High Voltage Current Transformer Manufacturers – HV Metering & Protection
Subian Electric manufactures high voltage current transformers for metering and protection in substations and switchgear, from 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 supply HV CTs with correct ratios, accuracy classes and burden, factory-tested and fully documented.
Send your voltage class, ratio and accuracy requirements. Our export team will respond with a quotation and technical data.
Since 2019 · 50,000m² · 350+ Staff
High Voltage Current Transformers We Manufacture
HV current transformers for 10 kV to 35 kV class metering and protection, supplied loose or integrated into switchgear and substation packages.
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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 Is a High Voltage Current Transformer?
A high voltage current transformer measures circuit current at medium voltage levels, feeding proportional signals to protection relays and meters. Its insulation system must withstand the full line voltage.
HV CTs are specified for substations, switchgear and transmission monitoring – with accuracy and saturation performance that decide protection reliability.
- 10-35 kV class – HV CTs for substation and switchgear duty.
- Metering & protection – accuracy classes to 0.2S / 5P20.
- Factory tested – ratio, polarity and insulation verified.
- 50,000m² factory – in-house winding, casting and testing.
- 350+ employees – engineering, quality and export teams.
- OEM / ODM & wholesale – custom branding, packaging and volume supply.
Main Types of High Voltage Current Transformers
We supply two HV CT types:
Metering CT
High-accuracy units for energy measurement and billing.
Protection CT
Saturated-characteristic units for relay protection schemes.
High Voltage Current Transformer Specifications
| Parameter | Specification |
|---|---|
| Rated voltage | 10 kV / 35 kV class |
| Primary current | Per scheme (50 A – 2000 A) |
| Accuracy | 0.2S – 5P20 |
| Insulation | Cast resin / oil immersed |
| Frequency | 50/60 Hz |
| Standard | IEC 61869 |
HV Current Transformer Manufacturing at Our 50,000 m² Factory
From winding to casting, assembly and testing – every HV CT is built and tested at our Xuzhou facility with insulation and ratio verification.
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.
High Voltage Current Transformer Factory Price – Request a Quote
Send your specification, voltage level, capacity and quantity. Our export team will respond with factory pricing, lead time and drawings for approval.
OEM/ODM & Wholesale HV CT Supply
Utilities and panel builders can brand or resell HV CTs 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
Cast Resin vs Oil Immersed HV Current Transformers
Cast resin CTs are maintenance-free and suit indoor and outdoor use without oil handling. Oil-immersed units suit very high voltage classes and harsh environments.
For 10-35 kV duty, cast resin is the practical standard; we confirm the construction with your site.
Choosing a High Voltage Current Transformer Manufacturer
Verify accuracy class test evidence and insulation quality. CT performance directly affects protection and metering accuracy.
Subian Electric offers a 50,000m² factory, 350+ employees, ISO9001, CE and UL certification and export to 50+ countries.
Send your voltage class and ratio requirements – we confirm the design before production.
Certifications & Quality Assurance
Our HV current transformers are produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports.
Product Certifications
High Voltage Current Transformer FAQ
Answers to the questions buyers ask most about high voltage current transformers.
What is a high voltage current transformer?
What accuracy classes are available?
What is the difference between metering and protection CTs?
Can HV CTs be supplied with switchgear?
What testing is done?
What is the minimum order quantity?
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.