Current Transformer Supplier

Willmall Current Transformer options support project procurement with configurable ratio, rated current, and output form, including split-core designs for retrofit.

3-Phase Digital Meter – Voltage, Current, Frequency, IEC Standard

Three Phase 22mm Digital Panel Meter Voltmeter Ammeter, Voltage Current Frequency Meter, LED Display, DIN Rail/Panel Mount for Industrial Control.

Digital Voltmeter and Current Meter – AC:80-300v, IEC Standard

DIN Rail Voltmeter and Ammeter Panel with LED Display, Built-In Current Transformer, AC 80–300V Voltage Range, 0–99A Measurement.

High Accuracy Mini Split Core Current Transformer for Energy Electricity Meter

High Accuracy Mini Split Core Current Transformer for Energy Electricity Meter, KF Series 5A–1000A, 333mV Output, Clamp-On Hinged Design.

Chk-F Rectangular Residual Current Transformer

CHK-F Rectangular Residual Current Transformer, Low Voltage Core-Through Zero Sequence CT, 63A–2000A, High Sensitivity, Flame-Retardant Epoxy, GB14287.2 Compliant.

CE Arrpove Low Voltage Current Transformer Dx Series

DX Series CE Approved Low Voltage Current Transformer (DX-20/DX-30/DX-40), 0.66kV, Class 1.0, Cable & Busbar CT, DIN Rail or Screw Mount.

High Quality Rct Mr Series Low Voltage Ring Type Electric Current Power Transformer

RCT MR Series Low Voltage Ring Type Current Transformer, 5A–5000A, 0.66kV, Class 0.5/1.0/1.3, 50/60Hz, Panel or Busbar Mount.

0.2s Electricity Current Transformer Manufacturers Oil Filled Current Transformer

0.2S Accuracy Electricity Current Transformer, Oil-Filled Split Core CT for Energy Metering, 0.66kV Low Voltage, Clamp-On Design for RMU & Substations.

Split Core Current Transformer Cts Split Core Current Transformer CT Current Transformer

Split Core Current Transformer (CT), 0.66kV Low Voltage Clamp-On CT for Measurement & Protection, Lightweight Openable Design for RMU, RTU & FTU Systems.

Circular Residual Current Transformer for Electronic Instrument

Circular Residual Current Transformer for Electronic Instruments, 0.66kV Split Core Zero Sequence CT, Clamp-On Design for RMU, RTU & FTU Applications.

Ring Distribution Current Transformer Residual Zero Sequence Current Transformer

Ring Distribution Residual Zero Sequence Current Transformer, Split Core 0.66kV Low Voltage CT, Clamp-On Design for RMU, RTU & FTU Sampling.

Low Voltage AC 0.66kv Residual Current Transformer

Low Voltage AC 0.66kV Residual Current Transformer, Split Core Clamp-On CT, Lightweight Openable Design, Easy Installation for Switchgear and Substations

Low Voltage Residual Leakage Current Transformer Sensor Output 5mA 2mA 0.5mA for Motor Protector Electrical Fire Monitoring Device

Low Voltage Residual Leakage Current Transformer Sensor 0.5mA–5mA Output, Rectangular Core-Through Zero Sequence CT, Flame-Retardant Epoxy, GB14287.2 Compliant.

Wilmall Current Transformer Manufacturer

Willmall provides Current Transformer configurations to support procurement review, including selectable ratio, rated current, and output form for panel and retrofit projects.

Optional transformer ratio, rated current, and output form to align with metering or protection secondary requirements
Temperature-resistant and flame-retardant material specification for installation in electrical enclosures
Safety isolation design characteristic of instrument transformer applications between primary and secondary circuits
Open/split type Current Transformer option for retrofit on energized conductors during uninterrupted power supply upgrades
Documentation-oriented configuration approach intended to facilitate project acceptance and procurement review

What is a Current Transformer?

A Current Transformer is an instrument transformer that converts a primary AC current on a conductor into a scaled secondary current suitable for measurement or protection devices. The secondary circuit is intended for connection to meters, relays, or monitoring inputs based on the selected output form.

How does a Current Transformer ratio relate to the measured current?

Current Transformer ratio defines the relationship between primary current and secondary output. Selection of transformer ratio and rated current is based on expected operating current range and the input specification of the connected device to ensure correct scaling.

Which output form should be selected for meters or protection relays?

Output form selection depends on the secondary input requirement of the meter or relay. Engineering review typically confirms the required secondary signal type and the wiring interface so the Current Transformer output form matches the receiving terminal specification.

How is an open/split type Current Transformer used for retrofit work?

Open/split type Current Transformer designs allow installation around an existing conductor without disconnecting the conductor. Installation practice generally includes verifying conductor routing, ensuring mechanical closure of the split core, and connecting the secondary to the intended measurement or protection circuit.

When should temperature-resistant and flame-retardant construction be specified?

Temperature-resistant and flame-retardant construction is specified when Current Transformer installation occurs inside electrical enclosures or environments where elevated temperature and material performance requirements apply. Specification review typically aligns material characteristics with the project’s cabinet and site conditions.

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Electrical Solutions for Diverse Applications

Our electrical products are designed for reliable power distribution, protection, and control across a wide range of application environments.

Solar & Renewable Energy Systems

Used in photovoltaic systems for power distribution, protection, and stable system operation.

Industrial Manufacturing & Automation

Applied in machinery, control panels, and automation systems to support continuous industrial operation.

Commercial & Residential Buildings

Suitable for building power distribution and protection, meeting safety and installation requirements.

Marine & Offshore Applications

Designed for use in marine and offshore environments with humidity, vibration, and corrosion exposure.

Who We Are

Industrial Electrical Components Manufacturer

WILMALL is a professional electrical equipment manufacturer specializing in industrial and power distribution components for solar energy, automation systems, residential installations, marine applications, and commercial infrastructure.

With 8+ years of industry expertise, we have successfully supported 500+ global clients across 30+ countries and regions, delivering more than 40 categories of electrical products engineered for durability, compliance, and long-term reliability.

We are certified electrical equipment experts.

We collaborate with numerous manufacturing plants in industries such as industrial manufacturing, PLC manufacturing, and new energy.

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Our portfolio includes 40+ product categories, covering cable glands, connectors, transformers, circuit breakers, and industrial control devices for multiple applications.

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WILMALL products are trusted in more than 30 countries and regions, providing factories with consistently high-quality and reliable electrical solutions.

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Why Choose WILMALL

WILMALL for Industrial Electrical Solutions

For distributors, OEMs, and project contractors, supplier selection impacts compliance, delivery timelines, and long-term reliability. WILMALL helps you reduce procurement risk, ensure certification readiness, and maintain stable supply.