MRA: Revenue Grade Split Core Current Transformers (mA Output)


  • High accuracy, 0.5%, (up to 0.2% with compensation)
  • Ideal for use with Elkor Technologies Inc. Power Meters:
  • Current Transformers for the i-Spy AC Current Transducer.
  • Current Transformers for the i-Snail-X AC Current Transducer.

Product Description

High Accuracy (exceeding Revenue Grade), easy to install, ideal for energy mangement applications, as well as accurate metering using Elkor's Power Metering devices.

Unlike the standard 5A CTs, the MRA Current Transformers do not produce high voltage surge when opened . They generate a low energy mA output and no special protection and/or shorting blocks are required. Maximum open secondary voltage is clamped at about 7 V peak.

These CTs are UL listed for easy installation in the field.

Models and Dimensions

** Images not to scale **


  MRA-75 MRA-125 MRA-2x3 MRA-3x5
Primary Wire Window 0.75"
1.29" x 1.69"
2.00" x 3.50"
3.15" x 4.75"
Maximum Continuous Current
(Amps AC)
300A 600A 1500A 2500A
Output @ Max Input (mA AC) 40mA 80mA 200mA 166.67mA
Turns Ratio 7500:1 7500:1 7500:1 15000:1
Insulation Class 600V; 50-60Hz
Overload 2 x Max Input for 5 Seconds
Uncompensated Accuracy (1% - 120%) ± 0.5%
(IEC 60044-1, ANSI C57.13-2008 class 0.5)
Compensated Accuracy (1% - 120%) ± 0.2% (ANSI C12.20 class 0.2)
Phase Shift Less than 0.3°
Leads AWG #22, 6' (1.8m), 600V Terminal Block, includes AWG20 8' (2.4m) leads
Max Open Circuit Voltage Output Clamped at 7Vac peak.
Temperature Range -40°C to 55°C
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