Electrical Transmission Substation Manufacturers – High Voltage Supply
Subian Electric manufactures equipment for electrical transmission substations – power transformers up to 132 kV class, HV switchgear and circuit breakers – at our 50,000-square-metre factory in Xuzhou, Jiangsu, China. Our 350+ employees have served grid operators in 50+ countries since 2019.
As a factory-direct manufacturer and supplier, we provide transmission substation equipment with factory pricing, custom engineering and complete test documentation.
Send your voltage, rating and standard. Our export team will respond with a quotation and technical proposal.
Since 2019 · 50,000m² · 350+ Staff
Transmission Substation Equipment We Manufacture
Power transformers up to 132 kV class, HV switchgear and vacuum circuit breakers for transmission and sub-transmission substations, with type test documentation.
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Transformador de tipo seco de 10kV - serie SCBH Aleación Amorfosa
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Transformador de tipo seco de 20-35KV
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Transformador de tipo seco de resina epóxica serie SCB de 20-35KV
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Transformador de distribución sumergido en aceite de 20KV
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Transformador de Potencia Sumergido en Aceite de 35KV
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Transformador de distribución de potencia sumergido en aceite de 6-10KV
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Transformador de Corriente –10KV Interior Alta Tensión
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Transformador de corriente–Transformador de corriente enrollado LMZK 300/5a
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Transformador de corriente–LSY-10 transformador CT integrado
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transformador de corriente–LXK secuencia cero de alta tensión
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transformador de distribución de tipo seco - serie SCB de resina epóxica de 6-10 KV
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Transformadores eléctricos–JDZ – 10 Voltaje de potencia
What Equipment Does a Transmission Substation Need?
A transmission substation steps voltage between transmission and sub-transmission levels, or feeds regional distribution from the high voltage network. Its core equipment – power transformers, HV switchgear and breakers – must meet the highest reliability standards.
Transmission substation equipment operates at 66-132 kV class in our range, engineered for continuous duty, high fault levels and demanding utility specifications.
- 66-132 kV class – power transformers for transmission duty.
- HV switchgear & breakers – switchgear and vacuum circuit breakers for substations.
- 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 Transmission Substation Equipment
We manufacture three equipment types for transmission substations:
Transformadores de potencia
66-132 kV class units for grid duty.
HV switchgear
Metal-enclosed switchgear for substation control.
Vacuum circuit breakers
Outdoor and indoor breakers for fault protection.
Transmission Substation Equipment Specifications
| Parámetro | Specification |
|---|---|
| Transformadores de potencia | 1000 kVA – 63000 kVA, 66-132 kV |
| Switchgear | 12-40.5 kV, IEC 62271 |
| Breakers | VS1 / ZW32 / ZW20 / ZW7 |
| Frecuencia | 50/60 Hz |
| Refrigeración | ONAN / ONAF |
| Estándar | IEC 60076 / IEC 62271 |
Transmission Substation Equipment Manufacturing
From transformer winding to switchgear assembly and breaker testing – every unit is built and tested at our Xuzhou facility with utility-grade documentation.
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 Transmission Substation Equipment Supply
Grid operators and EPC contractors can brand or resell 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
Transmission vs Distribution Substation Equipment
Transmission substation equipment operates at higher voltage (66-132 kV in our range) with stricter fault and test requirements. Distribution equipment covers 6-35 kV with different duty profiles.
We manufacture both classes and confirm the right specification for your network position.
Choosing a Transmission Substation Equipment Manufacturer
Transmission equipment demands utility-grade type tests, documented materials and long-term reliability. Verify test evidence and reference deliveries to grid operators.
Subian Electric offers a 50,000m² factory, 350+ employees, ISO9001, CE and UL certification and export to 50+ countries.
Request a quotation with your voltage and rating – we confirm the design before production.
Certifications & Quality Assurance
Our transmission substation equipment is produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports to 110 kV class.
Product Certifications
Transmission Substation Equipment FAQ
Common questions about transmission substation equipment and factory sourcing.
¿Qué equipo suministran para las subestaciones de transmisión?
What voltage classes do you cover?
What testing is required for grid duty?
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.