High Voltage Substation Equipment Manufacturers – One-Stop HV Supply
Subian Electric manufactures high voltage substation equipment – power transformers, HV switchgear and circuit breakers up to 132 kV class – 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 HV substation equipment with factory pricing, custom engineering and complete test documentation.
Send your equipment list or single-line diagram. Subian’s export team will respond with a consolidated quotation.
High Voltage Substation Equipment Manufactured by Subian
HV power transformers, switchgear, ring main units and vacuum circuit breakers for substations up to 132 kV class – tested and documented for grid and industrial projects.
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35KV Oil-immersed Power Transformer
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Indoor Vacuum Circuit Breaker–ZN85-40.5
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Oil-immersed Distribution Transformer-High Voltage 110KV-132KV
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Oil-Immersed Transformer-High Voltage 66KV
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Vacuum/SF6 Circuit Breaker–LW3-12 630A 3-Pole Outdoor Pole-Mounted
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withdrawable AC metal-enclosed switchgear – KYN28A-12
What High Voltage Equipment Does a Substation Need?
High voltage substations need transformers, switchgear, instrument transformers and breakers rated for the incoming voltage – in Subian’s range from 12 kV up to 132 kV class. Each item must meet strict test and safety requirements.
Sourcing HV substation equipment from one accountable manufacturer keeps interfaces consistent, documentation complete and responsibility clear – factors that decide project success.
What Buyers Check Before Ordering
- Complete HV set – transformers, switchgear, RMU and breakers.
- Up to 132 kV class – voltage classes for substation duty.
- Utility-grade testing – type test evidence for grid approvals.
- 50,000m² factory – in-house winding, assembly and testing.
- 350+ employees – engineering, quality and export teams.
- OEM / ODM & wholesale – custom branding, packaging and volume supply.
Main Types of High Voltage Substation Equipment
Subian manufactures four HV equipment groups:
Power transformers
Configuration
66-132 kV class units for substation duty.
IEC / project specification
Switchgear & RMU
MV ring
KYN28A-12 switchgear and XGN15-12 / HXGN15-12 ring main units.
RMU / 630 A / 20 kA 3 s
Vacuum breakers
Configuration
VS1 indoor and ZW32 outdoor circuit breakers.
IEC / project specification
High Voltage Substation Equipment Specifications
| Parameter | Specification |
|---|---|
| Voltage | 12 kV – 132 kV class |
| Transformers | 30 kVA – 63000 kVA |
| Switchgear | IEC 62271 / GB 3906 |
| Breakers | VS1 / ZW32 / ZW20 / ZW7 |
| Frequency | 50/60 Hz |
| Standard | IEC 60076 / IEC 62271 |
How to Compare High Voltage Substation Equipment 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 |
|---|---|---|
| Enclosure construction | A steel box | Gauge, insulation, roof slope and the walk-in or non-walk-in choice |
| Ventilation | Passive louvers | Air path, filter class and the internal temperature rise at full load |
| Earthing | A terminal provided | Earth bar size, earth switch and the touch-voltage calculation |
| Auxiliary supply | Not mentioned | AC and DC auxiliary circuits, battery autonomy and the alarm list |
| SCADA interface | Optional | Protocol, points list and whether IEC 61850 is required |
| Documentation | Wiring diagrams | SLD, wiring, setting sheets and the as-built set in the agreed language |
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.
High Voltage Substation Equipment Standards Buyers Ask For
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 62271-202 | Prefabricated substations | Compact and skid-mounted packages |
| IEC 60076-1 | Power transformers | The transformer inside the package |
| IEC 62271-200 | MV switchgear | RMU and incoming panels |
| IEC 61439-2 | LV assemblies | The LV distribution board |
| IEEE C57.12.28 | Enclosure integrity and tamper resistance | Public-access sites in North America |
| IEC 60529 | Degrees of protection (IP code) | Outdoor and coastal sites |
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.
HV Substation Equipment Manufacturing at Subian’s 50,000 m² Factory
From transformer winding to switchgear assembly and breaker testing – every HV 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.
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Quality & Testing Center
Routine inspection on every unit before delivery, with type test reports supporting project approval and market certification.
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Materials & Components
Core materials, windings and components are checked against the approved bill of materials on every production run.
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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 HV Substation Equipment Supply
Utilities and EPC contractors can brand or resell HV equipment 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
Complete HV Package vs Equipment From Separate Vendors
HV equipment interfaces matter – transformer impedance, switchgear ratings and breaker coordination must match. A single manufacturer tests the set together and stands behind the whole package.
For grid and industrial projects, package supply reduces approval time and commissioning risk.
Choosing a High Voltage Substation Equipment Manufacturer
Verify type test evidence for each HV family and the manufacturer’s integration capability. HV failures are expensive – documentation and testing deserve scrutiny.
Subian Electric offers a 50,000m² factory, 350+ employees, ISO9001, CE and UL certification and export to 50+ countries.
Send your equipment list – Subian will respond with a consolidated quotation and drawings.
Certifications & Quality Assurance
Subian’s HV substation equipment 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
High Voltage Substation Equipment FAQ
Answers to the questions buyers ask most about high voltage substation equipment.
What high voltage equipment do you manufacture?
Can you supply a complete HV package?
What type tests are performed?
Do you provide type test reports?
What is the minimum order quantity?
What are your delivery terms?
What is included in a High Voltage Substation Equipment?
Is a walk-in enclosure available?
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.