Low-Voltage Epoxy-Cast Current Transformers for Indoor Use (Window-Type )

Low-Voltage Current Transformers (0.72 kV max.)

CR-1S SERIES

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: 50/60 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.

Selection Table

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

 
 

Downloadables

Low-Voltage Epoxy-Cast Current Transformers for Indoor Use (Window-Type), CR-1S Series

Easy-to-print document, containing product description, specifications, and a comparison table.

CT & PT Selection Guide: How to Choose a Current Transformer or Potential Transformer

How to select, based on application and power system attributes, the primary and secondary currents, burden, accuracy, rated frequency, type (indoor vs. outdoor), insulation material, etc.