4–110 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
OUTPUTS CHAPTER 4: SETPOINTS
EVENTS
Range: Disabled, Enabled
Default: Enabled
Figure 4-33: Auxiliary Relays generic logic
Virtual Outputs
The 889 relay is equipped with 96 virtual outputs that may be assigned for use via
FlexLogic. Virtual outputs not assigned for use are set to OFF (Logic 0).
A name can be assigned to each virtual output. Any change of state to a virtual output can
be logged as an event if programmed to do so. Virtual outputs are resolved in each
protection pass via the evaluation of FlexLogic equations.
For example, if Virtual Output 1 is the trip signal from FlexLogic and the trip relay is used to
signal events, the settings would be programmed as follows:
Virtual Output 1 NAME: Trip
Virtual Output 1 Events: Enabled
Path: Setpoints > Outputs > Virtual Outputs > Virtual Outputs 1 (32)
NAME
Range: up to 13 alphanumeric characters
Default: VO 1
An alphanumeric name may be assigned to a virtual output for diagnostic, setting, and
event recording purposes.
EVENTS
Range: Disabled, Enabled
Default: Disabled
892828A3.cdr
AND
SETPOINT
TYPE
Latched
Self-Reset
AND AND
OR
AND
OR
RESET (Command)
Operate Aux Output Relay
Pulsed
AND
SETPOINT
OPERATE
Off = 0 SEAL-IN TIME
SETPOINT
t
This setpoint is displayed only
upon “Pulsed” output type selection
OR
Operation (from Protection,
Control, or Monitoring Elements)
Relay ( Ready = 1)
Relay ( Ready = 1)
OR
BLOCK
SETTING
Off = 0
Relay ( Ready = 1)
Aux Relay X ON
FLEXLOGIC OPERAND
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