Basler Electric BE1-50/51B-240 User Manual
Page 33
9252000790 Rev B
25
Table 5. Time Characteristic Curve Constants with Switch SW3-3 Closed (On)
Curve
Type
Similar To
Figure
Number
Constants
BE
A
B
C
N
K
R
S
IAC 55
A-11
0.0286
0.0208
1.000
0.9844
0.028
0.0940
L
IAC 66
A-12
2.3955
0.00002
1.000
0.3125
0.028
7.8001
D
CO-6
A-4
0.4797
0.21359
1.000
1.5625
0.028
0.8750
M
CO-7
A-5
0.3022
0.12840
1.000
0.5000
0.028
1.7500
I
IAC 51
A-13
0.2747
0.1042
1.000
0.4375
0.028
0.8868
V
IAC 53
A-14
4.4309
0.0991
1.000
1.9531
0.028
5.8231
E
IAC 77
A-15
4.9883
0.0129
1.000
2.0469
0.028
4.7742
B
BS142-B
∗
A-9
1.4636
0.00000
1.000
1.0469
0.028
3.2500
C
BS142-C
∗
A-10
8.2506
0.00000
1.000
2.0469
0.028
8.0000
F
None†
None
0.0000
1.00000
0.000
0.0000
0.000
1.0000
∗ Curves B and C are defined in British Standard BS142 and IEC 255-4 (International
Electrotechnical Commission).
†
Fixed time from 0.1 to 9.9 seconds.
Characteristic Curves
Figure 13 through Figure 26 illustrate the BE1-50/51B-240 time overcurrent characteristic curves.
BE1-50/51B-240
Characteristic Curves