POWER MEASUREMENT TECHNOLOGIES INC.
Test and Measurement Instrumentation

Products - Transformer Test Equipment

PMT25000 Series Precision Multi-Ratio Current Transformers

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Reference Current Transformer Picture



PMT25000 Series Precision Current Transformers

Precision two-stage toroidal current transformers find application as the reference in determining the accuracy of instrumentation current transformers.

The better than 50ppm (parts-per-million accuracy) passive operation is further improved by activating an electronic processing circuit that effectively removes core flux caused by voltage induced secondary burden. Electronic burden cancellation improves the accuracy by typically a factor of five.

  • Passive Operation Accuracy @ 0.5VA, 5 - 200% Excitation:
    Ratio: +/-0.005%, Phase: +/-0.3 minutes


  • Electronic Operation Accuracy @ 0.5VA, 5 - 200% Excitation:
    Ratio: +/-0.001%, Phase: +/-0.1 minutes

Primary currents range from 100 to 6000 amperes and with 5 or 1 ampere secondary. Available in Multi-Ratio or Fixed-Ratio configurations.


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43 Riviera Drive Unit #7, Markham, Ontario, Canada L3R 5J6  Tel: 905-944-1551