Solutions for Utility Networks & Power Distribution | Elevate Power Distribution: Explore Premium Voltage Transformers | CIC

Metering, Distribution & Grid Infrastructure | Serving a diverse client base around the world, CIC is a leading manufacturer and supplier of current transformers, potential transformers (voltage transformers), distribution transformers, epoxy insulators, electronic meters, and other electrical and electronic products.

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Power Utility Solutions | Revolutionize Your Energy Systems with Advanced Distribution Transformers | CIC

Based in Taiwan since 1974, CHALLENGE INDUSTRIAL CO., LTD. specializes in manufacturing high-quality electrical products, including Power Utility Solutions, current transformers, voltage transformers, distribution transformers, epoxy insulators, and power capacitors. With over 50 years of expertise and technology collaboration with Germany's MWB, CIC is ISO certified and offers products recognized for reliability in various industrial applications.

Challenge Industrial Co., Ltd. (CIC) stands at the forefront of electrical innovation, specializing in the manufacturing of current transformers, voltage transformers, distribution transformers, epoxy insulators, and power capacitors. With a legacy built on over 50 years of engineering excellence and leveraging advanced German technology, CIC commits to delivering high-quality, ISO-certified electrical solutions. Their comprehensive product range, paired with an ISO-certified approach and a TAF-accredited laboratory, ensures reliability and performance for a diverse global market. CIC is your go-to source for electrical components that power progress and efficiency.

CIC has been offering customers high-capacity power capacitors since 1974, both with advanced technology and 50 years of experiences, CIC ensures each customer's demands are met.

Power Utility Solutions

Metering, Distribution & Grid Infrastructure

Solutions for Utility Networks & Power Distribution
Solutions for Utility Networks & Power Distribution

Instrument transformers, revenue metering transformers, distribution transformers, voltage sensors, current sensors, air-core reactors, bushing current transformers, and distribution automation equipment are essential components in modern electric utility systems. Designed for power generation, transmission, distribution, revenue metering, substation, and smart grid applications, these solutions help utilities improve measurement accuracy, system reliability, network visibility, and operational efficiency.

CIC supplies a broad range of utility products including current transformers (CTs), voltage transformers (VTs/PTs), extended-range current transformers (ERCTs), pole-mounted transformers, pad-mounted transformers, air-core reactors, bushing current transformers, and voltage monitoring sensors for distribution feeder automation systems. Widely used by electric utilities, power companies, and grid operators, these products support reliable power delivery, accurate energy measurement, and long-term network performance.


Explore our featured selections below for this category. Click any product to learn more. For our full range or specific inquiries, please contact us directly.

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  • Bushing Current Transformers for 23 kV C-GIS
    Bushing Current Transformers for 23 kV C-GIS
    EO1M6, EO1M20, EO1M150

    These epoxy-cast multi-ratio bushing current transformers (BCTs, or bushing CTs) are typically installed in 23 kV C-GIS (cubicle-type gas-insulated switchgear) for use with measuring or monitoring instruments, or protective relays.


  • Low-Voltage Current Transformer / Extended Range Current Transformer (ERCT) for Revenue Metering, Window-Type
    Low-Voltage Current Transformer / Extended Range Current Transformer (ERCT) for Revenue Metering, Window-Type
    ROS-A Series

    Extended-Range Current Transformers (ERCT) for Revenue Metering offer precision in billing, with an operating range for accuracy up to 1% ~ 200% of rated current. Our window-type resin-cast current transformers “ROS-A Series” for low-voltage or LV (720 volts / 600 volts, or 0.72 kV / 0.6 kV) applications come in both ERCT and standard varieties. Range of specifications include Metering Class 0.15, Thermal Rating Factor up to 4.0, Current Ratios from 100:5A to 4000:5A, and multiple window diameter options. Special IP65 outdoor edition is available.


  • Low-Voltage Ring-Core Protective-Type Current Transformer for Outdoor Use (Epoxy-Cast)
    Low-Voltage Ring-Core Protective-Type Current Transformer for Outdoor Use (Epoxy-Cast)
    EO1MC20R

    Outdoor, ring-core (window-type) protective (or monitoring) current transformer for power companies or HV power systems. Converting high AC currents into signals to be received by the relay. Cycloaliphatic Epoxy.


  • Low-Voltage Split-Core Protective-Type Current Transformer for Outdoor Use (Epoxy-Cast)
    Low-Voltage Split-Core Protective-Type Current Transformer for Outdoor Use (Epoxy-Cast)
    EO1MD20

    Window-type (split-core), outdoor, protective (or monitoring) current transformer for power companies or HV power systems. Converting high AC currents into signals to be received by the relay. Cycloaliphatic Epoxy.


  • Dry-Type Bushing Current Transformers for GIS or Power Transformers
    Dry-Type Bushing Current Transformers for GIS or Power Transformers
    TB-1M Series

    Suited to power transmission and distribution systems and intended to work with measuring or monitoring instruments, or with protective relays, these bushing CTs (BCTs) can also be used with GIS or in conjunction with power transformers bushings. Insulation tape or epoxy resin as insulation material.


  • Outdoor-Type Current Transformers / Extended Range Current Transformers (ERCTs) for Revenue Metering (12~36 kV)
    Outdoor-Type Current Transformers / Extended Range Current Transformers (ERCTs) for Revenue Metering (12~36 kV)
    AWF-12, AWF-24, AWF-36

    These outdoor current transformers for revenue metering, intended for 12~36 kV power systems, are used as part of an MOF (Metering Outfit) or for current monitoring. Insulated with UV-resistant cycloaliphatic epoxy resin, these medium-voltage (MV) current transformers are ideal for outdoor use and can be available as Extended Range Current Transformers (ERCTs) when requested.


  • 12 kV & 24 kV Epoxy-Cast Voltage Transformers (Potential Transformers) for Indoor Use
    12 kV & 24 kV Epoxy-Cast Voltage Transformers (Potential Transformers) for Indoor Use
    EPF-20SI, EPF-20SN

    Voltage transformers EPF-20SI and EPF-20SN are potential transformers for 12 / 24 kV power systems. These voltage transformers are cast in epoxy resin and designed for indoor applications, offering stable electrical characteristics and compliance with IEC or IEEE standards. Flexible configurations are available to meet different system requirements.


  • Conductive Shield Voltage Transformer (Potential Transformer) for 24 kV 4-Way Switchgear (Also Operation Power Source)
    Conductive Shield Voltage Transformer (Potential Transformer) for 24 kV 4-Way Switchgear (Also Operation Power Source)
    EPF-20FB

    This voltage transformer is a single-phase, epoxy-resin-cast medium-voltage potential transformer designed to also function as an operation power source*, specifically paired with 24kV 4-Way Switchgear. It features a high-voltage elbow-type connector on the primary side and includes an internal high-voltage power fuse for protection. The exterior of the voltage transformer is coated with a conductive metal mixture for shielding, and waterproof treatment can be requested for the secondary side. The voltage transformer has a rated burden and accuracy of 600 VA / 3.0 CL.* Operation power source: In this application, the voltage transformer can also be referred to as a "control power transformer" (CPT), "control transformer" (CTR), "industrial control transformer," or a "machine tool transformer."


  • Outdoor-Type Voltage Transformers (Potential Transformers) for Revenue Metering
    Outdoor-Type Voltage Transformers (Potential Transformers) for Revenue Metering
    VPF Series

    Outdoor voltage transformers in the VPF Series are medium-voltage (MV) potential transformers designed for revenue metering applications. As part of a Metering Outfit (MOF), these 15.5–36.5 kV instrument transformers are cast in Araldite® UV-resistant cycloaliphatic epoxy resin and are suitable for long-term outdoor service in harsh environments, including solar ultraviolet radiation, salt fog, high temperature, and high humidity.


  • Pole-Mounted Transformers
    Pole-Mounted Transformers
    Pole-Mounted Transformer Series

    Made with premium-grade copper wire and insulation oil, these pole-mounted transformers can be specially designed or configured to meet the requirements of power companies in most countries. Every effort is made to ensure customer satisfaction.


  • Pad-Mounted Transformers
    Pad-Mounted Transformers
    OSA Series (Padmount)

    CIC Pad-Mounted Transformers have been used by the Taiwan Power Company for over 25 years. These products, well-received in numerous countries, are type-tested by CIC's internationally-accredited testing laboratory.


  • Air Core Reactors
    Air Core Reactors

    These MV air-core reactors are single-phase dry-type series reactors which are mainly used together with 12 kV or 24 kV capacitor banks in electrical substations of utility companies. The insulation shell of the product is molded in epoxy resin. To reduce core loss and noise, this type of self-cooling detuned reactor utilizes the air-core design and construction. Besides having excellent insulation and moisture resistance, these air-core reactors can withstand large short-circuit current, are easy to maintain, and offer great durability.


  • Voltage Monitoring Sensor for Distribution Feeder Automation System (Indoor Type, for Underground Distribution Networks)
    Voltage Monitoring Sensor for Distribution Feeder Automation System (Indoor Type, for Underground Distribution Networks)
    UV-5607

    Voltage Monitoring Sensor “Type UV-5607” is designed for distribution feeder automation systems implemented for underground distribution networks.This voltage monitoring sensor can be used in a 25.5 kV (max.) underground distribution network using distribution feeder automation system. This indoor-type voltage monitor, installed at underground cables in such a system, helps to provide voltage signals and data for monitoring and analysis purposes.


  • Voltage Monitoring Sensor for Distribution Feeder Automation System (Outdoor Type, Pole-Mounted in Overhead Systems)
    Voltage Monitoring Sensor for Distribution Feeder Automation System (Outdoor Type, Pole-Mounted in Overhead Systems)
    EDIO-F

    Voltage Monitoring Sensor “Type EDIO-F” is designed for distribution feeder automation systems implemented for overhead distribution networks.This voltage monitoring sensor can be used in a 25.5 kV (max.) overhead distribution network using distribution feeder automation system. This outdoor-type voltage monitor, to be pole-mounted in overhead systems, helps to provide voltage signals and data for monitoring and analysis purposes.



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