High Voltage Electrical Equipment Manufacturers – Complete Factory Supply From China
Jiangsu Subian Power Equipment Co., Ltd. designs and manufactures high voltage electrical equipment – HV switchgear, ring main units, vacuum circuit breakers, power transformers and prefabricated substations – from our 50,000-square-metre factory in Xuzhou, Jiangsu, China. Since 2019, our 350+ employees have supplied power grids, renewable energy projects, industrial facilities and infrastructure projects in more than 50 countries.
As a factory-direct manufacturer and supplier, we provide complete high voltage equipment packages with custom engineering, type test documentation, factory pricing and OEM/ODM support – one accountable partner for transformers, switchgear and circuit breakers up to 110 kV class.
Send us your equipment list or single-line diagram. Our export team will respond with a consolidated quotation, lead time and drawings for approval.
Since 2019 · 50,000m² · 350+ Staff
High Voltage Equipment We Manufacture
Browse our high voltage equipment range: XGN15-12 and HXGN15-12 ring main units, KYN28A-12 withdrawable switchgear, VS1 and ZW32 vacuum circuit breakers, 66 kV to 132 kV power transformers and complete substation packages – factory-tested to IEC and GB standards.
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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 Is High Voltage Electrical Equipment? Types & Buyer Guide
High voltage electrical equipment covers the switchgear, transformers, circuit breakers and substation packages that operate above 1 kV – in our case from 6 kV to 110 kV class. It carries higher technical and safety risk than LV equipment, so the manufacturer’s test capability and documentation deserve close scrutiny.
Utilities, industrial plants, renewable projects and infrastructure sites rely on high voltage equipment to distribute power safely and reliably. Buying the transformer, switchgear and circuit breakers from one accountable manufacturer removes interface risk and simplifies approval, commissioning and after-sales support.
- Complete product range – switchgear, RMU, vacuum circuit breakers, transformers and substations from one factory.
- 110 kV capability – power transformers up to 132 kV class with type test reports.
- 50,000m² factory – in-house winding, assembly, drying, integration and testing.
- 350+ employees – engineering, production, quality and export teams under one roof.
- Type test evidence – impulse, partial discharge and temperature-rise reports for each product family.
- ISO9001, CE & UL – certified production with documentation for your target market.
Main Types of High Voltage Electrical Equipment
Three equipment families cover most high voltage projects:
Switchgear & RMU
XGN15-12 and HXGN15-12 ring main units plus KYN28A-12 withdrawable metal-enclosed switchgear for 12 kV distribution networks.
Vacuum circuit breakers
VS1 indoor and ZW32, ZW20, ZW7 outdoor vacuum circuit breakers from 12 kV to 40.5 kV for reliable fault interruption.
Transformadores de potencia
Oil-immersed power transformers from 35 kV to 110-132 kV class for grid, industrial and renewable applications.
Typical Specifications – High Voltage Equipment
| Parámetro | Specification |
|---|---|
| Voltaje nominal | 6 kV – 132 kV class |
| Switchgear standard | IEC 62271 / GB 3906 |
| Transformer standard | IEC 60076 / GB 1094 |
| Frecuencia nominal | 50/60 Hz |
| Enclosure protection | IP54 |
| Control & protection | Relay-based / smart control options |
High Voltage Equipment Manufacturing: One Factory, Full Control
From material preparation to winding, core processing, assembly, electrical equipment integration, inspection and delivery – every step is controlled at our Xuzhou facility, and buyers are welcome to audit the factory before shipment.
Production Workshop
Controlled winding and core processing, assembly and electrical equipment integration with quality checkpoints between every stage.
Quality & Testing Center
Routine inspection on every unit, with type test reports supporting project approval and market certification for each equipment family.
Materials & Components
Core materials, windings, switchgear components and breakers are checked against the approved bill of materials on every production run.
OEM / ODM / Agency Supply
Custom branding, packaging and product variants for global partners – from nameplate to complete equipment design – supported by a dedicated export team.
High Voltage Equipment OEM/ODM & Wholesale Supply for Distributors and EPC Buyers
Private-label or resell high voltage equipment, or consolidate project packages – we provide the factory backing that distributors, wholesalers and EPC buyers need.
OEM / ODM
Factory-Direct
Custom branding, packaging and product variants built on our standard platforms – from a nameplate to full equipment 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 & EPC Support
Channel Partners
Dedicated account management, package engineering and priority production for distributors, integrators and EPC clients.
Account manager · Package design · Priority lead times
Buying High Voltage Equipment: Complete Package vs Separate Suppliers
Splitting a project across several vendors – transformer from one, switchgear from another, breakers from a third – spreads price competition but concentrates coordination risk: interface mismatches, divided responsibility and slower troubleshooting during commissioning.
A single high voltage equipment manufacturer integrates transformer, switchgear and circuit breakers, factory-tests the complete scheme and stands behind the whole package. For most utility, EPC and industrial buyers, that accountability is worth more than the marginal price difference.
High Voltage Electrical Equipment Manufacturers & Suppliers: How to Choose
The high voltage equipment market is led by multinational groups such as ABB, Siemens Energy, Schneider Electric, GE and Toshiba, supported by strong regional manufacturers across Asia, Europe and the Americas. China-based manufacturers increasingly compete on the same technical standards with factory pricing and shorter lead times.
When shortlisting high voltage equipment suppliers, compare certificates and type test reports, inspect factory capacity and test capability, and check reference projects in similar applications. Ask each shortlisted manufacturer to quote the same equipment list – then compare price, lead time and documentation quality on an equal basis.
Subian Electric manufactures high voltage equipment up to 110 kV class – switchgear, ring main units, vacuum circuit breakers, power transformers and substations – from a 50,000m² facility in Xuzhou, China, with 350+ employees and export to 50+ countries. We publish our certificates, supply type test reports on request and welcome factory audits.
Certifications & Quality Assurance
Every unit of high voltage equipment we ship is produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports up to 110 kV class – verifiable evidence of quality and compliance.
Product Certifications
High Voltage Equipment FAQ: Types, Testing & Factory Sourcing
Common questions about high voltage equipment types, testing requirements and how to source from a factory – answered by our engineering and export teams.
¿Qué se considera equipo eléctrico de alta tensión?
What type tests should high voltage equipment pass?
What is the difference between a power transformer and a distribution transformer?
Can you supply a complete high voltage package for a substation project?
What certifications do you hold?
What are your delivery terms and lead times?
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.