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GE Multilin 489 Generator Management Relay 4-43
4 SETPOINTS 4.7 S6 VOLTAGE ELEMENTS
4
where: Z
primary
= primary ohms impedance
CT Ratio = programmed CT ratio, if CT ratio is 1200:5 use a value of 1200 / 5 = 240
VT Ratio = programmed VT ratio, if VT ratio is 100:1 use a value of 100
Figure 4–7: LOSS OF EXCITATION R-X DIAGRAM
4.7.10 DISTANCE ELEMENT
PATH: SETPOINTS ÖØ S6 VOLTAGE ELEMENTS ÖØ DISTANCE ELEMENT
DISTANCE ELEMENT
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STEP UP TRANSFORMER
SETUP: None
Range: None, Delta/Wye
FUSE FAILURE
SUPERVISION: On
Range: On, Off
ZONE #1
TRIP: Off
Range: Off, Latched, Unlatched
ASSIGN ZONE #1 TRIP
RELAYS (1-4): 1---
Range: Any combination of Relays 1 to 4
ZONE #1
REACH: 10.0 Ωsec
Range: 0.1 to 500.0 Ωsec in steps of 0.1
ZONE #1
ANGLE: 75°
Range: 50 to 85° in steps of 1
ZONE #1 TRIP
DELAY: 0.4 s
Range: 0.0 to 150.0 s in steps of 0.1
ZONE #2
TRIP: Off
Range: Off, Latched, Unlatched
ASSIGN ZONE #2 TRIP
RELAYS (1-4): 1---
Range: Any combination of Relays 1 to 4
ZONE #2
REACH: 15.0 Ωsec
Range: 0.1 to 500.0 Ωsec in steps of 0.1
ZONE #2
ANGLE: 75°
Range: 50 to 85° in steps of 1
ZONE #2 TRIP
DELAY: 2.0 s
Range: 0.0 to 150.0 s in steps of 0.1
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