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Low Ratio Wound Primary Current Transformer - Model 189

  • Low Ratio Wound Primary Current Transformer
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• 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.
• Secondary Terminals:
Brass studs No. 8-32 UNC with one flatwasher, lockwasher and regular nut.

  • Model Number: Model 189
  • Data Sheet: Date Sheet File
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Product Specification

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). 

Model 189 Low Ratio Wound Primary Current Transformer Features
• Secondary Terminals:
  Brass studs No. 8-32 UNC with one flatwasher, lockwasher and regular nut.

Model 189 Low Ratio Wound Primary Current Transformer Specifications
• 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.

Model 189 Low Ratio Wound Primary Current Transformer Part Number

Part Number
 Current Ratio
 ANSI Metering Class at 60 Hz
B0.1
 B0.2
189-0025
 2.5:5
 0.6
 0.6
189-005
 5:5
 0.6
 0.6
189-0075
 7.5:5
 0.6
 0.6
189-010
 10:5
 0.6
 0.6
189-015
 15:5
 0.6
 0.6
189-020
 20:5
 0.6
 0.6
189-025
 25:5
 0.6
 0.6
189-030
 30:5
 0.6
 0.6
189-040
 40:5
 0.6
 0.6
189-050
 50:5
 0.6
 0.6
189-060
 60:5
 0.6
 0.6
189-075
 75:5
 0.6
 0.6
189-080
 80:5
 0.6
 0.6
189-101
 100:5
 0.6
 0.6

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