GE 745 Instruction Manual page 184

S4 ELEMENTS
5.6.12 Harmonics
5.6.12.1 Main Menu

HARMONICS
5.6.12.2 THD Level

W1 THD LEVEL [
5–88
PATH: SETPOINTS S4 ELEMENTS
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[ ]

MESSAGE
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MESSAGE
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MESSAGE
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MESSAGE
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MESSAGE
This section contains the settings to configure the total harmonic distortion monitoring
elements. Included are a THD level element for each winding and each phase.
PATH: SETPOINTS S4 ELEMENTS
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] W1 THD LEVEL
FUNCTION: Disabled
W1 THD LEVEL
MESSAGE
RLYS (1-8): --------
W1 THD LEVEL
MESSAGE
TARGET: Self-Reset
MINIMUM OPERATING
MESSAGE
CURRENT: 0.10 x CT
W1 THD LEVEL
MESSAGE
PICKUP: 50.0% f0
W1 THD LEVEL
MESSAGE
DELAY: 10 s
W1 THD LEVEL
MESSAGE
BLOCK: Disabled
• MINIMUM OPERATING CURRENT: Enter the minimum value of current (in units of relay
nominal current) required to allow the THD level element to operate.
• W1(3) THD PICKUP LEVEL: Enter the total harmonic distortion (in %ƒ
the winding 1(3) total harmonic distortion element level will pickup and start the delay
timer.
• W1(3) THD LEVEL DELAY: Enter the time that the total harmonic distortion must
remain above the pickup level before the element operates.
HARMONICS
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W1 THD LEVEL [ ]

W2 THD LEVEL [ ]
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W3 THD LEVEL [ ]

W1 HARMONIC [ ]
DERATING

W2 HARMONIC [ ]
DERATING

W3 HARMONIC [ ]
DERATING
HARMONICS
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745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
See page 5–88
See page 5–88
See page 5–88
See page 5–89
See page 5–89
See page 5–89
W1(3) THD LEVEL

Range: Enabled, Disabled
Range: 1 to 8
Range: Self-Reset, Latched, None
Range: 0.03 to 1.00 x CT in steps of
0.01
Range: 0.1 to 50.0% 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
0