Owner's manual

Appendix A
1503-UM051D-EN-P – June 2013
Typical Contactor Drop-out Times
The contactor drop-out times shown in the following table are typical
values used when the power fuses are provided as part of a complete
MV controller from Rockwell Automation. The recommendations
are based on Ferraz Shawmut power fuses. Other fuse types may
require alternate drop-out time settings.
Table A.1 – Contactor Drop-out Times
Fuse Rating Contactor Drop-out Time (msec)
Voltage Current 400A 800A
2R
3R
4R
6R
9R
12R
18R
19R
50
24R 100
32R 240
38R

50
48X

75
57X

200
2 x 24R

100
2 x 32R

240
< 5000
2 x 38R

240 *
20E
30E
40E
50E
65E
80E
100E
125E
150E
175E
200E
250E
300E
50
350E 75
400E 100
450E 130
500E

50
600E

75
750E

200
< 5000
900E

240 *
 Fuse not suitable for use with 400A contactor.