GE 750 Instruction Manual page 162

750/760
Feeder Management Relay
LINE
UNDERVOLTAGE 3
5–66
level is programmable to prevent undesired operation before voltage becomes
available. The setpoints for Bus Undervoltage 1 are shown above; the Bus
Undervoltage 2 setpoints are identical.
FIGURE 5–28: Bus Undervoltage Logic
c) Line Undervoltage
PATH: SETPOINTS S5 PROTECTION
[ ] LINE UNDERVOLT 3
FUNCTION: Disabled
LINE UNDERVOLT 3
MESSAGE
RELAYS (3-7): -----
LINE UNDERVOLT 3
MESSAGE
PICKUP: 0.75 x VT
LINE UNDERVOLT 3
MESSAGE
CURVE: Definite Time
LINE UNDERVOLT 3
MESSAGE
DELAY:
MIN OPERATING
MESSAGE
VOLTAGE: 0.30 x VT
Line undervoltage 3 and 4 are identical protection elements that generate outputs in
response to an undervoltage condition on the line voltage input. The time delay
characteristic can be programmed as either definite time or inverse time. A
minimum operating voltage level is programmable to prevent undesired operation
before voltage becomes available. The setpoints for the Line Undervoltage 3
element are shown above; the Line Undervoltage 4 setpoints are identical.
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VOLTAGE LINE UNDERVOLT AGE 3(4)
Range: Disabled, Trip, Alarm, Latched
Alarm, Control
Range: Any combination of 3 to 7
Auxiliary relays
Range: 0.00 to 1.25 x VT in steps of
0.01
Range: Definite Time, Inverse Time.
Range: 0.0 to 6000.0 s in steps of 0.1
2.0 s
Range: 0.00 to 1.25 x VT in steps of
0.01
S5 Protection
GE Multilin