GE Multilin 350 Series

6–144 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S5 INPUTS/OUTPUTS CHAPTER 6: SETPOINTS
PATH: SETPOINTS > S5 INPUTS/OUTPUTS > VIRTUAL INPUTS
VI x FUNCTION
Range: Disabled/Enabled
Default: Disabled
The Virtual Input is enabled and ready to be triggered when set to Enabled. All virtual
inputs will appear under the
S4 CONTROLS > SETPOINTS > S4 VIRTUAL INPUTS menu.
VI x TYPE
Range: Self-Reset, Latched
Default: Self-reset
When the Self-Reset type is selected, the Virtual Input will be evaluated for one
protection pass only, upon “On” initiation and it will reset. When the Latched type is
selected, the virtual input will keep the state “On” until reset command “Off” is initiated.
NOTE
NOTE:
See also the Virtual Inputs section under S4 CONTROLS, on how to trigger a virtual input
signal state.
Virtual input programming begins with enabling the Virtual Input Function, and selecting
the Virtual Input Type Self-Reset or Latched under
SETPOINTS > S5 INPUTS/OUTPUTS >
VIRTUAL INPUTS. Next, the user can assign a command On/Off to the enabled Virtual Input
under
SETPOINTS > S4 CONTROLS > S4 VIRTUAL INPUTS. Referring to the Virtual Inputs logic
diagram below, a Virtual Input type can be selected to be either Self-Reset, or Latched.
When Self-Reset is selected and the “On” command is executed, the virtual input is
evaluated as a pulse at a rate of one protection pass. To prolong the time of the virtual
input pulse, one can assign it as a trigger source to a logic element with a dropout timer
set to the desired pulse time. Selecting the Latched type, will latch the virtual input state,
when the “On” command is executed.
NOTE
NOTE:
The "On" state of the Virtual Input will not be retained in the case of cycling of the relay
control power supply.
Courtesy of NationalSwitchgear.com