CHAPTER 6: PROTECTION SETPOINTS ADMITTANCE
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–119
MODE
Range: Y0, G0, B0
Default: Y0
This setting selects the protection criterion (characteristic quantity) of the Neutral
Admittance Ground Fault protection. When this value is set to Y0, G0 and B0, the
protection criterion is Neutral-Admittance, Neutral-Conductance, and Neutral-
Susceptance, respectively.
DIRECTION
Range: Non-directional, Forward, Reverse
Default: Non-directional
When set to “Non-Directional”, the element operates in both forward and reverse
direction. If set to “Forward”, the element operates when the fault is detected in the
forward direction. When set to “Reverse”, the element operates when the fault is
detected in the Reverse direction.The following figures show the interactions between
different setting options of the parameters Mode and Direction per the tripping and
operating ranges of the Neutral Admittance Ground Fault protection.
FAST PATH:
This is setting is not applicable to protection criterion mode Y0.
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