S5 Protection Setpoints - GE 750 Instruction Manual

Application Example

S5 Protection Setpoints

GE Multilin
"Input 3"
LOCAL MODE:
"Input 6"
RESET:
"Input 4"
REMOTE OPEN:
"Input 5"
REMOTE CLOSE:
If, for example, the same logic input would be needed to perform the functionality of
Close and Reset, then the following should have been entered:
"Input 5"
RESET:
"Input 5"
REMOTE CLOSE:
To setup an Alarm-after-Delay input, make the following changes to the
setpoints page. Press the MESSAGE
INPUTS USER INPUT A
is completed to move to the next message.
"Substation Monitor"
USER INPUT A NAME:
"Input 1"
USER INPUT A SOURCE:
USER INPUT A FUNCTION:
USER INPUT A RELAYS (3-7):
"100.00 s"
USER INPUT A DELAY:
The S5 Protection setpoints page contains setpoints for entering protection element
characteristics. In our example, these characteristics are specified under the
PROTECTION PHASE CURRENT
this data and the resulting calculations, program the page S5 setpoints as indicated.
When setting the relay for the first time, other setpoints not listed in this example
will be left disabled.
For the Phase Time Overcurrent 1 element, enter the following values in the
PROTECTION PHASE CURRENT
key after each setpoint is completed to move to the next message.
PHASE TIME OC 1 FUNCTION:
PHASE TIME OC 1 PICKUP:
"Mod Inverse"
PHASE TIME OC 1 CURVE:
PHASE TIME OC 1 MULTIPLIER:
"Instantaneous"
PHASE TIME OC 1 RESET:
For the Phase Instantaneous Overcurrent 1 element, enter the following values in
the
S5 PROTECTION PHASE CURRENT
Press the MESSAGE key after each setpoint is completed to move to the next
message.
PHASE INST OC 1 FUNCTION:
"1.40 x CT" (calculated as 840 A pickup / 600 A primary)
PHASE INST OC 1 PICKUP:
"0.00 s"
PHASE INST OC 1 DELAY:
PHASES REQUIRED FOR OPERATION:
For the Phase Instantaneous Overcurrent 2 element, enter the following values in
the
S5 PROTECTION PHASE CURRENT
Press the MESSAGE key after each setpoint is completed to move to the next
message.
PHASE INST OC 2 FUNCTION:
PHASE INST OC 2 PICKUP:
"0.00 s"
PHASE INST OC 2 DELAY:
PHASES REQUIRED FOR OPERATION:
For the Neutral Time Overcurrent 1 element, enter the following values in the
PROTECTION NEUTRAL CURRENT
MESSAGE key after each setpoint is completed to move to the next message.
NEUTRAL TIME OC 1 FUNCTION:
NEUTRAL TIME OC 1 PICKUP:
NEUTRAL TIME OC 1 CURVE:
NEUTRAL TIME OC 1 MULTIPLIER:
NEUTRAL TIME OC 1 RESET:
http://www.GEmultilin.com
"Alarm"
"3----"
and
S5 PROTECTION NEUTRAL CURRENT
PHASE TIME OVERCURRENT 1
"Trip"
"1.40 x CT" (calculated as 840 A pickup / 600 A primary)
"20.20"
PHASE INST OVERCURRENT 1
"Trip"
"Any Two"
PHASE INST OVERCURRENT 2
"Trip"
"16.83 x CT" (from 10100 A pickup / 600 A primary)
"Any Two"
NEUTRAL TIME OVERCURRENT 1
"Trip"
"0.20 x CT" (from 120 A pickup / 600 A primary)
"Mod Inverse"
"10.00"
"Instantaneous"
750/760
Feeder Management Relay
S3 LOGIC
key after each setpoint
S5
headings. From
S5
page. Press the MESSAGE
setpoints page.
setpoints page.
S5
page. Press the
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