GE 745 Instruction Manual page 162

S4 ELEMENTS
5.6.6 Neutral overcurrent
5.6.6.1 Main menu

NEUTRAL OC
5.6.6.2 Neutral Time Overcurrent
 W1 NTRL [
TIME OC
5–66
PATH: SETPOINTS


[ ]
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
In the 745, "neutral" refers to residual current (3I
of the three phases. The relay includes neutral time overcurrent and two levels of neutral
instantaneous overcurrent for each winding.
PATH: SETPOINTS
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]
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
S4 ELEMENTS NEUTRAL OC

 
W1 NTRL [ ]
TIME OC
 
W2 NTRL [ ]
TIME OC
 
W3 NTRL [ ]
TIME OC


W1 NTRL [ ]
INST OC 1

 W2 NTRL [ ]
INST OC 1
 
W3 NTRL [ ]
INST OC 1
 
W1 NTRL [ ]
INST OC 2
 
W2 NTRL [ ]
INST OC 2


W3 NTRL [ ]
INST OC 2
S4 ELEMENTS NEUTRAL OC

W1 NEUTRAL TIME OC
FUNCTION: Enabled
W1 NEUTRAL TIME OC
RLYS (1-8): --------
W1 NEUTRAL TIME OC
TARGET: Latched
W1 NEUTRAL TIME OC
PICKUP: 0.85 x CT
W1 NEUTRAL TIME OC
SHAPE: Ext Inverse
W1 NEUTRAL TIME OC
MULTIPLIER: 1.00
W1 NEUTRAL TIME OC
RESET: Linear
W1 NEUTRAL TIME OC
BLOCK: Disabled
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
See page 5–66
See page 5–66
See page 5–66
See page 5–68
See page 5–68
See page 5–68
See page 5–68
See page 5–68
See page 5–68
), calculated internally as the vector sum
0
W1(3) NTRL TIME OC

Range: Enabled, Disabled
Range: 1 to 8
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