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Appendix B – INFORMA PMD-A Functions
The following calculations are possible for 3U+3I-delta cabling.
Voltage
Current
U
Calculation
rms (1/2)
10 seconds
10/12 cycle
calculation
U
Calculation
rms (1/2)
10/12 cycle
calculation
U
Calculation RMS
rms (1/2)
Parameters
minutes)-Pst
Frequency (10 minutes)
Signaling Voltages (3)
Crest Factor
Under and Over Deviation
RMS
Parameters
Frequency
RMS
Zero Sequence
Positive Sequence
Negative Sequence
Unbalance and Zero Unbalance
Harmonics (up to 50th order)
Inter-harmonics (up to 50th
order)
THD(THD, THD Odd, THD
Even)
Flicker instantaneous(Pinst)
Flicker short term (10 minutes)-
Pst
Frequency (10 minutes)
Signaling Voltages (3)
Under and Over Deviation
RMS
Zero Sequence
Positive Sequence
Negative Sequence
Unbalance and Zero Unbalance
RMS
Harmonic (up to
50th order)
Inter-harmonics
TDD
k-Factor
177
Total Nos.
1
3
3
6
3
366
Total Nos.
1
3
1
1
1
2
150
147
9
32
3
1
3
6
3
1
1
1
2
3
150
147
3
3
3
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