IMPULSE
®
•G+ Mini Technical Manual
November 2020
Page 25
3.4 Suggested Circuit Protection and Wire Size
In order to comply with most safety standards, circuit protective devices should be used between the incoming
three-phase power supply and the IMPULSE
®
•G+ Mini. These devices can be thermal, magnetic, or molded-case
breakers (MCCB); or “slow-blow” type time-delay fuses.
NOTE:
The following are recommendations based on the rated capacity of the VFD. Per NEC guidelines, circuit
protection and wiring can be selected based on the capacity of the motor.
Recommended Circuit Protection
Recommended Wire Size (AWG)
(1)
,
(4)
Model
(-G+M)
Continuous
HD Input
Amps
Time Delay
Input Fuse
(A)
Time Delay
Input Fuse
Class
Inverse Time
Molded/
Case Circuit
Breaker (A)
(3)
Power Circuit
Wiring
Control
Wiring
Ground
Copper
(2)
230V Class
2001
1.5
3
CC
15
18 to 14
18 to 16
14
2003
2.9
5
CC
15
18 to 14
18 to 16
14
2005
5.8
10
CC
15
18 to 14
18 to 16
14
2008
7.5
15
CC
20
14 to 10
18 to 16
12
2011
11
20
CC
30
14 to 10
18 to 16
12
2017
18.9
35
CC
50
14 to 10
18 to 16
10
2025
24
45
J
60
10 to 6
18 to 16
8
2033
37
70
J
100
10 to 6
18 to 16
8
2047
52
100
J
150
6 to 4
18 to 16
4
2060
68
125
J
175
8 to 2
18 to 16
4
460V Class
4001
1.2
2
CC
15
14 to 10
18 to 16
14
4002
1.8
3
CC
15
14 to 10
18 to 16
14
4003
3.2
6
CC
15
14 to 10
18 to 16
14
4004
4.4
8
CC
15
14 to 10
18 to 16
14
4005
6.0
12
CC
15
14 to 10
18 to 16
12
4007
8.2
15
CC
25
14 to 10
18 to 16
12
4009
10.4
20
CC
30
14 to 10
18 to 16
12
4014
15
30
CC
40
14 to 10
18 to 16
10
4018
20
35
CC
50
10 to 6
18 to 16
10
4024
29
60
J
80
10 to 6
18 to 16
8
4031
39
70
J
100
10 to 6
18 to 16
8
1) NFPA 70 National Electric Code 2011. 430.122(a) and Table 610-14(a) 40°C, 60-minute, copper 50°C ambient
2) NFPA 70 National Electric Code 2011. Table 250.122.
3) NFPA 70 National Electric Code 2011. Table 430.52 (selected based on motor FLA).
4) NFPA 40 National Electric Code 2011. Table 315(b)(2)(a).
CAUTION
The following guidelines are suggested values. Always conform to local electrical codes and wiring practices.
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