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Part Numbers

Part Number Ratio
143-250 25:5
143-300 30:5
143-400 40:5
143-500 50:5
143-600 60:5
143-750 75:5
143-800 80:5
143-101 100:5
143-121 120:5
143-151 150:5
143-201 200:5
143-251 250:5
143-301 300:5
143-401 400:5
143-501 500:5
143-601 600:5
143-751 750:5
143-801 800:5
143-102 1000:5
143-122 1200:5
143-152 1500:5
143-162 1600:5
143-182 1800:5
143-192 1900:5
143-202 2000:5
143-222 2200:5
143-252 2500:5
143-302 3000:5
143-322 3200:5
143-352 3500:5
143-402 4000:5
143-503 5000:5
143-603 6000:5
143-803 8000:5

Toroidal Current Transformer Model 143

Toroidal Current Transformers for relay and metering applications. Available in ratio-to-5 and multi-ratio configurations. Heavy-duty construction with large window for high-current applications. 600V, 10 kV BIL Full Wave, CSA and UL Recognized.

RatioMultiple ratios available
Window Size7.31" Diameter
ApplicationRelay and Metering
Frequency50–400 Hz
Insulation Level600V, 10kV BIL Full Wave
StandardsCSA 66.1-06, CSA 66.2-06, IEEE C57.13, UL 506
WeightApprox. 60 lbs.
  • Available in Ratio to 5 and Multi-Ratio configurations.
  • Terminals are brass studs with one flat washer, one lock washer and one nut each.
  • Mounting bracket kits available.
  • Contact us for complete ratio and configuration options.
Datasheet – Ratio to 5 (PDF) Datasheet – Multi Ratio (PDF)
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