GE D90 Plus - Trip Output

324 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS CHAPTER 7: PROTECTION
takes priority over the lower-numbered groups. There is no activation setting group 1
(the default active group) since group 1 automatically becomes active when there is no
other group active.
Group 1 Name, Group 2 Name, Group 3 Name, Group 4 Name, Group 5 Name, Group 6
Name
Range: up to 16 alphanumeric characters
Default: empty
These settings allow the user to assign a name to each of the six settings groups.
Events
Range: Enabled, Disabled
Default: Disabled
This setting enables and disables logging of setting group control events in the sequence
of events recorder.
FlexLogic control of a settings group
The relay can be set up via a protection FlexLogic equation to receive requests to activate
or de-activate a particular non-default settings group. The following FlexLogic equation
illustrates requests via remote communications (for example, VIRT IP 1 ON) or from a local
contact input (for example, CONT IP 1 ON) to initiate the use of a particular settings group,
and requests from several overcurrent pickup measuring elements to inhibit the use of the
particular settings group. The assigned VIRT OP 1 operand is used to control the “On” state
of a particular settings group.
Figure 266: FlexLogic control of a settings group
Trip output
The trip output element is primarily used to collect trip requests from protection elements
and other inputs to generate output operands that initiate trip operations. Three-pole trips
only initiate reclosure if programmed to do so, whereas single-pole trips always
automatically initiate reclosure. The TRIP 3-POLE and TRIP 1-POLE output operands can also
be used as inputs to a FlexLogic OR gate to operate the front panel annunciator.
Three-pole operation
In applications where single-pole tripping is not required, the trip output element provides
a convenient method of collecting inputs to initiate tripping of circuit breakers, the reclose
element, and breaker failure elements.
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