High-Set Phase Oc - GE Multilin 489 Instruction Manual

5.6.10 High-Set Phase OC

1 HIGH-SET
PHASE OVERCURRENT
5–42
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AUXILIARY
CONTACT
GROUNDING SWITCH
59G
TO Vneutral OF EACH 489
FIGURE 5–5: Ground Directional Detection
PATH: SETPOINTS S5 CURRENT ELEM.
[ ] HIGH-SET PHASE O/C
TRIP: Off
ASSIGN TRIP
MESSAGE
RELAYS (1-4): 1---
HIGH-SET PHASE O/C
MESSAGE
PICKUP: 5.00 x CT
HIGH-SET PHASE O/C
MESSAGE
DELAY: 1.00 s
If any individual phase current exceeds the pickup level for the specified trip time a trip will
occur if the feature is enabled. The element operates in both online and offline conditions.
This element can be used as a backup feature to other protection elements. In situations
where generators are connected in parallel this element would be set above the maximum
current contribution from the generator on which the protection is installed. With this
setting, the element would provide proper selective tripping. The basic operating time of
the element with no time delay is 50 ms at 50/60 Hz.
CHAPTER 5: SETPOINTS
C(B)
C(B)
A
B(C)
B(C)
HIGH-SET PHASE OVERCURRENT
Range: Off, Latched, Unlatched
Range: Any combination of Relays 1 to
4
Range: 0.15 to 20.00 x CT in steps of
0.01
Range: 0.00 to 100.00 s in steps of 0.01
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
A
I0
TO 50:0.025
GROUND
50:0.025
INPUTS
808812A3.CDR