GE EPM 5300 User Manual download pdf (Page 63)

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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:

Vx 120

Secondary

Primary

75Vx

Secondary

Primary

5Ax

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).

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GE EPM 5300 User Manual Page 63

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