Current Transformer In Switchgear Manufacturers – Integrated CT Supply
Subian Electric manufactures switchgear with integrated current transformers – KYN28A-12 switchgear and XGN15-12 / HXGN15-12 ring main units with CTs for metering and protection. Subian’s 50,000-square-metre factory in Xuzhou, Jiangsu, China, has served utilities in 50+ countries since 2019.
As a factory-direct manufacturer and supplier, Subian provides switchgear with correctly rated, factory-tested current transformers – removing the interface risk of buying CTs separately.
Send your switchgear configuration and CT requirements. Subian’s export team will respond with a quotation and drawings.
Switchgear With Current Transformers Manufactured by Subian
KYN28A-12 withdrawable switchgear and ring main units with integrated current transformers for metering, protection and control, tested per IEC 62271.
What Is a Current Transformer in Switchgear?
A current transformer (CT) in switchgear steps down high circuit current to a safe level for protection relays and metering instruments. Correct rating and accuracy are essential for reliable protection and billing.
CTs are integrated into the switchgear busbars and cable connections during manufacture, so the rating, accuracy class and burden are matched to the protection scheme from day one.
What Buyers Check Before Ordering
- Integrated CTs – metering and protection CTs built into switchgear.
- Correctly rated – ratio, accuracy class and burden matched to your scheme.
- Factory tested – CT polarity and ratio verified with the panel.
- 50,000m² factory – in-house switchgear assembly and testing.
- 350+ employees – engineering, quality and export teams.
- OEM / ODM & wholesale – custom branding, packaging and volume supply.
Main Types of Current Transformers in Switchgear
Subian integrates two CT types into switchgear:
Metering CT
Metering
Accurate class CTs for energy metering and instrumentation.
Class 0.5 or 0.2S / IEC 61869-2
Protection CT
Protection
Class 5P / 10P CTs for relay protection schemes.
5P10 or 5P20 / IEC 61869-2
Switchgear CT Specifications
| Parameter | Specification |
|---|---|
| Voltage | 12 kV / 40.5 kV |
| Ratio | Per protection / metering scheme |
| Accuracy class | 0.2S – 5P20 |
| Frequency | 50/60 Hz |
| Switchgear | KYN28A-12 / XGN15-12 |
| Standard | IEC 62271 / GB 3906 |
How to Compare Current Transformer In Switchgear Suppliers
Quotations for this equipment often look identical on the first page. The difference sits in what is attached behind the number, and in the three or four lines that decide the installed cost rather than the purchase price.
| What to compare | What a thin quotation leaves out | What to ask for |
|---|---|---|
| Enclosure and IP rating | Indoor assumed | IP30 to IP54, and whether the room is dusty or washdown |
| Cable entry | Bottom entry only | Top or bottom entry, gland plate size and the bending radius |
| Busbar material | Copper implied | Copper or aluminium, the cross-section and the plating |
| Metering | A space for a meter | CT ratio, meter class and whether a communication port is required |
| Painting | A colour code | Pre-treatment, primer and topcoat thickness in microns |
| Spares and labels | Nothing beyond the panel | Spare fuses, engraved labels and the schematic set |
Buyers who compare on price alone usually discover the gap at commissioning. The six lines above are the ones that decide whether the unit or the panel can be energised without site work. OEM and ODM supply is available where the nameplate, manual and packing have to carry a different brand.
Current Transformer In Switchgear Standards Buyers Ask For
The purchase specification decides the insulation level, the enclosure test and the nameplate data. These are the standards buyers normally name in the enquiry.
| Standard | What it covers | When it is asked for |
|---|---|---|
| IEC 61439-2 | LV assemblies: design verification and routine test | Any LV panel for IEC markets |
| IEC 62271-200 | MV metal-enclosed switchgear up to 52 kV | RMU and KYN-type panels |
| IEC 62271-100 | High-voltage circuit breakers | Vacuum and SF6 breakers |
| IEC 60529 | Degrees of protection (IP code) | Outdoor and dusty installations |
| IEC 60947-2 | Low-voltage circuit breakers | Device selection inside the panel |
| GB 7251.1 / GB 3906 | Chinese equivalents for LV and MV assemblies | Domestic projects and CNAS reports |
Where two standards conflict, the purchase specification wins and the conflict is recorded on the drawing before production. Type test reports are issued against the model, so ask for the report that names the rating you are buying.
Switchgear With CT Manufacturing at Subian’s 50,000 m² Factory
From busbar assembly to CT mounting, wiring and testing – every panel is built and tested at Subian’s Xuzhou facility with CT polarity verified.
Production Workshop
Controlled winding, core processing and vacuum drying with quality checkpoints between every stage, so quality is built in from the start.
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Quality & Testing Center
Routine inspection on every unit before delivery, with type test reports supporting project approval and market certification.
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Materials & Components
Core materials, windings and components are checked against the approved bill of materials on every production run.
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OEM / ODM / Agency Supply
Custom branding, packaging and configurations for global partners – from nameplate to complete product design – supported by a dedicated export team.
Learn More →OEM/ODM & Wholesale Switchgear CT Supply
Panel builders and distributors can brand or resell switchgear with custom nameplates and documentation.
OEM / ODM
Factory-DirectCustom branding, packaging and product variants built on Subian’s standard platforms – from a nameplate to full product design.
Custom nameplate · Custom packaging · Full test docs
Wholesale Supply
Volume PricingFactory 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 PartnersDedicated account management, technical documentation and priority production for distributors and project clients.
Account manager · Sales material · Priority lead times
Integrated CTs vs Separate CT Purchase
Buying CTs separately risks wrong ratios, polarity errors and installation delays. Integrated CTs are rated, mounted and tested with the panel – one supplier, one test record.
For utilities and panel builders, integrated supply simplifies procurement and commissioning.
Choosing a Current Transformer In Switchgear Manufacturer
Verify the manufacturer’s switchgear test capability and CT rating engineering. Correct CT selection is what makes protection schemes work.
Subian Electric offers a 50,000m² factory, 350+ employees, ISO9001, CE and UL certification and export to 50+ countries.
Send your switchgear configuration and CT requirements – Subian confirms the design before production.
Certifications & Quality Assurance
Subian’s switchgear with CTs is produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports.
Product Certifications
10 kV Dry-Type Transformer Certificate
35 kV Transformer CB Certificate
35 kV Transformer CE Verification
Transformer CE Certificate
Dry-Type Transformer Test Verification
ISO 14001 Environmental Management
ISO 45001 Health & Safety
ISO 9001 Quality Management
110 kV Transformer Type Test Report
UL Certificate of Compliance
Current Transformer In Switchgear FAQ
Common questions about current transformers in switchgear and factory sourcing.
What is a current transformer used for?
What CT ratios and accuracy classes do you supply?
Can CTs be added to existing switchgear?
How is CT polarity verified?
What is the minimum order quantity?
What are your delivery terms?
Can Current Transformer In Switchgear be supplied as a complete package?
What is needed to quote Current Transformer In Switchgear?
Contact Subian
Need the Right Specification?
Tell Subian your target market, product type, quantity and technical requirements. Subian’s team will help you identify a suitable configuration for your project.