High Voltage Gas Insulated Switchgear Manufacturers – Compact GIS Supply
Subian Electric manufactures high voltage gas insulated switchgear – the XGN15-12 inflatable ring main unit – at its 50,000-square-metre factory in Xuzhou, Jiangsu, China. Subian’s 350+ employees have served utilities in 50+ countries since 2019.
As a factory-direct manufacturer and supplier, Subian provides gas insulated RMUs with compact footprints, factory pricing and complete test documentation.
Send your network configuration and requirements. Subian’s export team will respond with a quotation and drawings.
Gas Insulated Ring Main Units Manufactured by Subian
XGN15-12 inflatable gas insulated ring main units for 12 kV loop networks and compact substations – compact, sealed and maintenance-free.
-
Indoor High Voltage Vacuum Load Break Switch–FZN25 FZRN25 12KV 24kV
-
Inflatable Ring Network Switchgear–XGN15-12
-
metal-enclosed ring network switchgear – HXGN15-12 AC
-
outdoor vacuum circuit breaker–ZW32-12
-
Vacuum/SF6 Circuit Breaker–LW3-12 630A 3-Pole Outdoor Pole-Mounted
-
withdrawable AC metal-enclosed switchgear – KYN28A-12
What Is High Voltage Gas Insulated Switchgear?
Gas insulated switchgear (GIS) seals the live components in an insulating gas, allowing a much smaller footprint than air-insulated designs. The XGN15-12 RMU is the standard GIS format for distribution.
Gas insulated RMUs suit urban networks, compact substations and indoor installations where space is at a premium and maintenance access is limited.
What Buyers Check Before Ordering
- Compact footprint – sealed gas insulation saves space.
- Maintenance-free – sealed design reduces service work.
- 12 kV class – standard for distribution RMUs.
- 50,000m² factory – in-house assembly and testing.
- 350+ employees – engineering, quality and export teams.
- OEM / ODM & wholesale – custom branding, packaging and volume supply.
Main Types of Gas Insulated Switchgear
Subian manufactures two GIS configurations:
Ring main unit
MV ring
Compact 2-3 function units for loop networks.
RMU / 630 A / 20 kA 3 s
Transformer feeder unit
Configuration
GIS with transformer protection functions.
IEC / project specification
Gas Insulated Switchgear Specifications
| Parameter | Specification |
|---|---|
| Rated voltage | 12 kV |
| Rated current | 630 A |
| Breaking capacity | 20 kA / 25 kA |
| Gas | SF6 / clean-air options |
| Frequency | 50/60 Hz |
| Standard | IEC 62271 / GB 3906 |
How to Compare High Voltage Gas Insulated Switchgear Suppliers
Quotations for this equipment often look identical on the first page. The difference sits in what is attached behind the number, and in the three or four lines that decide the installed cost rather than the purchase price.
| What to compare | What a thin quotation leaves out | What to ask for |
|---|---|---|
| Rated voltage and current | A busbar rating with no basis | Rated voltage, main busbar current and the short-time withstand current |
| Short-circuit withstand | Peak value only | Icw for 1 s and Ipk, to IEC 61439-2 or IEC 62271-200 |
| Form of separation | The word compartmentalised | Form 2b, 3b or 4b, and whether the busbar is separated |
| Internal arc classification | Not stated | IAC class and the test report, for MV equipment |
| Device origin | A brand name with no model | Breaker model, breaking capacity and the manufacturer certificate |
| Routine test | A visual check only | Insulation resistance, HV test, interlock and functional test records |
Buyers who compare on price alone usually discover the gap at commissioning. The six lines above are the ones that decide whether the unit or the panel can be energised without site work. OEM and ODM supply is available where the nameplate, manual and packing have to carry a different brand.
Which Standard Applies to High Voltage Gas Insulated Switchgear
The purchase specification decides the insulation level, the enclosure test and the nameplate data. These are the standards buyers normally name in the enquiry.
| Standard | What it covers | When it is asked for |
|---|---|---|
| IEC 61439-2 | LV assemblies: design verification and routine test | Any LV panel for IEC markets |
| IEC 62271-200 | MV metal-enclosed switchgear up to 52 kV | RMU and KYN-type panels |
| IEC 62271-100 | High-voltage circuit breakers | Vacuum and SF6 breakers |
| IEC 60529 | Degrees of protection (IP code) | Outdoor and dusty installations |
| IEC 60947-2 | Low-voltage circuit breakers | Device selection inside the panel |
| GB 7251.1 / GB 3906 | Chinese equivalents for LV and MV assemblies | Domestic projects and CNAS reports |
Where two standards conflict, the purchase specification wins and the conflict is recorded on the drawing before production. Type test reports are issued against the model, so ask for the report that names the rating you are buying.
GIS Manufacturing at Subian’s 50,000 m² Factory
From enclosure assembly to gas filling, sealing and testing – every GIS unit is built and tested at Subian’s Xuzhou facility.
Production Workshop
Controlled winding, core processing and vacuum drying with quality checkpoints between every stage, so quality is built in from the start.
Learn More →
Quality & Testing Center
Routine inspection on every unit before delivery, with type test reports supporting project approval and market certification.
Learn More →
Materials & Components
Core materials, windings and components are checked against the approved bill of materials on every production run.
Learn More →
OEM / ODM / Agency Supply
Custom branding, packaging and configurations for global partners – from nameplate to complete product design – supported by a dedicated export team.
Learn More →OEM/ODM & Wholesale GIS Supply
Utilities and distributors can brand or resell GIS units with custom nameplates and documentation.
OEM / ODM
Factory-DirectCustom branding, packaging and product variants built on Subian’s standard platforms – from a nameplate to full product design.
Custom nameplate · Custom packaging · Full test docs
Wholesale Supply
Volume PricingFactory pricing with flexible container quantities, mixed models per container and reliable global shipping for volume buyers and importers.
Container MOQ · Mixed models · Global shipping
Distributor Support
Channel PartnersDedicated account management, technical documentation and priority production for distributors and project clients.
Account manager · Sales material · Priority lead times
Gas Insulated vs Air Insulated Switchgear
Gas insulated switchgear is far more compact and virtually maintenance-free, at higher cost; air insulated designs are cheaper but need much more space and regular maintenance.
For urban and indoor sites, the space saving of GIS usually justifies the cost.
Choosing a Gas Insulated Switchgear Manufacturer
Verify pressure sealing, type test evidence and gas handling compliance – the factors that define GIS reliability.
Subian Electric offers a 50,000m² factory, 350+ employees, ISO9001, CE and UL certification and export to 50+ countries.
Send your network configuration – Subian will respond with a quotation and drawings.
Certifications & Quality Assurance
Subian’s gas insulated switchgear is produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports.
Product Certifications
10 kV Dry-Type Transformer Certificate
35 kV Transformer CB Certificate
35 kV Transformer CE Verification
Transformer CE Certificate
Dry-Type Transformer Test Verification
ISO 14001 Environmental Management
ISO 45001 Health & Safety
ISO 9001 Quality Management
110 kV Transformer Type Test Report
UL Certificate of Compliance
Gas Insulated Switchgear FAQ
Answers to the questions buyers ask most about gas insulated switchgear.
What is gas insulated switchgear?
What is the XGN15-12?
Why choose GIS over air-insulated switchgear?
What gas is used?
Do you provide type test reports?
What is the minimum order quantity?
What is the lead time for High Voltage Gas Insulated Switchgear?
Which standard is High Voltage Gas Insulated Switchgear built to?
Contact Subian
Need the Right Specification?
Tell Subian your target market, product type, quantity and technical requirements. Subian’s team will help you identify a suitable configuration for your project.