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Low-Voltage Epoxy-Cast Current Transformers for Indoor Use (Window-Type), Current Ratio 800/5A to 4000/5A, Window/Busbar I.D. up to 6.3" / 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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Low-Voltage Current Transformer for Higher Current Ratio and Higher Accuracy - Window Diameter up to 160mm | 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 Low-Voltage Current Transformer for Higher Current Ratio and Higher Accuracy - Window Diameter up to 160mm, 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.


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.

Cast Resin LV Window CT Instrument Transformer, Single/Multi-Ratio up to 4000/5A, Indoor

About the Product

Designed to meet the requirement of a higher current ratio and a higher accuracy, current transformers CR-1S Series have a greater window diameter, which facilitates installation and wiring in a high-current application (with the busbar or multiple insulated wires as the primary conductor). This convenient installation and wiring method decreases the occurrence rate of contact point failure. Multi-ratio models are available upon request (e.g. 4000-2000/5A or 4000-2000-1000/5A). In the multi-ratio models, the burden changes according to its corresponding current ratio, as is stipulated by IEEE and IEC regulations. Insulated with Araldite® epoxy resin, CR-1S Series current transformers are characterized by a pleasing exterior, excellent moisture resistance, and a high level of insulation. 

Specifications

  • Standard: IEEE C57.13 and IEC
  • Indoor Use
  • Frequency: 50 or 60 Hz
  • AC/BIL: 4/- kV
  • Ith = 40 In/1S
  • Burden & Accuracy (IEEE): 0.3 B-0.9
  • Burden & Accuracy (IEC): 30(15)VA/1.0(0.2S) CL.
  • Multi-ratio models and other specifications available.

Selection Table for Low-Voltage Window-Type Current Transformer CR-1S Series

The following table outlines frequently requested specifications for our CR-1S Series Low-Voltage Current Transformer for Higher Current Ratio, Higher Accuracy, Greater Window Diameter; contact us if you require models with alternative standards or specifications tailored to your application.

Model

Current Ratio

Window
Diameter

Approx.
Weight

CR-1S-135

800~4000/5A
Single-Ratio or Multi-Ratio

135 mm

7 kg

CR-1S-160

1600~4000/5A
Single-Ratio or Multi-Ratio

160 mm

5 kg


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