GE Multilin 850 - Page 433

CHAPTER 4: SETPOINTS CONTROL
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–301
requires that the relay does not change from the present active group. This prevention of a
setpoint group change can be applied by setting Change Inhibit inputs (1 to 16). If needed,
typically this change inhibit is done when any of the overcurrent (phase, neutral, ground,
or negative sequence), overvoltage, bus or line undervoltage, or underfrequency elements
are picked-up.
Path: Setpoints > Control > Setpoint Groups
ACTIVE SETPOINT GROUP
Range: 1,2,3,4,5,6
Default: 1
The Active Setpoint Group setting is used for manual selection of the Active Setpoint
Group by setting.
SET GROUP 2 (3,4,5,6) ACTIVE
Range: Off, Any FlexLogic operand
Default: Off
The setpoint selects the FlexLogic operand that initiates change of the Active Setpoint
Group.
GROUP CHANGE INHIBIT 1 (UP TO 16)
Range: Off, Any FlexLogic operand
Default: Off
The setpoint selects the FlexLogic operand that inhibits change of the active setpoint
group.
EVENTS
Range: Disabled, Enabled
Default: Enabled