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-P7U
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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