GE 745 TRANSFORMER MANAGEMENT RELAY User Manual

5-52 745 Transformer Management Relay GE Power Management
5.6 S4 ELEMENTS 5 SETPOINTS
5
5.6.5 INSTANTANEOUS DIFFERENTIAL
This section contains the settings to configure the (unrestrained) instantaneous differential element, for protec-
tion under high magnitude internal faults.
5.6.6 PHASE OVERCURRENT
This section contains settings to configure the phase overcurrent elements. Included are phase time overcur-
rents and two levels of phase instantaneous overcurrent for each phase of each winding.
a) WINDING 1 (2/3) PHASE TIME OVERCURRENT
y INST DIFFERENTIAL
y
[ENTER] for more
This message indicates the start of the
INSTANTANEOUS DIFFERENTIAL
section.
To continue with these setpoints press , or press to go to the
next section.
INST DIFFERENTIAL
FUNCTION: Enabled
Range: Disabled / Enabled
INST DIFFERENTIAL
TARGET: Latched
Range: Self-reset / Latched / None
Select “None” to inhibit the display of the target message when the element
operates. Thus an element whose “target type” is “None” never disables the
LED self-test feature since it cannot generate a displayable target message.
INST DIFFERENTIAL
PICKUP: 8.00 x CT
Range: 3.00 to 20.00 (steps of 0.01)
Enter the level of differential current (in units of relay nominal current) above
which the instantaneous differential element will pickup and operate.
INST DIFFERENTIAL
BLOCK: Disabled
Range: Disabled / Logc Inpt 1 (2-16) /Virt Inpt 1 (2-16) / Output Rly 1 (2-8) /
SelfTest Rly / Virt Outpt 1 (2-5)
y PHASE OC
y [ENTER] for more
This message indicates the start of the
PHASE OVERCURRENT
section. To
continue with these setpoints press , or press to go to the
next section.
y W1 PHASE TIME OC
y [ENTER] for more
This message indicates the start of the
PHASE TIME OVERCURRENT
section for
Winding 1 (2/3). To continue with these setpoints press , or press
to go to the next section.
W1 PHASE TIME OC
FUNCTION: Enabled
Range: Disabled / Enabled
W1 PHASE TIME OC
TARGET: Latched
Range: Self-reset / Latched / None
Select
None
to inhibit the display of the target message when the element
operates. Thus an element whose “target type” is
None
never disables the
LED self-test feature since it cannot generate a displayable target message.
W1 PHASE TIME OC
PICKUP: 1.20 x CT
Range: 0.05 to 20.00 (steps of 0.01)
Enter the phase current level (in units of relay nominal current) above which
the W1 (2/3) phase time overcurrent element will pickup and start timing.
ENTER
MESSAGE
ENTER
MESSAGE
ENTER
MESSAGE

GE 745 TRANSFORMER MANAGEMENT RELAY Specifications

General

Brand	GE
Model	745 TRANSFORMER MANAGEMENT RELAY
Category	Relays
Language	English