Potential Transformer Substation Manufacturers – Metering Grade Supply
Subian Electric manufactures potential transformers for substation metering and protection at our 50,000-square-metre factory in Xuzhou, Jiangsu, China. Our 350+ employees have served utilities and panel builders in 50+ countries since 2019.
As a factory-direct manufacturer and supplier, we provide PTs with accurate ratios, stable accuracy and complete test documentation.
Send your voltage class and accuracy requirements. Our export team will respond with a quotation and technical data.
Since 2019 · 50,000m² · 350+ Staff
Substation Potential Transformers We Manufacture
Potential transformers for substation metering and protection, 10 kV to 35 kV class, cast resin or oil immersed, with routine testing on every unit.
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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 Potential Transformer and Why Is Accuracy Important?
A potential transformer converts substation voltage to a standard low level for instruments. Accuracy matters because every protection decision and every meter reading starts from the PT signal.
A correctly rated PT with the right accuracy class keeps protection sensitive and billing fair. We confirm ratio, class and burden with your scheme before production.
- Metering & protection – accuracy classes from 0.2 to 3P.
- 10-35 kV class – voltage classes for substation duty.
- Stable accuracy – temperature-stable designs for long-term billing.
- 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 Substation Potential Transformers
We manufacture two PT types:
Metering PT
High-accuracy units for energy measurement and billing.
Protection PT
Units for voltage protection and synchronising schemes.
Substation PT Specifications
| Parameter | Specification |
|---|---|
| Rated voltage | 10 kV / 35 kV class |
| Secondary voltage | 100 V / 110 V / 120 V |
| Accuracy class | 0.2 / 0.5 / 3P |
| Insulation | Cast resin / oil immersed |
| Frequency | 50/60 Hz |
| Standard | IEC 61869 |
PT Manufacturing at Our 50,000 m² Factory
From winding to casting, assembly and testing – every PT is built and tested at our Xuzhou facility with accuracy 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.
Substation Potential Transformer Factory Price – Request a Quote
OEM/ODM & Wholesale PT Supply for Panel Builders
Panel builders and distributors can brand or resell PTs 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
Accuracy Class Selection: Metering vs Protection PTs
Metering PTs need high accuracy at normal operating voltage (0.2-0.5 class); protection PTs need predictable behaviour under fault conditions (3P class).
We confirm the accuracy class with your scheme before production, so the PT matches its job.
Choosing a Potential Transformer Substation Manufacturer
Verify accuracy test evidence, insulation quality and reference deliveries to utilities or panel builders.
Subian Electric offers a 50,000m² factory, 350+ employees, ISO9001, CE and UL certification and export to 50+ countries.
Send your voltage class and accuracy requirements – we confirm the design before production.
Certifications & Quality Assurance
Our potential transformers are produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports.
Product Certifications
Potential Transformer Substation FAQ
Common questions about potential transformers for substations and factory sourcing.
What is a potential transformer used for in a substation?
What accuracy class should I choose?
What secondary voltages are available?
Can PTs be supplied as part of a substation package?
What testing is done?
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.