Allen-Bradley 1407-CGCM-DLR, User Manual, Page: 179 / 268

Rockwell Automation Publication 1407-UM002B-EN-P - February 2019 179
Time Over-current Characteristic Curves Appendix A
Time Dial Setting Cross-reference
Although the time characteristic curve shapes have been optimized for each relay,
time dial settings of the CGCM-DLR unit are not identical to the settings of
electromechanical induction disk over-current relays.
The Characteristic Curve Cross-reference table on page 180 helps you convert
the time dial settings of induction disk relays to the equivalent setting for the
CGCM-DLR unit.
Using Table
Inspection of published electromechanical time current characteristic curves
provide the cross-reference table values. The time delay for a current of five times
tap was entered into the time dial calculator function for each time dial setting.
The equivalent CGCM-DLR unit time dial setting was then entered into the
cross-reference table.
If your electromechanical relay time dial setting is between the values that are
provided in the table, it is necessary to interpolate (estimate the correct
intermediate value) between the electromechanical setting and the default
configuration.
Table 36 - Characteristic Curve Cross-reference
Curve Curve Name Page Similar To
1 S, Short Inverse 181 ABB CO-2
2 S2, Short Inverse 182 GE IAC-55
3 L, L1, Long Inverse 183 ABB CO-5
4 L2, Long Inverse 184 GE IAC-66
5 D, Definite Time 185 ABB CO-6
6 M, Moderately Inverse 186 ABB CO-7
7 I, I1 Inverse Time 187 ABB CO-8
8 I2 Inverse Time 188 GE IAC-51
9 V, V1 Very Inverse 189 ABB CO-9
10 V2, Very Inverse 190 GE IAC-53
11 E, E1 Extremely Inverse 191 ABB CO-11
12 E2, Extremely Inverse 192 GE IAC-77
13 A Standard Inverse 193 BS, IEC Standard Inverse
14 B, Very Inverse (It) 194
BS, IEC Very Inverse (I
2
t)
15
Extremely Inverse (I
2
t)
195
BS, IEC Extremely Inverse (I
2
t)
16 Long Time Inverse 196 BS, IEC Long Time Inverse
17 Fixed Time N/A N/A