GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 94

5.6 S4 ELEMENTS
• HARMONIC AVERAGING: Select "Enabled" to use the three-phase average of the harmonic current against the har-
monic inhibit setting. For most applications, enabling harmonic averaging is not recommended.
• HARMONIC INHIBIT LEVEL: Enter the level of harmonic current (2
element will be inhibited from operating. For most applications, this level should be set to "20%".
5
d) ENERGIZATION INHIBIT
PATH: SETPOINTS S4 ELEMENTS
ENERGIZATN INHIBIT
[ENTER] for more
5-44
Courtesy of NationalSwitchgear.com
Figure 5–9: HARMONIC INHIBIT SCHEME LOGIC
DIFFERENTIAL ENERGIZATN INHIBIT
ð
ENERGIZATION INHIBIT
ENTER
FUNCTION: Enabled
ESCAPE
ENERGIZATION INHIBIT
ESCAPE
PARAMETERS: 2nd
MESSAGE
HARMONIC AVERAGING:
ESCAPE
Enabled
MESSAGE
ENERGIZATION INHIBIT
ESCAPE
LEVEL: 20.0% f0
MESSAGE
ENERGIZATION INHIBIT
ESCAPE
DURATION: 0.10 s
MESSAGE
MINIMUM ENERGIZATION
ESCAPE
CURRENT: 0.10 x CT
MESSAGE
ENERGIZATION SENSING
ESCAPE
BY VOLTAGE: Disabled
MESSAGE
MINIMUM ENERGIZATION
ESCAPE
VOLTAGE: 0.85 x VT
MESSAGE
BREAKERS ARE OPEN
ESCAPE
SIGNAL: Disabled
MESSAGE
PARALL XFMR BRKR CLS
ESCAPE
SIGNAL: Disabled
MESSAGE
745 Transformer Management Relay
nd nd th
or 2 +5 ) above which the percent differential
Range: Enabled, Disabled
Range: 2nd, 2nd + 5th
Range: Enabled, Disabled
Range: 0.1 to 65.0% f in steps of 0.1
0
Range: 0.05 to 600.00 s in steps of 0.01
Range: 0.10 to 0.50 x CT in steps of 0.01
Range: Enabled, Disabled
Seen only if Voltage Sensing is enabled.
Range: 0.50 to 0.99 x VT in steps of 0.01
Seen only if Voltage Sensing is enabled.
Range: Logic Input 1 to 16, Disabled
Range: Logic Input 1 to 16, Disabled
5 SETPOINTS
GE Multilin