Setpoint Group; Differential Element - GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual

5.6 S4 ELEMENTS
PATH: SETPOINTS S4 ELEMENTS

SETPOINT GROUP

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Each protection and monitoring element setpoint (programmed in
organized in four setpoint groups. Only one group of settings are active in the protection scheme at a time. The active
group can be selected using the
viewed or edited using the
• ACTIVE SETPOINT GROUP: Select the number of the
tion scheme. This selection will be overridden if a higher number setpoint group is activated using logic inputs.
• EDIT SETPOINT GROUP: Select the number of the
5
via the front panel keypad or any of the communication ports. Selecting "Active Group" selects the currently active set-
point group for editing.
• GROUP 2(4) ACTIVATE SIGNAL: Select any logic input which, when asserted, will (remotely) select
to be the active group. This selection will be overridden if a higher number setpoint group is activated using the
2(4)
ACTIVE SETPOINT GROUP
a) MAIN MENU
PATH: SETPOINTS S4 ELEMENTS
DIFFERENTIAL
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This section contains the settings to configure the percent differential element, including all associated harmonic inhibit fea-
tures. The 745 provides three independent harmonic inhibit features:
scheme based on 2nd or 2nd + 5th harmonic which is 'in-circuit' at all times;
the characteristics of the inhibit scheme during energization to improve reliability; and
ments an inhibit scheme based on 5th harmonic only, allowing inhibiting the percent differential during intentional overexci-
tation of the system.
5-40
Courtesy of NationalSwitchgear.com
SETPOINT GROUP
ð
ACTIVE SETPOINT
ENTER
GROUP: Group 1
ESCAPE
EDIT SETPOINT
ESCAPE
GROUP: Active Group
MESSAGE
GROUP 2 ACTIVATE
ESCAPE
SIGNAL: Disabled
MESSAGE
GROUP 3 ACTIVATE
ESCAPE
SIGNAL: Disabled
MESSAGE
GROUP 4 ACTIVATE
ESCAPE
SIGNAL: Disabled
MESSAGE
ACTIVE SETPOINT GROUP
setpoint.
EDIT SETPOINT GROUP
setpoint or another logic input.
DIFFERENTIAL
ð
PERCENT DIFFERENTL
ENTER
[ENTER] for more
ESCAPE
HARMONIC INHIBIT
ESCAPE
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MESSAGE
ENERGIZATN INHIBIT
ESCAPE
[ENTER] for more
MESSAGE
5th HARM INHIBIT
ESCAPE
[ENTER] for more
MESSAGE
745 Transformer Management Relay
Range: Group 1, Group 2, Group 3, Group 4
Range: Group 1, Group 2, Group 3, Group 4,
Active Group
Range: Logic Input 1 to 16, Disabled
Range: Logic Input 1 to 16, Disabled
Range: Logic Input 1 to 16, Disabled
) has four copies, and these settings are
S4 ELEMENTS
setpoint or using a logic input. The setpoints in any group can be
whose settings are to be active in the protec-
SETPOINT GROUP
whose settings are to be viewed and/or edited
SETPOINT GROUP
See page 5–41.
See page 5–43.
See page 5–44.
See page 5–47.
HARMONIC INHIBIT
ENERGIZATION INHIBIT
5TH HARMONIC INHIBIT
5 SETPOINTS
5.6.2 SETPOINT GROUP
SETPOINT GROUP

5.6.3 DIFFERENTIAL ELEMENT

, which implements an inhibit
, which allows changing
, which imple-
GE Multilin