Rockwell Automation RELIANCE ELECTRIC SP500 - 3.3 Selecting Input AC Line Branch Circuit Fuses

3.3 Selecting Input AC Line Branch Circuit Fuses
ATTENTION: Most codes require that upstream branch circuit protection
be provided to protect input power wiring. Install the fuses recommended
in table 3.9. Do not exceed the fuse ratings.
Input line branch circuit protection fuses must be used to protect the input power lines.
See figure 5.1. Table 3.9 shows recommended fuse values. These fuse ratings are
applicable for one drive per branch circuit. No other load may be applied to that fused
circuit. Note that contactors and circuit breakers are not recommended for AC input
line branch protection.
Table 3.9 — AC Input Line Fuse Selection Values
Model Fuse Model Fuse Model Fuse
Number Rating* Number Rating* Number Rating*
1SU11001 20A 1SU41001 6A 1SU51001 4A
1SU14001 12A 1SU44001 6A 1SU54001 4A
1SU41002 8A 1SU51002 7A
1$U21001 10A 1SU44002 8A 1SU54002 7A
1SU24001 10A 1SU41003 12A 1SU51003 10A
1$U21002 30A 1SU44003 12A 1SU54003 10A
1SU41005 25A 1SU51005 15A
1SU21001 12A
1SU44005 25A 1SU54005 15A
1SU24001 12A
1SU41007 25A 1SU51007 20A
18U21002 20A 1SU44007 25A 1SU54007 20A
1SU24002 20A 1SU41010 35A 1SU51010 25A
1SU21003 25A 1SU44010 35A 1SU54010 25A
1SU24003 25A 1SU41015 45A
1SU21005 35A 1$U42015 45A
1SU24005 35A 1SU41020 55A
1$U42020 55A
* Recommended fuse type: UL Class J, 600V, time-delay, or equivalent.
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SP500 AC Drive Installation and Operation Manual Version 3.1