GE Multilin 489 Instruction Manual page 142
Generator management relay
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Also See for Multilin 489:
- Instruction manual (306 pages) ,
- Communications manual (78 pages) ,
- Instruction manual (259 pages)
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5–32
Courtesy of NationalSwitchgear.com
Table 5–5: FlexCurve™ Trip Times
Pickup
Trip
Pickup
I/I
Time
I/I
pkp
pkp
(ms)
1.03
2.9
1.05
3.0
1.1
3.1
1.2
3.2
1.3
3.3
1.4
3.4
1.5
3.5
1.6
3.6
1.7
3.7
1.8
3.8
1.9
3.9
2.0
4.0
2.1
4.1
2.2
4.2
2.3
4.3
2.4
4.4
2.5
4.5
2.6
4.6
2.7
4.7
2.8
4.8
Definite Time Curve
The definite time curve shape causes a trip as soon as the pickup level is exceeded for a
specified period of time. The base definite time curve delay is 100 ms. The curve multiplier
of 0.00 to 1000.00 makes this delay adjustable from instantaneous to 100.00 seconds in
steps of 1 ms.
T
M
=
where: T = Trip Time in seconds
M = Multiplier Setpoint
I = Input Current
I
= Pickup Current Setpoint
pickup
Trip
Pickup
Trip
Time
I/I
Time
pkp
(ms)
(ms)
4.9
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
×
100 ms, when I
>
I
pickup
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
Pickup
Trip
I/I
Time
pkp
(ms)
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
(EQ 0.7)
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