GE EPM 5200 - Manual (Page 63)

CHAPTER 10: PROGRAMMING GROUP 1
GE Multilin EPM 5000 series Advanced Power Meters 59
CHAPTER 10
PROGRAMMING GROUP 1 – VOLTAGE, AMP AND WATT SCALE
SETTINGS
NOTE: The EPM 5300P and 5200P full scales will already be programmed if the order specified current
and voltage transformer ratios. The meter label indicates any full scale setup.
Programming Group 1 contains voltage, amperage and full scale power selection, along with scale factor
selection and decimal point placement.
The user can re-scale without removing the EPM 5300P for calibration. The 5300P has been calibrated at
standard levels in GROUP 2. Mathematically convert any full scale ratios to those calibrated levels. If a
different current or voltage transformer is used, program the primary value of its ratio. If necessary,
convert the ratio to a secondary value of five amps standard current (1 amp is a special order) and 120V
or 75V nominal voltage (options L only).
FORMULAS:
V x 120
Secondary
Primary
75V x
Secondary
Primary
5A x
Secondary
Primary
It may be necessary to convert the full scale to a larger unit. There is a resolution limitation for all full
scales of 2000. If a display reading exceeds 2000, it may be unstable and subject to zeroing problems.
Example: The full scale for a CT ratio of 3000/5 should be 03.00 kA.
When changing a PT or CT full scale, calculate the new watts full scale and make any necessary
changes. The watts full scale will not auto range.
10.1: Group 1, Function 0—Full Scale Voltage Settings, Scale & Decimal Point
Placement
GROUP AND FUNCTION NUMBER FUNCTION
10. Full Scale Selection for Volts
11. Full Scale Selection for Amps
12. Full Scale Selection for Watts
1E. Exit Programming GROUP 1
Table 10-1: Group 1 Programming Format
NOTE: Tables 10-2 and 10-3 contain Full Scale Settings for typical voltages and currents
(PT and CT arrangements).