MV Epoxy-Cast Current Transformers for Indoor Use (Window-Type) | Elevate Power Distribution: Explore Premium Voltage Transformers | CIC

MV Epoxy-Cast Current Transformers for Indoor Use (Window-Type) / 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.

Featured Products

Epoxy-Cast Window-Type Current Transformers for Indoor Application, 3.6 kV | Enhance Safety and Performance with Superior Epoxy Insulators | CIC

Based in Taiwan since 1974, CHALLENGE INDUSTRIAL CO., LTD. specializes in manufacturing high-quality electrical products, including Epoxy-Cast Window-Type Current Transformers for Indoor Application, 3.6 kV, current transformers, voltage transformers, distribution transformers, epoxy insulators, and power capacitors. With over 45 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 45 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.


Epoxy-Cast Window-Type Current Transformers for Indoor Application, 3.6 kV

CR-3S Series

2-core & single-core models. Indoor window-type current transformers for the main panel or motor control panel of a MV (≦ 3.6 kV) power system. Good for protection and appropriate for measuring and monitoring instruments. Araldite® epoxy resin.

About the Product

Insulated with Araldite® epoxy resin and designed for indoor use, these window-type current transformers are suited for the main panel or motor control panel of a medium-voltage (≦ 3.6 kV) power system. Good for protection and appropriate for measuring and monitoring instruments, these current transformers are available in both 2-core and single-core models. The window-type design facilitates installation and wiring with a busbar or insulated cables, which decreases the occurrence rate of contact point failure. The CR-3S Series current transformers are characterized by a high degree of moisture resistance, as well as superior physical and electrical properties.

Specifications

  • Standards: IEC or IEEE
  • Two-core & single-core models
  • Indoor usage
  • Epoxy cast (Araldite® epoxy resin)
  • Rated Voltage: 3.6 kV
  • Frequency: 50 or 60 Hz
  • AC/BIL: 10/40 kV
  • Other specifications upon request

Selection Table

Other standards and specifications available.

3kV MV Indoor Window-Type Epoxy-Cast Current Transformers (CR-3S Series) Selection Table

* Window diameter varies according to models

Available Models

CR-3S-30, CR-3S-60, CR-3S-70, CR-3S-90, CR-3S-45A, CR-3S-60A, CR-3S-75A, CR-3S-130A, CR-3S-90B , CR-3S-140B


Download Documents

Related Products
  • 3.6 kV Two-Core Epoxy-Cast Current Transformer
    3.6 kV Two-Core Epoxy-Cast Current Transformer
    ER-3C

    Offering a higher rated current ratio, this medium-voltage, two-core current transformer is suited to the main panel or the motor control panel of a 3.6 kV (max.) power system and can be used with measuring or monitoring instruments, or with protective relays. Araldite® epoxy resin.


  • Low-Voltage Current Transformer for Higher Current Ratio and Higher Accuracy - Window Diameter up to 160mm
    Low-Voltage Current Transformer for Higher Current Ratio and Higher Accuracy - Window Diameter up to 160mm
    CR-1S Series

    Low-voltage current transformers of the CR-1S Series, available in multi-ratio or single-ratio models, offer higher current ratios (800-4000/5A), higher accuracy, and larger window diameters (even to 160mm or 6.3”) for convenient installation over high current busbars. These epoxy-resin-cast low-voltage (720 volts / 600 volts, or 0.72 kV / 0.6 kV) current transformers facilitate wiring while decreasing contact failure rates.


  • 3.6 kV / 7.2 kV Current Transformers (1-Core / 2-Core & Single-Ratio / Dual-Ratio Options)
    3.6 kV / 7.2 kV Current Transformers (1-Core / 2-Core & Single-Ratio / Dual-Ratio Options)
    CR-3(6)S-T Series

    Intended for the main panel or the motor control panel of a 3.6/7.2 kV power system and designed to be used with measuring or monitoring instruments, or with protective relays. Each CT has a busbar terminal. Insulated with Araldite® epoxy resin.


  • 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.