Ground Overcurrent - GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual

5 SETPOINTS
a) MAIN MENU
PATH: SETPOINTS S4 ELEMENTS
GROUND OC
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In the 745, "ground" refers to the current measured in a CT in the connection between the transformer neutral and ground.
The 745 has two ground inputs which are automatically assigned to wye or zig-zag connected windings, based on the
transformer type selected. As a result, only those ground overcurrent settings whose winding is assigned a ground input
are displayed and enabled. This section contains the settings to configure the ground overcurrent elements. Included are
ground time overcurrents for each (wye or zig-zag) winding, and two levels of ground instantaneous overcurrent for each
(wye or zig-zag) winding.
GE Multilin
Courtesy of NationalSwitchgear.com
GROUND OC
ð
W1 GND TIME OC
ENTER
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ESCAPE
W2 GND TIME OC
ESCAPE
[ENTER] for more
MESSAGE
W3 GND TIME OC
ESCAPE
[ENTER] for more
MESSAGE
W1 GND INST OC 1
ESCAPE
[ENTER] for more
MESSAGE
W2 GND INST OC 1
ESCAPE
[ENTER] for more
MESSAGE
W3 GND INST OC 1
ESCAPE
[ENTER] for more
MESSAGE
W1 GND INST OC 2
ESCAPE
[ENTER] for more
MESSAGE
W2 GND INST OC 2
ESCAPE
[ENTER] for more
MESSAGE
W3 GND INST OC 2
ESCAPE
[ENTER] for more
MESSAGE
745 Transformer Management Relay
5.6 S4 ELEMENTS

5.6.7 GROUND OVERCURRENT

See page 5–60.
See page 5–60.
See page 5–60.
See page 5–61.
See page 5–61.
See page 5–61.
See page 5–61.
See page 5–61.
See page 5–61.
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