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


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

CR-1S Series

For the need of a higher current ratio and accuracy. A greater window diameter facilitates installation and wiring in a high-current application. Multi-ratio models available. Araldite® epoxy.

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.
  • Multi-ratio models and other specifications available.

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

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