Integrating reset, Table – Basler Electric BE1-50/51B-121 User Manual
Page 16
1-4
BE1-50/51B-214/-215/-223/-225 General Information
9252000994 Rev P
Table 1-3. Time Characteristic Curve Constants with SW3-3 Closed (On)
Curve Type *
Figure
Number †
Constants
BE1
Similar To
A
B
C
N
K
R
S
GE IAC 55
A-10
0.0286
0.0208
1.000
0.9844
0.028
0.0940
L
GE IAC 66
A-11
2.3955
0.00002
1.000
0.3125
0.028
7.8001
D
ABB CO-6
A-3
0.4797
0.21359
1.000
1.5625
0.028
0.8750
M
ABB CO-7
A-4
0.3022
0.12840
1.000
0.5000
0.028
1.7500
I
GE IAC 51
A-12
0.2747
0.1042
1.000
0.4375
0.028
0.8868
V
GE IAC 53
A-13
4.4309
0.0991
1.000
1.9531
0.028
5.8231
E
GE IAC 77
A-14
4.9883
0.0129
1.000
2.0469
0.028
4.7742
B
BS142-B ‡
A-8
1.4636
0.00000
1.000
1.0469
0.028
3.2500
C
BS142-C ‡
A-9
8.2506
0.00000
1.000
2.0469
0.028
8.0000
F
None §
N/A
0.0000
1.00000
0.000
0.0000
0.000
1.0000
Notes for Table
*
BE1 Curve Types:
S: Short InverseV: Very Inverse
s 1-2 and 1-3
L: Long InverseE: Extremely Inverse
D: Definite TimeB: BS142 Very Inverse
M: Moderately Inverse
C: BS142 Extremely Inverse
I: Inverse F: Fixed Time Delay
† Figure numbers refer to the characteristic curves located in Appendix A, Time Characteristic Curves.
‡ Curves B and C are defined in British Standard BS142 and IEC Standard IEC 255-4.
§ Fixed time delay, adjustable from 0.1 to 9.9 seconds.
Integrating Reset
Reset begins when the current drops below 95% of pickup. Integrating reset simulates the disk reset of
electromechanical relays. BE1-50/51B-214/-215/-223/-225 relays provide the integrating reset function
even when input current falls to zero.
Integrating reset characteristics are defined by the following equation and shown in Figure 1-1. Equation
constants are provided in Tables 1-2 or 1-3.
Integrating Reset Equation:
1
M
RD
T
2
R
−
=
Where:
T
R
= Time to reset in seconds
R = Constant for the particular curve
D = TIME DIAL setting
M = Current in multiples of PICKUP setting during reset