Electrical Transformers Searched | Enhance Safety and Performance with Superior Epoxy Insulators | CIC

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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Based in Taiwan since 1974, CHALLENGE INDUSTRIAL CO., LTD. specializes in manufacturing high-quality electrical products, including Electrical Transformers, 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.

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  • 24 kV Two-Core Current Transformer (for Polluted Regions)
    24 kV Two-Core Current Transformer (for Polluted Regions)
    EWF-20DK

    2-core current transformer for a 20~24kV power system. Used in conjunction with measuring or monitoring instruments, and with protective relays. Epoxy cast. Designed to have greater creepage, it is appropriate for polluted regions.

  • Multi-Ratio Current Transformers (Single-Core & Two-Core Options) for 25 kV max. Power Systems
    Multi-Ratio Current Transformers (Single-Core & Two-Core Options) for 25 kV max. Power Systems
    CR-20S Series

    Current transformers for installation in a switchgear panel of a 25kV (max.) power system and to be used with measuring or monitoring instruments, or protective relays. These are economic models suited to locations of high humidity or moderate pollution. The insulation material for the core and the secondary coil is Araldite® epoxy resin.

  • Bushing Current Transformers for Draw-Out Circuit Breakers
    Bushing Current Transformers for Draw-Out Circuit Breakers
    HCB-2415(A), EBF-25M Series

    Multi-ratio bushing current transformers (bushing CTs, or BCTs) designed for 24kV draw-out circuit breakers and to be used with measuring (or monitoring) instruments or protective relays. IEEE 0.3 B-0.9. Cast in Araldite® epoxy.

  • 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.

  • 36 kV Multi-Ratio Current Transformers (Indoor Use)
    36 kV Multi-Ratio Current Transformers (Indoor Use)
    EWF-30D Series

    Suited to ≤ 36kV power systems, these multi-ratio current transformers are available in 2-core and 3-core options. Insulated with Araldite® epoxy and intended to work with measuring or monitoring instruments, or with protective relays.

  • High-Voltage (HV) Outdoor Current Transformer, 52 kV & 72.5 kV
    High-Voltage (HV) Outdoor Current Transformer, 52 kV & 72.5 kV
    AWF-52, AWF-72

    These high-voltage current transformers (52 kV or 72.5 kV), designed for outdoor use, are available in single-core and two-core varieties. Featuring extended creepage distance and insulated with UV-resistant cycloaliphatic epoxy resin, these current transformers can withstand solar ultraviolet radiation and IEC-defined pollution level III (“Heavy”). They’re especially ideal for regions with salt fog, high temperature, and high humidity.

  • Control Power Transformers / Low-Voltage (LV) Voltage Transformers (Potential Transformers)
    Control Power Transformers / Low-Voltage (LV) Voltage Transformers (Potential Transformers)
    CPT Series

    These low-voltage control transformers, resin-insulated for Class A or Class F insulation, are economical while conforming to UL safety requirements and regulations. Highly resistant to moisture, heat and dust, these control power transformers are suitable for use at highly polluted locations. Some models of this versatile series can be used as voltage transformers (potential transformers) with Class 0.5 or Class 1.0 accuracy according to IEC’s standard for voltage transformers.

  • Low-Voltage Dry-Type Control Transformers
    Low-Voltage Dry-Type Control Transformers
    S Series

    These low-voltage control power transformers, with Class A or Class H insulation, are economical products suitable for use with machine tools or industrial equipment at indoor locations with lower humidity. Also referred to as "control transformers" (CTR), "industrial control transformers," or "machine tool transformers," these control power transformers (CPT) can also be installed in low-voltage main panels or motor control panels as an auxiliary power source. This dry-type transformer is compact and easy to install.

  • Low-Voltage Dry-Type Control Transformers (With Optional Enclosures)
    Low-Voltage Dry-Type Control Transformers (With Optional Enclosures)
    DSH Series

    DSH Series low-voltage control transformers are compact, economical, and suitable for use with machine tools or industrial equipment. This product is often referred to as an "industrial control transformer," "machine tool transformer," "control power transformer" (CPT), or "control transformer" (CTR).

  • 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.

  • Low-Voltage Oil-Immersed Transformers
    Low-Voltage Oil-Immersed Transformers
    LV Oil Transformer Series

    For high efficiency and safety, CIC’s low-voltage oil-immersed transformers are made with high-permeability silicon steel cores and insulating oil of a high ignition point.

  • Medium-Voltage Oil-Immersed Transformers
    Medium-Voltage Oil-Immersed Transformers
    MV Oil Transformer Series

    CIC’s medium-voltage oil-immersed transformers, characterized by high efficiency and safety, are made with high-permeability silicon steel cores, and insulating oil of a high ignition point.

  • Non-Ventilated Resin-Encapsulated Transformers (H-Class Insulation)
    Non-Ventilated Resin-Encapsulated Transformers (H-Class Insulation)
    ET Series

    Non-Ventilated Resin-Encapsulated Transformers (with H-Class insulation) are characterized by a reduced noise level compared to ordinary dry-type or cast-resin transformers. Compact and installable in a number of different ways, these transformers are furthermore self-extinguishing. With a durable IP20 enclosure, these transformers come in Regular Type and "Silent" Type, for the lowest sound levels. Optional accessories include protective devices for overload and over-temperature protection. SPD for protection against lightning is also available.

  • LV Cast Resin Dry Type Transformers (CRT)
    LV Cast Resin Dry Type Transformers (CRT)

    Self-extinguishing low-voltage dry-type transformers, with coils cast in epoxy resin, for moisture-prone and polluted environments. Cores made with cold-rolled grain-oriented silicon steel sheets. Optional protective enclosures available for outdoor applications.

  • MV Cast Resin Dry Type Transformers (CRT)
    MV Cast Resin Dry Type Transformers (CRT)

    Self-extinguishing medium-voltage dry-type transformers, with coils cast in epoxy resin, for moisture-prone and polluted environments. Cores made with cold-rolled grain-oriented silicon steel sheets. Optional protective enclosures available for outdoor applications.

  • Low-Voltage Dry-Type Transformers
    Low-Voltage Dry-Type Transformers
    DTH Series

    LV Dry-Type Transformers, made with high-permeability cold-rolled grain-oriented silicon steel sheets (CRGO) and H-Class insulating materials, are self-extinguishing and characterized by excellent dissipation of heat, high efficiency, low noise, easy installation, and low maintenance.

  • 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.

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