Chapter 11 Phase Reversal & Phase Imbalance Set Limits/Relays
11.4 GROUP 7, FUNCTION 1: PERCENTAGE VOLTAGE PHASE IMBALANCE
ÖTo change PERCENTAGE VOLTAGE PHASE IMBALANCE, follow these steps:
NOTE: PRESS MAX/MIN/LIMITS, AT ANY TIME, TO CANCEL BEFORE STORING THE LAST DIGIT OR SWITCH.
MAX
AC VOLTS
A B C N
AC AMPS
MAX/MIN
LIMITS VOLTS
PRINT
PROG
PHASE
NEXT
7.
AMPS
B C A
I I I
A B C
N N N
I I I
A B C
LM2
LM1MIN
MAX
AC VOLTS
A B C N
AC AMPS
MAX/MIN
LIMITS VOLTS
PRINT
PROG
PHASE
NEXT
7 I.
AMPS
B C A
I I I
A B C
N N N
I I I
A B C
LM2
LM1MIN
_
_
Step 1:
a. Enter Group Level of Programming Mode,
(see Chapter 2)
b. Press MAX/MIN/LIMITS until 7. appears in
upper display.
c. Press VOLTS to activate the Group.
a. Press MAX/MIN/LIMITS until 71. appears in upper
display.
ÖLower display indicates the current Percentage Voltage
Phase Imbalance.
MAX
AC VOLTS
A B C N
AC AMPS
MAX/MIN
LIMITS VOLTS
PRINT
PROG
PHASE
NEXT
7 I
AMPS
B C A
I I I
A B C
N N N
I I I
A B C
LM2
LM1MIN
_
_
MAX
AC VOLTS
A B C N
AC AMPS
MAX/MIN
LIMITS VOLTS
PRINT
PROG
PHASE
NEXT
7 I
AMPS
B C A
I I I
A B C
N N N
I I I
A B C
LM2
LM1MIN
__
.I
Step 3:
a. Press VOLTS once.
b. Press PRINT/PROG to change current Set
Above/Below, Trip Relay 1, and Trip Relay 2 settings.
Ö This toggles the segments UP (above limit) or DOWN
(below limit).
c. Press VOLTS to store.
Step 4:
a. Press VOLTS to activate the Percentage Voltage
Phase Imbalance.
b. Press PRINT/PROG to scroll through the digits.
• Press PRINT/PROG once and the blank signifies a
zero.
• Press PRINT/PROG twice and 1 appears.
c. Press VOLTS to store.
NOTE: PRESS PHASE/NEXT TO TOGGLE BETWEEN
NUMBERS AND SEGMENTS. IF A NUMBER GREATER THAN 5 IS
ENTERED, THE METER DEFAULTS TO 5.
MAX
AC VOLTS
A B C N
AC AMPS
MAX/MIN
LIMITS VOLTS
PRINT
PROG
PHASE
NEXT
7 I.
AMPS
B C A
I I I
A B C
N N N
I I I
A B C
LM2
LM1MIN
I0.0
Ö Lower display indicates the new setting.
See Chapter 12 to Exit.
40
GE Industrial Systems