7202A, 7203A Precision Current Transformers

  • Precision CT calibration reference standard, replaces MI Model 7020
  • Currents to 10,000 A
  • Portable: carrying handle for smaller CTs; wheels on heavier CTs
  • Passive or electronically-aided compensation
  • Large division ratio (switchable from 1000:1 to 2000:1, lower on smaller CTs)
  • Accuracy:
    • Magnitude: < 0.0015%
    • Phase: < 0.0015%
Features & Benefits

The 72XX Series of precision current transformers embodies MI’s longstanding commitment to excellence in precision measurement. Designed for accurate current measurement and power grid monitoring, these transformers are engineered to meet rigorous technical standards and design practices, ensuring safe, reliable performance across critical electrical applications.

Feature Benefit
Wide input current range Extremely high linearity allows to cover a wide range of primary current values with the same CT.
Two-stage current comparator technology Units with comparator output can be used either as Precision CT or as a Current Comparator in more complex systems
Current division accuracy down to 15 parts in 106 Satisfies most laboratory requirements for scaling down AC currents.
Negligible long-term drift Permits users to extend the calibration period, and have confidence in measurements for 3-5 years.
Electronically Aided Output with Compensated Input The 7201ACT has multi-ratio compensated input for easy cascading,  achieving an overall division ratio of up to 1,000,000 to 1.
Specifications

 

AC Current Transformer 7200ACC 7201ACT 7202A 7203A
Type Passive two-stage    compensated current transformer/comparator Electronically-aided current transformer (multiple ratios) Multiple-ratio standard current transformer Multiple-ratio standard current transformer
Compensated CT Passive Active Passive Passive
Maximum Primary Current (A) 2000 A 100 A (through window) 100 A | 10 A 5000 A (10,000 A on 2000:1)
Input Connection  2″ (51mm) window 1″ (25.5mm) window with 5-pin circular connector TWECO connector, binding posts 6″ (153mm) window
Output Connection Binding post and locking connector 5-pin circular connector 5-pin circular connector 5-pin circular connector
Maximum Burden (Ω) 1 1 1 1
Ratio Error (parts per 106) ± 15 ± 15 ± 15 ± 15
Phase Error (parts per 106) ± 15 ± 15 ± 15 ± 15
Notes Portable (carrying case) Battery operated. Portable (carrying case) On wheels On wheels
Test Frequency Range 40 Hz – 400 Hz 40 Hz – 400 Hz 40 Hz – 400 Hz 40 Hz – 400 Hz

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