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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
short circuit protection requirements, select one of the fuses in Table E.3 or E.4.
Fuse Type:
Circuit Breaker Type:
Table E.1 Recommended Fuse and Circuit Breaker Ratings per NEC (208 Vac Input)
Model
Hp
CIMR-E7U
20P4
0.5/0.75
20P7
1
21P5
1.5/2
22P2
3
23P7
5
25P5
7.5
27P5
10
2011
15
2015
20
2018
25
*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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2
t protection and comply with UL, CSA, NEC, and CEC branch circuit
UL designated Time-Delay or Non-Time-Delay Fuse
Class:
Designators (typical):KTK, FNQ, FRS, LPJ, LPS, JKS, JJN, or JJS
Voltage Rating:
Inverse Time (MCCB) or Instantaneous Trip (MCP)
Voltage Rating: 600V
Input
Output
Amps
Amps
*1
*1
(Continuous
(Continuous
Rating)
Rating)
4.3
3.6
5.5
4.6
9.4
7.8
13
10.8
20
16.8
24
23
37
31
53
46.2
70
59.4
89
74.8
Peripheral Devices E - 2
CC, J, T, RK1 or RK5
250V for Drives with 208V input
600V for Drives with 480V input
Fuse
Selection Criteria
Maximum
Maximum
Time-Delay
Non-Time-Delay
Fuse Rating (A)
Fuse Rating (A)
6
8
15
20
30
40
60
80
110
125
Circuit Breaker
Selection Criteria
Maximum CB
Rating (A)
12
15
12
15
15
15
20
20
30
35
50
45
80
80
80
100
125
125
150
150
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