laser cutting followed by robot welding |
| Functional units | Independent modules for easy assembly |
| Pressure relief | Independent relief channel for each sealed compartment |
| Gas compartment degree of protection | IP67 |
| Other compartment degree of protection | IP4X |
| Service requirement | Effectively maintenance-free |
| Applicable standards | GB/T 11022-1999, GB 3906-2006, GB 3804-2004, GB 16926-2009, GB/T 11023-1999, GB 1984-2003, GB 1985-2004 |
| Typical applications | Medium and small secondary substations, switching stations, plants and mining enterprises |
| Special applications | Residential areas, highways, metro stations, tunnel construction |
YXRM-40.5 — Fully Insulated 35 kV Switchgear for Hard Environments
Some sites cannot keep switchgear clean. Dust from a highway, moisture in a tunnel, salt air near a coast or chemical vapour in a plant will eventually find any air-insulated busbar. The YXRM-40.5 removes that failure mode by sealing the live parts inside a fully insulated gas enclosure rated 35 kV.This equipment is also described as 35 kV gas insulated switchgear, a medium-voltage GIS panel, or an SF6 ring main unit, and it is compared with air-insulated and solid-insulated alternatives. For a site where the switchroom cannot be kept clean, the sealing method matters more than the nameplate, so the questions worth asking a manufacturer are the enclosure thickness, how the seams are welded and how each compartment vents during a fault.The enclosure is 3 mm stainless steel, cut on fibre laser equipment and welded by robots so the seams stay accurate and repeatable. Each functional unit is an independent module and each sealed compartment has its own relief channel, which keeps both assembly and fault containment predictable.The unit is installed in medium and small secondary substations, switching stations, plants and mining enterprises, and in residential areas, highways, metro stations and tunnel construction where reliability and a small footprint matter more than first cost. LYE manufactures the enclosure in-house and supplies documentation against the applicable GB standards.Factory-Direct Gas-Insulated Switchgear Manufacturer & OEM / ODM
We Manufacture, You Brand
LYE Technology (Zhejiang) Co., Ltd. is a national high-tech enterprise and manufacturer in Wenzhou, China: sheet-metal fabrication, welding, powder coating, busbar machining and final assembly run on our own factory lines, and every unit is function-tested before it leaves the works. A YXRM-40.5 Gas-Insulated Switchgear that reaches your site carries the routine test behind it, not just the rating on the nameplate.We are one of the Top 10 Brands of China's small power distribution boxes and a drafter of national standards in this category, and we hold ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification. Because we are the manufacturer rather than a trading company, our sales engineers quote from your drawing in factory-direct terms, and OEM or ODM work is produced on the same lines as our standard products.For the YXRM-40.5 we laser cut and robot weld the stainless enclosure in-house, so an enclosure variant for a specific site condition is a controlled design change rather than a new supply chain.- OEM branding — custom colours, laser marking and your own project or retail packaging, applied at the factory.
- ODM options — ratings, configurations and internal layouts built around your drawings or single-line diagram.
- Certification — ISO9001, ISO14001, ISO45001, CCC, CE and TUV, with test documents supplied per project.
- MOQ — flexible quantities for a project or a trial order, with mixed types welcome in one shipment.
YXRM-40.5 stainless steel enclosure after laser cutting and welding
Fully insulated ring main unit ready for shipment
Gas-Insulated Switchgear Buying Guide from the Manufacturer
For 35 kV equipment the site conditions usually decide the specification. These are the points we confirm before a YXRM-40.5 order is drawn.
- Confirm the system voltage class, frequency and required short-circuit rating.
- Describe the site environment, including dust, humidity, salt or chemical exposure.
- Set the incoming, outgoing and bus-tie arrangement and the number of functional units.
- Confirm the required protection ratings and the operating access you expect.
- Send the single-line diagram, room or foundation dimensions and cable termination details.
- Approve drawings, then production with gas-tightness, insulation and functional testing.
Manufacturer & Sales Support for Wholesale Buyers
OEM / ODM
Learn more →Factory colours · Logo marking · Custom layout
Wholesale
Learn more →Factory pricing · Flexible MOQ · Global shipping
Distributor Support
Learn more →Account manager · Drawing support · Priority lead times
Need 35 kV Gas-Insulated Switchgear for a Hostile Site?
OEM/ODM, wholesale pricing and distributor support straight from the manufacturer — one enquiry gets you a factory-direct quotation for the YXRM-40.5 Gas-Insulated Switchgear, sized to your single-line diagram, environmental conditions and the room or foundation dimensions available, with type-test documentation under the applicable GB standards for 3.6 kV to 40.5 kV metal-enclosed switchgear. Our sales team replies with a specification and an indicative price, so send your drawings and quantity.Contact Our Sales TeamGas-Insulated Switchgear — Frequently Asked Questions
What is gas insulated switchgear?
Gas insulated switchgear, usually shortened to GIS, is high-voltage or medium-voltage switchgear in which the live parts are enclosed in sealed compartments insulated with an insulating gas rather than air. The design is compact, unaffected by dust and humidity, and effectively maintenance-free, which is why it is used in tunnels, coastal installations, mines and dense urban substations.What is a 35 kV gas insulated switchgear used for?
It receives and distributes electrical energy at 35 kV where the environment would degrade air-insulated equipment. Typical installations are medium and small secondary substations, switching stations, plants and mining enterprises, residential areas, highways, metro stations and tunnel construction sites, and it is also used where indoor space is too limited for an air-insulated board of the same rating.What is the difference between air-insulated and gas-insulated switchgear?
AIS relies on air at atmospheric pressure and needs generous clearances, so it takes more floor area and is affected by dust, humidity and pollution; it is cheaper up front and easier to inspect. GIS encloses the live parts in a sealed insulating medium, so it is compact, insensitive to the environment and effectively maintenance-free, at higher first cost and with less visible inspection access.Who are the main medium-voltage switchgear manufacturers?
The market includes international brands and a group of manufacturers in China who build to the same GB and IEC standards, so the same voltage class and rating can be delivered at quite different levels of build quality. Ask how the enclosure is fabricated and welded, whether gas tightness is tested on the finished unit, and which type-test documentation is supplied. LYE manufactures the YXRM-40.5 stainless enclosure in Wenzhou and holds ISO9001, ISO14001, ISO45001, CCC, CE and TUV certification.How much does 35 kV gas insulated switchgear cost?
Indicative factory-direct pricing is roughly US$3,000 to US$20,000 per cubicle or unit, depending on the number of functional units, the switching arrangement, the degree of protection and the quantity. Because the equipment is specified as a scheme against the single-line diagram and the room or foundation dimensions, those two documents are what turn an indicative band into a firm factory-direct figure.
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Use a distribution box for final circuits and compact branch protection; use a cabinet when the project needs larger incoming capacity, more feeder groups, metering, busbars or greater internal separation. The final choice should be checked against the single-line diagram, device list, available installation space and local project rules.
Provide the device schedule, circuit quantity, component dimensions, cable-entry direction, mounting method and required spare capacity. LYE also reviews door clearance, bending radius, heat-producing devices and the usable depth behind the mounting plate before confirming an enclosure size.
Start with the actual exposure to dust, rain, cleaning water and accidental contact rather than choosing the highest number by default. Cable entries, ventilation, door seals and installation workmanship affect the finished assembly, so the target rating and verification basis must be confirmed for the specific product and project.
Coated or galvanized steel is commonly considered for general indoor service, stainless steel for humid or corrosive locations, and engineering plastic for lightweight non-metallic applications. Material grade, thickness, UV exposure, chemical contact and earthing requirements must be confirmed against the installation environment.
Share the component heat load, ambient temperature, solar exposure, duty cycle and allowable internal temperature. LYE can then review enclosure volume, spacing, ventilation or fan provisions, sun shields, heaters or drainage details; the final thermal design remains tied to the installed equipment and site conditions.
Yes. A dimensioned drawing is preferred, but a physical sample and clear reference photographs can also start the review. Material, thickness, openings, hardware, finish, labels, inspection points and packing are recorded before sampling or repeat production.
PDF and common 2D CAD drawings are suitable for most enclosure enquiries, while 3D files can help with complex assemblies. Include a revision number, units, tolerances and component references; file compatibility and any missing production information will be confirmed during review.
A sample or first article can be arranged for a new or customized product. The approval plan should identify dimensions, openings, fit, appearance, hardware, labels and packaging, together with the sample cost and timing agreed for the actual order.
Available documents may include approved drawings, packing lists, dimensional or appearance inspection records, product data and certificates applicable to the confirmed model. Destination-specific declarations or third-party testing must be requested before order placement so availability and scope can be verified.
Lead time is confirmed after the product scope, quantity, sample requirement and finish are known. Packing is reviewed against product weight, surface protection, destination and shipping method; if an issue is found after delivery, send the order reference, label, photographs and quantity affected so it can be traced and reviewed.
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