GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 124

5.6 S4 ELEMENTS
b) 5TH HARMONIC LEVEL
PATH: SETPOINTS S4 ELEMENTS
5th HARMONIC LEVEL
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• MINIMUM OPERATING CURRENT: Enter the minimum value of current (in units of relay nominal current) required to
allow the 5th harmonic level element to operate.
• 5TH HARMONIC LEVEL PICKUP: Enter the 5th harmonic current (in %ƒ
ment will pickup and start the delay timer.
• 5TH HARMONIC LEVEL DELAY: Enter the time that the 5th harmonic current must remain above the pickup level
5
before the element operates.
5-74
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OVEREXCITATION 5th HARMONIC LEVEL
ð
5th HARMONIC LEVEL
ENTER
FUNCTION: Disabled
ESCAPE
5th HARMONIC LEVEL
ESCAPE
TARGET: Self-Reset
MESSAGE
MINIMUM OPERATING
ESCAPE
CURRENT: 0.10 x CT
MESSAGE
5th HARMONIC LEVEL
ESCAPE
PICKUP: 10.0% f0
MESSAGE
5th HARMONIC LEVEL
ESCAPE
DELAY: 10 s
MESSAGE
5th HARMONIC LEVEL
ESCAPE
BLOCK: Disabled
MESSAGE
Figure 5–32: 5TH HARMONIC LEVEL SCHEME LOGIC
745 Transformer Management Relay
Range: Enabled, Disabled
Range: Self-Reset, Latched, None
Range: 0.03 to 1.00 x CT in steps of 0.01
Range: 0.1 to 99.9% f in steps of 0.1
0
Range: 0 to 60000 s in steps of 1
Range: Logc Inpt 1 to 16, Virt Inpt 1 to 16, Output Rly 2 to
8, SelfTest Rly, Vir Outpt 1 to 5, Disabled
) above which the 5th harmonic level ele-
0
5 SETPOINTS
GE Multilin