GE Multilin 745 User Manual

S4 Elements
745
Transformer Management Relay
Setpoints
http://www.GEindustrial.com/multilin
5–77
GE Multilin
c) Harmonic Derating
PATH: SETPOINTS !" S4 ELEMENTS !" HARMONICS !" W1(3) HARMONIC DERATING
• MINIMUM OPERATING CURRENT: Enter the minimum value of current (in
units of relay nominal current) required to allow the Harmonic Derating element
to operate.
• W1(3) HARMONIC DERATING PICKUP: Enter the harmonic derating below
which the Winding 1(3) Harmonic Derating will pickup and start the delay timer.
• W1(3) HARMONIC DERATING DELAY: Enter the time that the harmonic
derating must remain below the pickup level before the element operates.
FIGURE 5–38: Harmonic Derating Scheme Logic
! W1 HARMONIC [!]
DERATING
W1 HARM DERATING
FUNCTION: Disabled
Range: Enabled, Disabled
MESSAGE
W1 HARM DERATING
TARGET: Self-Reset
Range: Self-Reset, Latched, None
MESSAGE
MINIMUM OPERATING
CURRENT: 0.10 x CT
Range: 0.03 to 1.00 x CT in steps of
0.01
MESSAGE
W1 HARM DERATING
PICKUP: 0.90
Range: 0.01 to 0.98 in steps of 0.01
MESSAGE
W1 HARM DERATING
DELAY: 10 s
Range: 0 to 60000 s in steps of 1
MESSAGE
W1 HARM DERATING
BLOCK: Disabled
Range: Logc Inpt 1 to 16, Virt Inpt 1 to
16, Output Rly 2 to 8, SelfTest
Rly, Vir Outpt 1 to 5, Disabled

GE Multilin 745 Specifications

General

Brand	GE
Model	Multilin 745
Category	Relays
Language	English