GE D90 Plus Instruction Manual page 204

GROUPED PROTECTION ELEMENTS
Phase instantaneous overcurrent
196
The logic for the phase time overcurrent 1 element is shown below. The logic is identical for
all phase instantaneous overcurrent elements.
Figure 151: Phase time overcurrent 1 scheme logic
The phase instantaneous overcurrent element may be used as an instantaneous element
with no intentional delay or as a definite time element. The input current is the
fundamental phasor magnitude.
Select the Settings > Protection > Elements > Group 1 > Current > Phase IOC menu item
to open the phase instantaneous overcurrent configuration window.
Figure 152: Phase instantaneous overcurrent configuration settings
The following settings are available for each phase instantaneous overcurrent element.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION