Application example
48 750/760 Quick Reference Guide
NEUTRAL TIME OC 1 FUNCTION: “Trip”
NEUTRAL TIME OC 1 PICKUP: “0.20 x CT” (from 120 A pickup / 600 A primary)
NEUTRAL TIME OC 1 CURVE: “Mod Inverse”
NEUTRAL TIME OC 1 MULTIPLIER: “10.00”
NEUTRAL TIME OC 1 RESET: “Instantaneous”
For the Neutral Instantaneous Overcurrent 1 element, enter the following values in the S5
PROTECTION
ZV NEUTRAL CURRENT ZV NEUTRAL INST OVERCURRENT 1 setpoints
page. Press the message down key after each setpoint is completed to move to the next
message.
NEUTRAL INST OC 1 FUNCTION: “Trip”
NEUTRAL INST OC 1 PICKUP: “0.20 x CT” (from 120 A pickup / 600 A primary)
NEUTRAL INST OC 1 DELAY: “0.00 s”
For the Neutral Instantaneous Overcurrent 2 element, enter the following values in the S5
PROTECTION
ZV NEUTRAL CURRENT ZV NEUTRAL INST OVERCURRENT 2 setpoints
page. Press the message down key after each setpoint is completed to move to the next
message.
NEUTRAL INST OC 2 FUNCTION: “Trip”
NEUTRAL INST OC 2 PICKUP: “3.33 x CT” (from 2000 A pickup / 600 A primary)
NEUTRAL INST OC 2 DELAY: “0.00 s”
The Ground Overcurrent element is disabled by entering the following values in the S5
PROTECTION
ZV GROUND CURRENT ZV GROUND TIME OVERCURRENT setpoints page:
GROUND TIME O/C FUNCTION: “Disabled”
GROUND INST O/C FUNCTION: “Disabled”
The Negative Sequence Overcurrent elements is disabled by entering the following values
in the S5 PROTECTION
ZV NEGATIVE SEQUENCE setpoints page:
NEG SEQ TIME OVERCURRENT
Z NEG SEQ TIME OC FUNCTION: “Disabled”
NEG SEQ INST OVERCURRENT
Z NEG SEQ INST OC FUNCTION: “Disabled”
Using EnerVista 750/760 Setup, select the Setpoints > S5 Protection > Neutral Current
menu item. All setpoints related to neutral current will appear grouped in a single page with
identification tabs as shown below:
Individual pages can also be selected by clicking on the corresponding group from the
menu tree. To set the Neutral Time Overcurrent 1 function:
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