Peripheral Devices E - 2
Branch Circuit Short Circuit Protection
The following peripheral devices may be required between the AC main circuit power supply and the Drive input terminals
L1(R), L2(S), and L3(T). Refer to applicable codes to determine the devices necessary for a given installation. Use Table E.1
or E.2 when selecting fuses and circuit breakers per the NEC. When selecting semiconductor fuses to provide Drive input I
2
t
protection and comply with UL, CSA, NEC, and CEC branch circuit short circuit protection requirements, select one of the
fuses in Table E.3 or E.4.
Fuse Type: UL designated Time-Delay or Non-Time-Delay Fuse
Class: CC, J, T, RK1 or RK5
Designators (typical): KTK, FNQ, FRS, LPJ, LPS, JKS, JJN, or JJS
Voltage Rating: 250V for Drives with 208-240V input
600V for Drives with 480V input
Circuit Breaker Type:Inverse Time (MCCB) or Instantaneous Trip (MCP)
Voltage Rating: 600V
Table E.1 Recommended Fuse and Circuit Breaker Ratings per NEC (208-240Vac Input)
Model
CIMR-F7U
Hp
Input
Amps
*1
(Continuous
Rating)
Output
Amps
*1
(Continuous
Rating)
Fuse
Selection Criteria
Circuit Breaker
Selection Criteria
Maximum
Time-Delay
Fuse Rating (A)
Maximum
Non-Time-Delay
Fuse Rating (A)
Maximum CB
Rating (A)
20P4 0.5/0.75 4.3 3.6 6 12 15
20P7 1 5.5 4.6 8 12 15
21P5 1.5/2 9.4 7.8 15 15 15
22P2 3 13 10.8 20 20 20
23P7 5 20 16.8 30 30 35
25P5 7.5 24 23 40 50 45
27P5 10 37 31 60 80 80
2011 15 53 46.2 80 80 100
2015 20 70 59.4 110 125 125
2018 25 89 74.8 125 150 150
2022 30 98 88 150 150 175
2030 40 120 115 200 200 225
2037 50 180 162 250 250 300
2045 60 212 192 300 300 350
2055 75 237 215 350 350 450
2075 75/100 350 312 450 450 600
2090 125 396 360 600 600 700
2110 150 457 415 700 700 900
*1 Input and Output Amps are based on the Normal Duty (ND) current rating. Consult the Specification section for details on the Heavy Duty (HD) and Normal Duty (ND) ratings.
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