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Current Transformer–LSY-10 transformer Integrated CT
Current Transformer–LSY-10 transformer Integrated CT
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Current Transformer–LSY-10 transformer Integrated CT

Three-Phase Current Transformer — OEM/ODM & Wholesale Supplier

The LSY-10 three-phase bar-type current transformer integrates three measurement cores in one unit for 10kV power grids, delivering accurate 5A/1A secondary signals for metering and protection. Subian Electric manufactures this integrated CT for switchgear OEMs, utilities and export projects. As a professional manufacturer and factory supplier, Subian Electric welcomes enquiries from distributors, wholesalers and project buyers.

✓ LSY-10 — Integrated Three-Phase Bar-Type CT10kV · 100–1000 A · Class 0.5 / 5P
Integrated 3-Phase
Bar-Type Primary
10 kV Rated

Key Specifications

  • Rated Voltage — 10 kV
  • Primary Current — 100 A – 1000 A options
  • Secondary Current — 5 A or 1 A
  • Accuracy Class — 0.5 / 0.2S; 5P / 10P
  • Rated Burden — 10 VA – 30 VA
  • Insulation — Indoor, suitable for MV switchgear
  • Standards — IEC 60044-1 / IEC 61869
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Product Overview

Integrated Three-Phase Current Transformer from a Leading Chinese Manufacturer

LSY-10 bar-type three-phase current transformer is a simple and compact approach to measure three-phase current in 10kV power system applications. Its use can be seen in switchgear panels, distribution cabinets, and OEM electrical devices. It can be purchased directly from factory in bulk to distributors, wholesalers and project purchasers.

Current Transformer--LSY-10 transformer Integrated CT — Applications & circuit protection applications

Applications & circuit protection

The LSY-10 integrated CT is intended for measuring and controlling three-phase AC circuits used in the 10kV power production field.

  • In MV switchgear: The measurement of currents in panels and incoming lines.
  • At distribution substations: metering and protection for 10kV circuits.
  • In OEM products: Integrated CT is used in packaged switchgear and skids.
  • At industrial plants: monitoring of transformers, motors, and feeders.
Current Transformer--LSY-10 transformer Integrated CT construction and operating reliability

Construction & operating reliability

With its bar-type primary design, this unit provides a straightforward and mechanically sturdy solution, whereas the integrated three-phase feature helps to save the wiring time and installation space as compared to conventional CTs, which require three devices.

  • The primary bar is designed to endure high short-circuit withstand.
  • An integral casing of three phases lessens the time required for installation.
  • Many ratios are available from 100 A to 1,000 A.
  • The secondary output can be set to 5 A or 1 A.
  • The item is designed for indoor installation, 10 kV insulation class.

Technical Parameter

Parameter Value
Rated voltage 10 kV
Rated primary current 100 / 200 / 300 / 400 / 500 / 630 / 800 / 1000 A
Rated secondary current 5 A or 1 A
Accuracy class 0.5, 0.2S (metering); 5P, 10P (protection)
Rated burden 10 / 15 / 20 / 30 VA
Rated frequency 50/60 Hz
Insulation Indoor, 10kV class
Application Three-phase measurement, metering and protection

Instrument Transformer Cost & Quote

Kindly provide your ratio, accuracy class, and quantity to enable a quotation for a Three-Phase Current Transformer by the factory. Volume discounts for switchgear and panel manufacturers are available.

  • Quotation based on specification sheet
  • OEM and Private Label are acceptable.
  • Quick delivery for standard range.

CT Wiring & Secondary Connection

The three-phase current transformer displays clear primary and secondary connections. Always connect the secondary circuit to the relay or measuring device with proper polarity; the secondary circuit must never remain open while hot.

  • P1/P2 and S1/S2 markings as per convention
  • Polarity marking for the proper connection
  • Secondary shorting facilities on request

Compare CT Options

Choose the instrument transformer that fits your scheme:

Feature This CT Alternative
Ratio As specified Other ratios available
Accuracy Per class 0.2 / 0.5 / protection class
Insulation Epoxy cast / oil Indoor or outdoor design
Application Metering / protection Multi-ratio or special duty

Export Markets & Country Compatibility

Instrument transformers are sent around the globe to switchgear manufacturers and distributors, adjusted for the ratio, precision, and specifications of each of its markets.

CT Dimensions, Weight & Packing

The weight and dimensions are based on the aspects of ratio, insulation and fitting type. Devices are made compact enough to be used for panel or cable installation; terminals are protected during transportation. Dimensions drawings come with technical specification.

  • Dimensions compact for panel fitting
  • Protection of terminals during transportation
  • Dimensions drawing per model
Current Transformer--LSY-10 transformer Integrated CT standards and certifications

Standards & certifications

In conformity with IEC 60044-1 / IEC 61869, the LSY-10 integrated current transformer is constructed. All necessary test documentation can be provided to support project approval and certification in the market.

  • Designed in compliance with: IEC 60044-1 / IEC 61869 series.
  • The accuracy levels for the applications of measuring and protective purposes are confirmed.
  • Insulation class meets 10 kV indoor use requirements.
  • The connections are appropriately marked.
Current Transformer--LSY-10 transformer Integrated CT OEM and B2B supply support

OEM & B2B supply support

Subian Electric is an expert in the manufacturing of electric power equipment, supplying it to producers of switchgear and contractors on engineering procurement construction basis concerning the choice of a current transformer, sampling and quoting.

Do you differ in specification or accuracy level? Provide us with primary and secondary currents together with accuracy and quantity to be informed on appropriate configuration by our engineering team.

  • Samples for testing purposes.
  • Flexible batches for your projects and B2B purchases.
  • OEM/ODM solutions for integration of your switchgear.
  • Custom terminals, marking and packaging.
  • Technical documentation.


Request a Quote

Frequently Asked Questions

What does an integrated three-phase CT do?

It allows to measure a three-phase current using a single fixed model and converts them to a proportional secondary signal of 5A or 1A that enables metering and protection devices to work without taking up the panel space.

What ratios are available for the LSY-10?

The primary current ranges from 100A to 1000A and has either 5A or 1A output with a margin of accuracy of 0.5/0.2S or 5P/10P.

Can the LSY-10 be used in existing switchgear?

It is suitable for indoor switchgear with a voltage of 10kV that can be either used in the installation of switchgear or as a replacement of applications that require three-phase current measuring.

Do you support OEM orders?

Yes, both OEM and ODM orders are accepted. Just provide us the ratio, accuracy, burden, quantity and the market for proposals.

Subian Electric Power manufacturing facility in Xuzhou
Manufacturing Base

Current Transformer Production in Xuzhou

Subian's Xuzhou plant produces instrument transformers with coil winding, insulation and ratio test stations. Current transformers are wound, insulated and tested at this facility. In-house production and testing of the Three-Phase Current Transformer follow the same controlled process at this facility. Standard dimensions and terminal arrangements fit existing switchgear and panels. Test results accompany every unit.
  • CT coil winding, insulation and ratio testing in-house
  • Supply for distributors, panel builders and projects
Factory Facilities

CT Winding and Test Areas

The images show the instrument transformer winding area, insulation and assembly stations, and customer inspection activities at Subian's Xuzhou manufacturing facility. The Three-Phase Current Transformer supplied on this page is manufactured, tested and quality-checked at this site. Buyer inspection welcomed. Cores and coils wound to the approved turns.
Subian current transformer production workshop
InsulationInsulation applied per drawing.
CT winding area inside the Subian factory
TestingRatio and accuracy verified.
International customer inspecting a current transformer at the factory
InspectionBuyer inspection welcomed.
Manufacturing Process

Winding, Insulation and Ratio Verification

Current transformer production follows: core selection, primary and secondary winding, insulation application, terminal assembly and ratio/accuracy testing. Manufacturing of the Three-Phase Current Transformer follows the confirmed specification, with checks recorded at each relevant stage. Standard ratings and dimensions make integration straightforward. Metering or protection classes selected for your application.
  • Cores selected and wound to the approved turns ratio
  • Insulation applied and terminals assembled
  • Ratio and accuracy tested on every unit
Subian CT coil winding production line
Send Specification
Subian CT assembly process
Enquiry
Technician carrying out CT winding work
AssemblyTerminals and housings fitted.

Accuracy and Turn Ratio Control

Turn count, polarity and accuracy class are verified on the test bench, and each unit is marked with the confirmed ratio before packing. Yes, we supply CTs to switchgear and panel manufacturers with OEM options. Units follow the relevant IEC/GB instrument transformer standards. Yes, multi-ratio windings can be arranged.
Subian CT core detail
Share ratio, accuracy and quantity.Send ratio and accuracy requirements.
Visitors at the Subian power equipment booth
Subian booth at an international electrical exhibition
Subian team meeting a customer at an electrical exhibition
Customer visiting the Subian transformer booth
Subian international exhibition team
Subian sales representative discussing a project with a visitor
Visitors at the Subian power equipment booth
Subian booth at an international electrical exhibition
Customer Meetings

CT Sourcing Discussions

Our export team discusses current transformer ratios, accuracy classes, burdens and delivery with distributors and panel builders at exhibitions. Accurate measurement for billing and monitoring. Current sensing for relays and protection. Current measurement and protection in panels.
Contact Our Export Team
Product Documentation

CT Certificates and Test Records

Routine test records, type-test reports and certificates for current transformers are available according to model and destination market. For the Three-Phase Current Transformer, certificates, type-test reports and routine test records can be confirmed before ordering. Yes, secondary ratings are configured per requirement. Confirmed with your order based on model and quantity.
Example instrument transformer conformity certificate
Routine test records
Example instrument transformer type test report
Type-test reports
Packed Subian power equipment prepared for delivery
Packing and shipmentCTs are packed with terminals protected and units separated during transport.
Product Range

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Please provide the product type, rated voltage, capacity, quantity, applicable standard, delivery country and required delivery date. We will reply with a quotation or a list of points requiring confirmation.
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  • OEM, ODM and private-label requirements
  • Quantity, packing and delivery planning

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