D-500L Firmware V-5.8
K35D03-EN - 18 -
Measurement method:
True RMS
Sampling rate:
8000 Hz
Harmonic analysis:
up to 31th harmonic
Supported topologies:
3 ph 3 CTs
3 ph 2 CTs L1-L2
3 ph 2 CTs L1-L3
2 ph 2 CTs L1-L2
2 ph 2 CTs L1-L3
1 ph 1 CT
CT secondary rating:
5A
Measurement range:
5/5 to 5000/5A minimum
Input impedance:
15 mili-ohms
Burden:
0.375W
Maximum continuous
current:
6A
Measurement range:
0.1 to 7.5A
Common mode offset:
Max 5VAC between BAT- and any CT terminal.
Display resolution:
1A
Accuracy:
0.5% + 1 digit @
5A (± 4.5A @ 5/500A full range)
SELECTING THE CT RATING AND CABLE SECTION:
The load on a CT should be kept
minimum in order to minimize phase shift
effect of the current transformer. Phase
shift in a CT will cause erroneous power
and power factor readings, although amp
readings are correct.
Datakom advises CT rating to be selected
following this table for the best
measurement accuracy.
SELECTING THE CT ACCURACY CLASS:
The CT accuracy class should be selected in accordance with the required measurement precision. The
accuracy class of the Datakom controller is 0.5%. Thus 0.5% class CTs are advised for the best result.
3.3. AC CURRENT INPUTS
