CT PT 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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CT PT | 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 CT PT, 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).

  • Coil Molded Single-Phase Voltage Transformers (Potential Transformers), Indoor Use
    Coil Molded Single-Phase Voltage Transformers (Potential Transformers), Indoor Use
    EP-3SF/6SF Series

    Voltage transformers of the EP-3SF/6SF Series are coil-molded, single-phase, indoor-type, medium-voltage, epoxy-resin-insulated potential transformers suitable for power systems of 7.2kV or below. Made with either a laminated core (Model EP-3SF2) or a cut core (EP-3SF5 & EP-6SFK), the voltage transformer has two power fuses attached to the primary side. Specific models from this series can be used as an auxiliary power source for circuit breaker operation — that is, as a control power transformer (CPT), also referred to as a control transformer (CTR), industrial control transformer, or machine tool transformer.

  • Voltage Transformers (Potential Transformers) as Circuit Breaker Operation Power Source
    Voltage Transformers (Potential Transformers) as Circuit Breaker Operation Power Source
    EPF-3SF1, EPF-6SF2

    Voltage transformers EPF-3SF1 and EPF-6SF2 are medium-voltage, indoor-type potential transformers cast in epoxy resin, commonly installed on switchgear (3.3kV or 6.6kV) to serve as an auxiliary power source* for circuit breaker operation. Positioned atop the switch as an operational power source, these transformers can handle relatively high outputs for short durations. Featuring Class-F heat-resistant insulation material for the coils, each voltage transformer is equipped with two power fuses on the primary side to safeguard against overload and short-circuit currents. * Auxiliary power source: In this application, the voltage transformer may also be referred to as a "control power transformer" (CPT), "control transformer" (CTR), "industrial control transformer," or a "machine tool transformer."

  • Three-Phase Grounding Voltage Transformer (GVT), or Grounding Potential Transformer (GPT), for MV Indoor Applications
    Three-Phase Grounding Voltage Transformer (GVT), or Grounding Potential Transformer (GPT), for MV Indoor Applications
    EGP-3DF, EGP-6DF

    This ground voltage transformer (GVT), or ground potential transformer (GPT), is a three-phase medium-voltage (MV) potential transformer for indoor applications. With a fuse for each phase, this PT (VT) features epoxy-insulated coils and a five-legged (five-limbed) laminated core. This voltage transformer is used with measuring or monitoring instruments, or for ground-fault protection.

  • Single-Pole Voltage Transformers (Potential Transformers), or Three-Phase VT (PT) + GVT (GPT)
    Single-Pole Voltage Transformers (Potential Transformers), or Three-Phase VT (PT) + GVT (GPT)
    EPF-10CE, EPF-20SK, EPF-20SL, EPF-20SNE, EPF-20DZE, EPF-30DE

    Single-pole voltage transformers in this indoor medium-voltage range are epoxy-resin-cast potential transformers designed for 12 kV, 24 kV, and 36 kV power systems. These instrument transformers operate with measuring and monitoring instruments for power system analysis and supervision or in conjunction with protective relays to support system safety and reliability. Selected models can be equipped with a primary-side fuse assembly, and certain models offering a rated thermal burden of 1000 VA or higher may also serve as a power source for circuit breaker operation, functioning as control power transformers (CPT), control transformers (CTR), or industrial control transformers in switchgear and machine tool applications.

  • 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."

  • Voltage Transformer (Potential Transformer) for SF6 Gas-Insulated MOF Panel
    Voltage Transformer (Potential Transformer) for SF6 Gas-Insulated MOF Panel
    EPF-20SH

    Intended for power companies, this indoor single-phase epoxy-cast voltage transformer, or potential transformer, is designed to be mounted inside the SF6 gas-insulated MOF (Metering Outfit) panel of a 25.5 kV (max.) power system. With an added tap in the secondary winding, this VT (PT) can offer two voltage ratios (120/60:1).

  • 12 kV & 24 kV Epoxy-Cast Voltage Transformer (Potential Transformer) or Control Power Transformer, as Power Source for Circuit Breaker Operation and Lighting
    12 kV & 24 kV Epoxy-Cast Voltage Transformer (Potential Transformer) or Control Power Transformer, as Power Source for Circuit Breaker Operation and Lighting
    EPF-20DZ

    This voltage transformer, cast with self-extinguishing epoxy resin, is a medium-voltage, indoor-type, single-phase potential transformer for a 12kV or 24kV power system for measuring and monitoring voltage signals. With a continuous output capacity of 4000 VA (max.), it can also serve in a small substation or a switchgear panel as a power source for circuit breaker operation and lighting equipment*. * Power source for circuit breaker operation and lighting equipment: 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.

  • 36 kV Epoxy-Cast Voltage Transformers (Potential Transformers)
    36 kV Epoxy-Cast Voltage Transformers (Potential Transformers)
    EPF-30SA, EPF-30SB

    Indoor-use voltage transformers (potential transformers) for 36 kV (max.) power systems. IEC type testing & environmental testing (-45℃~+65℃). The choice of major corporations of numerous countries. Insulated with Araldite® epoxy resin. Superior moisture resistance.

  • 36 kV Metal-Clad Voltage Transformer (Potential Transformer) for Indoor Application
    36 kV Metal-Clad Voltage Transformer (Potential Transformer) for Indoor Application
    EPF-30SE

    Intended for the switchgear panels of a 36 kV power system, this single-pole epoxy-cast voltage transformer (potential transformer) for indoor application is covered with an aluminum box. The grounded aluminum box for shielding reduces the installation space requirement.

  • Split-Core Current Sensors C06 Series
    Split-Core Current Sensors C06 Series
    C06-05E, C06-10E, C06-15E, C06-20E, C06-25E

    Hinged clip and compact design for easy installation. Current input range: 5 A – 25 A.

  • Split-Core Current Sensors C10 Series
    Split-Core Current Sensors C10 Series
    C10-15E, C10-30E, C10-50E, C10-60E, C10-75E

    Hinged clip and compact design for easy installation. Current input range: 15 A – 75 A.

  • Split-Core Current Sensors C16 Series
    Split-Core Current Sensors C16 Series
    C16-50E, C16-80E, C16-100E, C16-120E, C16-150E

    Hinged clip and compact design for easy installation. Current input range: 50 A – 150 A.

  • Split-Core Current Sensors C24 Series
    Split-Core Current Sensors C24 Series
    C24-100E, C24-150E, C24-200E, C24-250E, C24-300E

    Hinged clip and compact design for easy installation. Current input range: 100 A – 300 A.

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