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What is the measurement accuracy of the Micrologic 5.0P, 6.0P, 7.0P, 5.0H, 6.0H, and 7.0H trip units (including the sensors)?

FA93192

23 January 2021

Product Line
Circuit Breakers

Environment
Applies to the Micrologic Power and Harmonic type trip units (5.0P, 6.0P, 7.0P, 5.0H, 6.0H and 7.0H), and sensors

Resolution
Voltage (V): 0.5%
Current (A): 1.5%, higher accuracy (1%) can be achieved with special calibration on the current transformer (CT characterization option).
Frequency (Hz): 0.1 Hz
Power (W) and Energy (Wh): 2.0%, 1.5% if CT characterization is used

Note: The accuracy of the current measurements depends on both the value displayed (or transmitted) and the circuit breaker rating, where: Accuracy = 0.5 % In + 1.5 % reading
  • Example: For a circuit breaker with a 4000 A rating and a current displayed on Micrologic of 49 A, the accuracy is: 0.5 % x 4000 + 1.5 % x 49 = ±21 A