Calculations
(continued)
Description
Abbreviation
Wiring Configuration
Formula
Units
Precision
Amps RMS
Derived from
200mS (10/12
cycles 50/60 Hz)
Aggregated to
selected interval
Irms-a
Irms-b
Irms-c
Irms-d
Any
where n=512 samples
Amps +/- 0.1% of
Reading
+/- 0.05%
of FS
9 KHz BW
Amp ½ cycle slide
Cyclic RMS of full
cycle restarted
every ½ cycle
Icyc-a
Icyc-b
Icyc-c
Icyc-d
Any
where n=512 samples
Amps +/- 0.1% of
Reading
+/- 0.1% of
FS
9 KHz BW
Amps DC
Derived from
200mS (10/12
cycles 50/60 Hz)
Aggregated to
selected interval.
Idc-a
Idc-b
Idc-c
Idc-d
Any
where n=512 samples
Amps +/- 0.2% of
Reading
+/- 0.1% of
FS
RMS Deviation
Subtraction of 1
cycle RMS from
adjacent cycles.
Used for cyclic
waveshape
transient trigger
system.
Icycw-a
Icycw-b
Icycw-c
Icycw-d
Single phase
Split phase
Wye
Irms(cycle 1) -
Irms(cycle 2)
Amps +/- 0.2% of
Reading
+/- 0.1% of
FS
9 KHz BW
Maximum
magnitude value of
Crest.
Largest Absolute
magnitude of
samples in a ½
cycle. Used for
cyclic waveshape
transient trigger
system.
Ipk-a
Ipk-b
Ipk-c
Ipk-d
Single phase
Split phase
Wye
Largest Absolute
magnitude of 256
samples (1/2 cycle)
Amps +/- 0.2% of
Reading
+/- 0.1% of
FS
DC of individual
Cycle
Icycdc-a
Icycdc-b
Icycdc-c
Icycdc-d
Any
where n=512 samples
Amps +/- 0.2% of
Reading
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