Installation; Commissioning - GE 750 Instruction Manual

750/760
Feeder Management Relay

Installation

1–22
For the Neutral Instantaneous Overcurrent 1 element, enter the following values in
the
S5 PROTECTION NEUTRAL CURRENT
page. Press the MESSAGE key after each setpoint is completed to move to the next
message.
NEUTRAL INST OC 1 FUNCTION:
NEUTRAL INST OC 1 PICKUP:
NEUTRAL INST OC 1 DELAY:
For the Neutral Instantaneous Overcurrent 2 element, enter the following values in
the
S5 PROTECTION NEUTRAL CURRENT
page. Press the MESSAGE key after each setpoint is completed to move to the next
message.
NEUTRAL INST OC 2 FUNCTION:
NEUTRAL INST OC 2 PICKUP:
NEUTRAL INST OC 2 DELAY:
The Ground Overcurrent element is disabled by entering the following values in the
S5 PROTECTION GROUND CURRENT
GROUND TIME O/C FUNCTION:
GROUND INST O/C FUNCTION:
The Negative Sequence Overcurrent elements is disabled by entering the following
values in the
S5 PROTECTION
NEG SEQ TIME OVERCURRENT
NEG SEQ INST OVERCURRENT
Now that programming for the sample application is complete, the relay should be
put in the Ready state. Note that the relay is defaulted to the Not Ready state when
it leaves the factory. A minor self-test warning message informs the user that the
750/760 has not yet been programmed. If this warning is ignored, protection is
active and will be using factory default setpoints. The Relay In Service LED Indicator
will be on.
The following message indicates that the relay is in the Not Ready state:
SELF-TEST WARNING
Relay Not Ready
Move to the
S1 RELAY SETUP
put the relay in the Ready state, press the VALUE
displayed and press ENTER. Enter "Yes" at the
Service LED Indicator will now turn on and the
diagnostic message will disappear.
Ready

Commissioning

Extensive commissioning tests are available in Chapter 7: Commissioning.
Commissioning tables for recording required settings are available in Microsoft Excel
format from the GE Multilin website at http://www.GEmultilin.com. The website also
contains additional technical papers and FAQs relevant to the 750/760 Feeder
Management Relay.
http://www.GEmultilin.com
NEUTRAL INST OVERCURRENT 1
"Trip"
"0.20 x CT" (from 120 A pickup / 600 A primary)
"0.00 s"
NEUTRAL INST OVERCURRENT 2
"Trip"
"3.33 x CT" (from 2000 A pickup / 600 A primary)
"0.00 s"
GROUND TIME OVERCURRENT
"Disabled"
"Disabled"
setpoints page:
NEGATIVE SEQUENCE
NEG SEQ TIME OC FUNCTION:
NEG SEQ INST OC FUNCTION:
INSTALLATION 750 OPERATION
key until the
ARE YOU SURE?
SELF TEST WARNING: Relay Not
Commissioning
setpoints
setpoints
setpoints page:
"Disabled"
"Disabled"
setpoint message. To
message is
READY
prompt. The Relay In
GE Multilin