Time overcurrent characteristic curve graphs – Basler Electric BE1-11m User Manual
Page 472
460
9424200996 Rev L
Curve
Selection
Curve Name
Trip Characteristic Constants
Reset
∗
A
B
C
N
K
R
A1
IEC Inverse
0.14
0
1
0.02
0
20
I1
CO Inverse Time
8.9341
0.17966
1
2.0938
0.028
9
I2
IAC Inverse Time
0.2747
0.10426
1
0.4375
0.028
0.8868
M
CO Moderately Inverse
0.3022
0.1284
1
0.5
0.028
1.75
D1
IEEE Moderately Inverse
0.0515
0.114
1
0.02
0
4.85
L1
CO Long Inverse
5.6143
2.18592
1
1
0.028
15.75
L2
IAC Long Inverse
2.3955
0
1
0.3125
0.028
7.8001
G
Long Time Inverse (I
2
t)
12.1212
0
1
1
0.028
29
V1
CO Very Inverse
5.4678
0.10814
1
2.0469
0.028
5.5
V2
IAC Very Inverse
4.4309
0.0991
1
1.9531
0.028
5.8231
B
Very Inverse (I
2
t)
1.4636
0
1
1.0469
0.028
3.25
B1
IEC Very Inverse
13.5
0
1
1
0
30.6
E3
IEEE Very Inverse
19.61
0.491
1
2
0
21.6
E1
CO Extremely Inverse
7.7624
0.02758
1
2.0938
0.028
7.75
E2
IAC Extremely Inverse
4.9883
0.0129
1
2.0469
0.028
4.7742
C
Extremely Inverse (I
2
t)
8.2506
0
1
2.0469
0.028
8
C1
IEC Extremely Inverse
80
0
1
2
0
77.6
F1
IEEE Extremely Inverse
28.2
0.1217
1
2
0
29.1
D
CO Definite Time
0.4797
0.21359
1
1.5625
0.028
0.875
F
Fixed Time ‡
0
1
0
0
0
1
46
K Factor
†
0
0
2
0.028
100
P
User Programmable §
0 to 600
0 to 25
0 to 1
0.5 to 2.5
0.028
0 to 30
T1
User Table 1
║
n/a
n/a
n/a
n/a
n/a
n/a
T2
User Table 2
║
n/a
n/a
n/a
n/a
n/a
n/a
T3
User Table 3
║
n/a
n/a
n/a
n/a
n/a
n/a
T4
User Table 4
║
n/a
n/a
n/a
n/a
n/a
n/a
∗ Instantaneous or integrating reset is selected on the Inverse Overcurrent setup screen in
BESTCOMSPlus
®.
† Constant A is variable for the 46 curve and is determined, as necessary, based on system full-load
current setting, minimum pickup, and K factor settings.
‡ Curve F has a fixed delay of one second times the Time Dial setting.
§ The programmable curve allows for four significant digits after the decimal place for every variable.
║ There is a minimum of 2 and maximum of 40 points that can be entered for any one T curve. For
information on setting T curves, refer to the
Inverse Overcurrent (51) Protection
chapter.
Time Overcurrent Characteristic Curve Graphs
The figures after the tables illustrate the characteristic curves of the BE1-11m. Table 193 cross-references
each curve to existing electromechanical relay characteristics. Equivalent time dial settings were
calculated at a value of five times pickup.
Time Curve Characteristics
BE1-11m