GE EPM 5200, EPM 5300, EPM 5350 instruction manual Formulas, Group and Function Number

CHAPTER 10: PROGRAMMING GROUP 1

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:

Primary	x 120V	Primary	x 75V	Primary	x 5A
Secondary		Secondary		Secondary

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 10-2and 10-3contain Full Scale Settings for typical voltages and currents (PT and CT arrangements).

GE Multilin EPM 5000 series Advanced Power Meters 59