5-38
G650 Generator Protection & Control System
GEK-113285A
5.4 PROTECTION ELEMENTS
5 SETTINGS
5
5.4.2.5 I2T CURVES
The following formulas define this type of curves:
where:
t = Operation time in seconds
Dial = multiplier setting
I = Input current
Itap = Current pickup value
T
RESET
= reset time in seconds
Table 5–37: TRIPPING TIME IN SECONDS FOR I2T CURVES
5.4.2.6 DEFINITE TIME CURVES
The definite time makes the element trip
when the current value is maintained beyond the pickup value during a longer time
period than the set value. The Dial setting allows modifying this time frame from instantaneous to 900 seconds in steps of
10 ms.
5.4.2.7 RECTIFIER TIME CURVES
Rectifier curves are generated from the following formulas:
where:
T = Operation time (in seconds).
TDM = Multiplying factor
I = Input current
I
pickup
= Pickup current
T
reset
= Reset time (in seconds) assuming a 100% of power capacity and that the reset is activated
DIAL
CURRENT (I/ITAP)
1.5
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0.01
0.444
0.250
0.111
0.063
0.040
0.028
0.020
0.016
0.012
0.010
0.10
4.444
2.500
1.111
0.625
0.400
0.278
0.204
0.156
0.123
0.100
1.00
44.444
25.000
11.111
6.250
4.000
2.778
2.041
1.563
1.235
1.000
10.00
444.444
250.000
111.111
62.500
40.000
27.778
20.408
15.625
12.346
10.000
100.00
4444.444
2500.000
1111.111
625.000
400.000
277.778
204.082
156.250
123.457
100.000
600.00
26666.667 15000.000 6666.667
3750.000
2400.000
1666.667
1224.490
937.500
740.741
600.000
Summary of Contents for Multilin G650
Page 9: ...8 G650 Generator Protection Control System GEK 113285A TABLE OF CONTENTS ...
Page 426: ...GEK 113285A G650 Generator Protection Control System A 31 APPENDIX A A 1 LOGIC OPERANDS A ...
Page 427: ...A 32 G650 Generator Protection Control System GEK 113285A A 1 LOGIC OPERANDS APPENDIXA A ...
Page 587: ...C 22 G650 Generator Protection Control System GEK 113285A C 8 ANALOG INPUTS APPENDIXC C ...
Page 639: ...G 2 G650 Generator Protection Control System GEK 113285A G 1 GE MULTILIN WARRANTY APPENDIXG G ...