VFD68 Variable Frequency Drives (230 or 460 VAC)
13
Short Circuit Ratings
The VFD68 drives meet the requirements for their respective rating categories (Table 10).
Table 8: VFD68Bxx Drives Electrical Ratings
230 VAC
kW (HP)
0.1
(1/8)
0.2
(1/4)
0.4
(1/2)
0.75(
1)
1.5
(2)
2.2
(3)
3.7
(5)
5.5
(7.5)
7.5
(10)
11
(15)
15
(20)
Rated fuse voltage (V)
240 V or more
Fuse maximum
allowable rating (A)
(without power factor
improving reactor)
1
1.
Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
15
15
15
20
30
40
60
70
80
150
175
Molded case circuit
breaker (MCCB)
Maximum allowable
rating (A)
15
15
15
15
20
25
40
60
80
110
150
Table 9: VFD68Cxx Electrical Ratings
460 VAC
kW (HP)
0.4
(1/2)
0.75
(1)
1.5
(2)
2.2
(3)
3.7
(5)
5.5
(7.5)
7.5
(10)
11
(15)
15
(20)
Rated fuse voltage (V)
480 V or more
Fuse maximum allowable rating (A)
(without power factor improving
reactor)
1
1.
Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
6
10
15
20
30
40
70
80
90
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)
15
15
15
15
20
30
40
50
70
Table 10: VFD68 Drives Short Circuit Ratings
Rating Category
Suitable for use in a circuit capable of delivering not more than
VFD68Bxx Drives (230 VAC Class)
100 kA rms symmetrical amperes, 264 V maximum
VFD68Cxx Drives (460 VAC Class)
100 kA rms symmetrical amperes, 528 V maximum