Item #: 189
Our Price: $128.50
Current Ratio  
The Model 189 is a low ratio wound primary current transformer suitable for primary currents up to 100 amperes. The Model 189 table lists the most common current ratings. Primary terminals for the Model 189: for ratios of 30:5 and below are, No. 10-32 brass screws with one lockwasher (Dimension A=3.28), for ratios of 40:5 and above, 3/8-16 brass studs with one lockwasher and regular nut (Dimension A=4.10).

Specifications / Catalog Page
Lead Time 20 to 40 days
Application ANSI (Revenue Grade)


  • Secondary Terminals:
    Brass studs No. 8-32 UNC with one flatwasher, lockwasher and regular nut.


  • Continuous Thermal Current Rating Factor:
    1.33 at 30° C amb., 1.0 at 55° C amb.
  • Frequency: 50 - 400 Hz.
  • Insulation Level:
    0.6 kV, BIL 10kV full wave.
  • Approximate weight: 0.75 lbs.
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