GE Multilin 850

4–324 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CONTROL CHAPTER 4: SETPOINTS
Figure 4-146: Pole Discordance - Breaker pole failure operands (D)
Virtual Input Control
Path: Setpoints > Control > Virtual Input Control
FORCE VIRTUAL INPUT 1 (64)
Range: Off, On
Default: Off
The states of up to 64 Virtual Inputs are changed here. The current or selected status of
the Virtual Input is also shown here. The status is a state OFF (logic 0) or ON (logic 1). If the
corresponding Virtual Input selected under Setpoints/Inputs/Virtual Inputs is set to
“Latched,” the “On” command initiated from this menu stays “On” and the status of this
Virtual Input is also “On” until the “Off” command is received. If the Virtual Input type is
“Self-Reset,” the command and status of this Virtual Input reverts to “Off” after one
evaluation of the FlexLogic™ equations.
894185A1.cdr
FLEXLOGIC OPERAND
PD1-A Fail to Cls
FLEXLOGIC OPERAND
PD1-B Fail to Cls
FLEXLOGIC OPERAND
PD1-C Fail to Cls
OR OR OR
FLEXLOGIC OPERAND
PD1-A Fail to Open
FLEXLOGIC OPERAND
PD1-B Fail to Open
FLEXLOGIC OPERAND
PD1-C Fail to Open
OR OR OR
From contacts
based PD
detection logic
(B)
From currents
based PD
detection logic
(C)