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S4 Elements
! W1 PHASE
INST OC 1
GE Multilin
time
FIGURE 5–14: Harmonic Derating Correction
FIGURE 5–15: Phase Time Overcurrent Scheme Logic
d) Winding 1 to 3 Phase Instantaneous Overcurrent
PATH: SETPOINTS
!"
S4 ELEMENTS
[!]
W1 PHASE INST OC 1
FUNCTION: Enabled
W1 PHASE INST OC 1
MESSAGE
TARGET: Latched
W1 PHASE INST OC 1
MESSAGE
PICKUP: 10.00 x CT
W1 PHASE INST OC 1
MESSAGE
DELAY:
W1 PHASE INST OC 1
MESSAGE
BLOCK: Disabled
http://www.GEindustrial.com/multilin
Transformer Management Relay
Transformer thermal
damage curve
Selected relay time
overcurrent curve
Transformer thermal
protection margin
current
Pickup setting based
rated load capability
Pickup shifted based
on harmonic derating
!"
PHASE OC
!"
W1(3) PHASE INST OC 1(2)
Range: Enabled, Disabled
Range: Self-Reset, Latched, None
Range: 0.05 to 20.00 x CT in steps of
0.01
Range: 0 to 60000 ms in steps of 1
0 ms
Range: Logc Inpt 1 to 16, Virt Inpt 1 to
16, Output Rly 2 to 8, SelfTest
Rly, Vir Outpt 1 to 5, Disabled
745
5–55
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