GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 110

5.6 S4 ELEMENTS
b) GROUND TIME OVERCURRENT
PATH: SETPOINTS S4 ELEMENTS
W1 GND TIME OC
[ENTER] for more
• W1(3) GROUND TIME OC PICKUP: Enter the level of ground current (in units of relay nominal current) above which
the Winding 1(3) Ground Time Overcurrent element will pickup and start timing.
5
• W1(3) GROUND TIME OC SHAPE: Select the time overcurrent curve shape to be used for the Winding 1(3) Ground
Time Overcurrent element. Refer to Time Overcurrent Curves on page 5–49 for a description of the time overcurrent
curve shapes.
• W1(3) GROUND TIME OC MULTIPLIER: Enter the multiplier constant by which the selected time overcurrent curve
shape (the base curve) is to be shifted in time.
• W1(3) GROUND TIME OC RESET: Enter the multiplier constant by which the selected time overcurrent curve shape
(the base curve) is to be shifted in time.
5-60
Courtesy of NationalSwitchgear.com
GROUND OC W1(3) GND TIME OC
ð
W1 GROUND TIME OC
ENTER
FUNCTION: Enabled
ESCAPE
W1 GROUND TIME OC
ESCAPE
TARGET: Latched
MESSAGE
W1 GROUND TIME OC
ESCAPE
PICKUP: 0.85 x CT
MESSAGE
W1 GROUND TIME OC
ESCAPE
SHAPE: Ext Inverse
MESSAGE
W1 GROUND TIME OC
ESCAPE
MULTIPLIER: 1.00
MESSAGE
W1 GROUND TIME OC
ESCAPE
RESET: Linear
MESSAGE
W1 GROUND TIME OC
ESCAPE
BLOCK: Disabled
MESSAGE
Figure 5–19: GROUND TOC SCHEME LOGIC
745 Transformer Management Relay
Range: Enabled, Disabled
Range: Self-Reset, Latched, None
Range: 0.05 to 20.00 x CT in steps of 0.01
Range: see description below
Range: 0.00 to 100.00 in steps of 0.01
Range: Instantaneous, Linear
Range: Logc Inpt 1 to 16, Virt Inpt 1 to 16, Output Rly 2 to
8, SelfTest Rly, Vir Outpt 1 to 5, Disabled
5 SETPOINTS
GE Multilin