CHAPTER 8

PROGRAMMING GROUP 1

8.1SCALE SELECTIONS AND FULL SCALE SETTINGS

Programming GROUP 1 functions provide a selection of Full Scale Settings to accommodate the different CT’s and PT’s. The decimal point may be positioned for maximum resolution. The user can perform Scale Selection in each function. The site technician has a choice of Full Scale selection between volts and kilovolts or amps and kiloamps.

NOTE: DUE TO THE RESOLUTION CAPABILITY, READINGS OVER 2000 COUNTS RESULT IN A LESS STABLE MEASUREMENT.

ÖTables 8-0and 8-1contain Full Scale settings for typical voltages and currents (PT and CT arrangements):

TABLE 8-0

INPUT VOLTAGE

PT RATIO

FULL SCALE

120/208V

1:1 (DIRECT)

120V

120/208V

4:1

480V

120/208V

12:1

1.44KV

277/480V (SUFFIX G)

1:1 (DIRECT)

300V

TABLE 8-1

INPUT CURRENT

 

CT TYPE

 

FULL SCALE

0 - 5A

 

NONE

 

5.00A

0 - 1000A

1000/5

 

1000A

0 - 5000 A

5000/5

 

5.00KA

TABLE 8-2: GROUP 1 PROGRAMMING FORMAT

 

FUNCTION NUMBER

 

FUNCTION

 

0.

 

Full Scale Selection for Volts

1.

 

Full Scale Selection for Amps

E.

 

Exit Programming GROUP 1

8.2GROUP 1, FUNCTIONS 0-1: FULL SCALE SETTINGS, VOLT & AMP CHANNELS, VOLT & AMP DECIMAL PLACEMENT

ÖTo change the VOLT OR AMP FULL SCALE settings (Function 0 and 1, respectively), follow these steps:

NOTE: PRESS MAX/MIN/LIMITS, AT ANY TIME, TO CANCEL BEFORE STORING THE LAST DIGIT OR SWITCH.

AC VOLTS

I. AI BI CI AI BI CI

N N N B C A

AC AMPS

A B C N

MAX MIN

 

LM1 LM2

 

 

 

 

 

 

 

AC VOLTS

 

 

 

 

I0.

A B C A B C

 

 

 

 

 

I I I I I I

 

 

 

 

 

N N N B C A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I20

AC AMPS

 

 

 

 

 

 

 

A B C N

 

 

 

 

 

 

 

 

 

 

 

MAX MIN

 

LM1 LM2

 

 

 

 

 

 

 

 

 

 

 

MAX/MIN PRINT LIMITS PROG

VOLTS AMPS

PHASE NEXT

MAX/MIN

PRINT

LIMITS

PROG

VOLTS

AMPS

PHASE

NEXT

Step 1:

a.Enter Group Level of Programming Mode, (see Chapter 6).

b.Press MAX/MIN/LIMITS until 1. appears in upper display.

c.Press VOLTS to activate the Group.

Step 2:

Ö10. appears in upper display.

ÖLower display indicates Full Scale setting.

ÖA segment appears in upper display.

ÖUP signifies - Kilovolts.

ÖDOWN signifies - Volts.

a.Press VOLTS to begin Data Entry Sequence.

29

GE Industrial Systems

Page 34
Image 34
GE EPM 3000P instruction manual Programming Group, Input Voltage PT Ratio Full Scale, Input Current CT Type Full Scale

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