Appendix B – INFORMA PMD-A Functions
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Figure B.4 – Unbalance Record
Voltage unbalance is displayed as 100% because all phases are In-phase.
Note
The maximum voltage unbalance displayed is 100%.
Harmonics
Harmonics are systematic distortions of the waveform resulting from the super imposition of
secondary signals having frequencies of a multiple of the fundamental frequency.
The power quality recording function in the INFORMA PMD-A provides a comprehensive
harmonic recording function comply with IEC 61000-4-7. The user can select up to the 50th
harmonic quantity for each three-phase group of analog channels to be recorded at 10-
minute intervals and/or user-defined time intervals.
The conditions in which the harmonics, inter-harmonics, and THD parameters are forced to
zero are:
•
When applied voltage (fundamental) is zero.
•
When applied voltage (fundamental) is less than 10% of nominal voltage.
Summary of Contents for INFORMA PMD-A
Page 1: ...User Manual www qualitrolcorp com INFORMA PMD A Data Acquisition Unit Document ID 40 08557 01...
Page 7: ...Contents Contents iv www qualitrolcorp com References 240...
Page 8: ...About This Manual 1 www qualitrolcorp com Chapter 1 About This Manual...
Page 12: ...Overview 5 www qualitrolcorp com Chapter 2 Overview...
Page 15: ...Components and Specifications 8 www qualitrolcorp com Chapter 3 Components and Specifications...
Page 58: ...Installation 51 www qualitrolcorp com Chapter 4 Installation...
Page 86: ...Configuration 79 www qualitrolcorp com Chapter 6 Configuration...
Page 108: ...Configuration 101 www qualitrolcorp com Figure 6 22 PQ Free Interval Continuous Recording...
Page 120: ...Maintenance 113 www qualitrolcorp com Chapter 7 Maintenance...
Page 126: ...Maintenance 119 www qualitrolcorp com Figure 7 7 Voltage Calibration...
Page 166: ...Appendix B INFORMA PMD A Functions 159 www qualitrolcorp com Figure B 9 RMS Envelope PQRVC...
Page 199: ...Appendix D License Information 192 www qualitrolcorp com Appendix D License Information...
Page 246: ...References 239 www qualitrolcorp com References...