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Control Elements; Overview; Setting Groups - GE UR Series Instruction Manual

Line differential relay.
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5 SETTINGS

5.6 CONTROL ELEMENTS

CONTROL elements are generally used for control rather than protection. See the INTRODUCTION TO ELEMENTS sec-
tion at the front of this chapter for further information.
ÖØ
PATH: SETTINGS
CONTROL ELEMENTS

SETTING GROUPS

MESSAGE
MESSAGE
MESSAGE
MESSAGE
The Setting Groups menu controls the activation/deactivation of up to eight possible groups of settings in the
settings menu. The faceplate 'SETTINGS IN USE' LEDs indicate which active group (with a non-flashing energized
MENTS
LED) is in service.
The
setting prevents the active setting group from changing when the FlexLogic™ parameter is set to
SETTING GROUPS BLK
"On". This can be useful in applications where it is undesirable to change the settings under certain conditions, such as the
breaker being open.
Each
setting selects a FlexLogic™ operand which, when set, will make the particular setting group
GROUP ~ ACTIVATE ON
active for use by any grouped element. A priority scheme ensures that only one group is active at a given time – the high-
est-numbered group which is activated by its ACTIVATE ON parameter takes priority over the lower-numbered groups.
There is no "activate on" setting for group 1 (the default active group), because group 1 automatically becomes active if no
other group is active.
The relay can be set up via a FlexLogic™ equation to receive requests to activate or de-activate a particular non-default
settings group. The following FlexLogic™ equation (see the figure below) illustrates requests via remote communications
(e.g. VIRTUAL INPUT 1) or from a local contact input (e.g. H7a) 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 VIRTUAL OUTPUT 1 operand is used to control the ON state of a particular settings group.
Figure 5–64: EXAMPLE FLEXLOGIC™ CONTROL OF A SETTINGS GROUP
GE Power Management
Ö
SETTINGS GROUPS
SETTING GROUPS
FUNCTION: Disabled
SETTING GROUPS BLK:
Off
GROUP 2 ACTIVATE ON:
Off
GROUP 8 ACTIVATE ON:
Off
SETTING GROUP
EVENTS: Disabled
L90 Line Differential Relay
5.6 CONTROL ELEMENTS
5.6.2 SETTING GROUPS
Range: Disabled, Enabled
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: Disabled, Enabled

5.6.1 OVERVIEW

GROUPED ELE-
5
5-125

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L90

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