GE M60 Instruction Manual page 467
Motor protection system
Hide thumbs
Also See for M60:
- Instruction manual (612 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (494 pages)
Table of Contents
Advertisement
CHAPTER 5: SETTINGS
Multiplier
Current ( I / I
pickup
(TDM)
1.5
2.0
10.0
1.431
0.948
2
I
t curves
2
The I
t curves are derived as follows:
where
T = Operate time (in seconds)
TDM = Multiplier setting
I = Input current
I
= Pickup Current setting
pickup
T
= reset time in seconds (assuming energy capacity is 100% and RESET is "Timed")
RESET
2
Table 5-43: I
t curve trip times
Multiplier
Current ( I / I
(TDM)
1.5
0.01
0.44
0.10
4.44
1.00
44.44
10.00
444.44
100.00
4444.4
600.00
26666.7
FlexCurves
FlexCurves are described in the FlexCurves section later in this chapter. The curve shapes for the FlexCurves are derived
from the formulae:
where
T = operate time (in seconds)
TDM = Multiplier setting
I = Input Current
I
= Pickup Current setting
pickup
T
= Reset Time in seconds (assuming energy capacity is 100% and
RESET
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
)
3.0
4.0
5.0
0.699
0.613
0.569
)
pickup
2.0
3.0
4.0
0.25
0.11
0.06
2.50
1.11
0.63
25.00
11.11
6.25
250.00
111.11
62.50
2500.0
1111.1
625.00
15000.0
6666.7
3750.0
6.0
7.0
8.0
0.542
0.524
0.511
5.0
6.0
7.0
0.04
0.03
0.02
0.40
0.28
0.20
4.00
2.78
2.04
40.00
27.78
20.41
400.00
277.78
204.08
2400.0
1666.7
1224.5
: Timed)
RESET
GROUPED ELEMENTS
9.0
10.0
0.501
0.493
Eq. 5-43
8.0
9.0
10.0
0.02
0.01
0.01
0.16
0.12
0.10
1.56
1.23
1.00
15.63
12.35
10.00
156.25
123.46
100.00
937.50
740.74
600.00
Eq. 5-44
Eq. 5-45
5-259
5
Advertisement
Table of Contents
