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 our 50,000-square-metre factory in Xuzhou, Jiangsu, China. Our 350+ employees have served utilities in 50+ countries since 2019.
As a factory-direct manufacturer and supplier, we provide HV substation equipment with factory pricing, custom engineering and complete test documentation.
Send your equipment list or single-line diagram. Our export team will respond with a consolidated quotation.
Since 2019 · 50,000m² · 350+ Staff
High Voltage Substation Equipment We Manufacture
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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10kV Dry-Type Transformer-SCBH series Amorphous Alloy
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20-35KV Dry-Type Transformer
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20-35KV SCB Series Epoxy Resin Dry-Type Transformer
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20KV Oil-immersed Distribution Transformer
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35KV Oil-immersed Power Transformer
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6-10KV Oil-Immersed Power Distribution Transformer
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Current Transformer –10KV Indoor High Voltage
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Current Transformer–LMZK Wound Current Transformer300/5a
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Current Transformer–LSY-10 transformer Integrated CT
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current transformer–LXK high voltage zero sequence
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dry type distribution transformer-6-10 KV SCB series epoxy resin cast
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Electrical Transformers–JDZ – 10 Power Voltage
What High Voltage Equipment Does a Substation Need?
High voltage substations need transformers, switchgear, instrument transformers and breakers rated for the incoming voltage – in our 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.
- 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
We manufacture four HV equipment groups:
Power transformers
66-132 kV class units for substation duty.
Switchgear & RMU
KYN28A-12 switchgear and XGN15-12 / HXGN15-12 ring main units.
Vacuum breakers
VS1 indoor and ZW32 outdoor circuit breakers.
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 |
HV Substation Equipment Manufacturing at Our 50,000 m² Factory
From transformer winding to switchgear assembly and breaker testing – every HV unit is built and tested at our 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.
Quality & Testing Center
Routine inspection on every unit before delivery, with type test reports supporting project approval and market certification.
Materials & Components
Core materials, windings and components are checked against the approved bill of materials on every production run.
OEM / ODM / Agency Supply
Custom branding, packaging and configurations for global partners – from nameplate to complete product design – supported by a dedicated export team.
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-Direct
Custom branding, packaging and product variants built on our standard platforms – from a nameplate to full product design.
Custom nameplate · Custom packaging · Full test docs
Wholesale Supply
Volume Pricing
Factory 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 Partners
Dedicated 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 – we will respond with a consolidated quotation and drawings.
Certifications & Quality Assurance
Our HV substation equipment is produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports.
Product Certifications
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?
Contact Subian
Need the Right Specification?
Tell us your target market, product type, quantity and technical requirements. Our team will help you identify a suitable configuration for your project.