Ram Meter Inc. 20XSUM-3 5+5+5:5A Summation Current Transformer


The Ram Meter Inc. Model 20XSUM summation current transformers are designed to summarize several synchronous AC currents of equal phase relation with any angle of phase difference. In other words, the 20XSUM summing CT's will summarize the secondary currents of a number of main CT's. The secondary circuits of the main CT's are to be connected to the corresponding marked primary terminals on the 20XSUM summation CT. The number of main CT's to be totaled may range from 2 to 5 (depending on the model) and have a 5A secondary current rating.


  • 20XSUM-3 will total 3 main CT's (5+5+5:5 A)
  • Frequency: 50-400 Hz
  • Insulation Level: 0.6 kV BIL 10 kV full wave
  • ANSI Metering Class : 0.3 B1.8
  • Continuous Thermal Current Rating Factor:
    1.33 at 30°C amb. / 1.0 at 55°C amb.
More Information
Features Summing CT
Manufacturer Ram Meter Inc.
Ratio 5+5+5:5 ACA
Type Current Transformers
Additional Skus 20XSUM-3
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