Step-by-Step Basic Installation
In
v
e
rt
er Moun
ting
and Install
a
tion
2–18
Determining Wire
and Fuse Sizes
This section includes tables for 200V class and 400V class inverters (on the next page). The
following notes will help you read the tables in this section:
• Locate the row corresponding to the motor size and particular inverter in your application.
The maximum motor current determines the recommended wire sizes.
• The length column specifies that some inverters can optionally use a smaller wire gauge if
the wires are shorter than 10m and the inverter is located in an enclosure.
• Power Lines columns include wires connecting to terminals [R, S, T, U, V, W, P, PD, and N].
Only power input and motor leads will be fused: [R, S, T, U, V, and W]. The breaker ratings
(GFI—ground fault interrupter) are slightly higher than fuse ratings to allow for nominal
surges without tripping.
• The chassis ground columns list the Hitachi-recommended AWG and the minimal AWG for
UL conformity.
• The optional external braking resistor wiring only applies to a few models that have a built-
in braking unit. The other models use an optional external braking unit.
• Parallel wires increase effective wire gauge, and are denoted by “||” in the tables.
• Signal Lines, not listed in these tables, connect to the removable logic connector. The recom-
mended wire gauge for all wiring to the logic connector is 28 AWG (0.75 mm
2
). Be sure to
use shielded wire for any analog signals.
* See notes for wiring tables on the following page.
Motor
Output
200V
Inverter
Models
Wiring *1
Power Lines *3
Chassis Ground
Brake Res.
HP
kW
AWG
mm
2
Fuse
(UL-
rated,
class J,
600V)
Breaker
(GFI
type) *2
AWG,
rec.
AWG,
UL
mm
2
AWG
mm
2
0.5
0.4
SJ700–004LFUF2
20
1.25
10A
10A
20
20
1.25
20
1.25
1
0.75
SJ700–007LFUF2
18
1.25
10A
10A
20
20
1.25
20
1.25
2
1.5
SJ700–015LFUF2
14
2
10A
10A
14
14
2
14
2
3
2.2
SJ700–022LFUF2
14
2
15A
15A
14
14
2
14
2
5
3.7
SJ700–037LFUF2
10
3.5
20A
20A
10
10
3.5
10
3.5
7.5
5.5
SJ700–055LFUF2
8
5.5
30A
30A
8
10
5.5
8
5.5
10
7.5
SJ700–075LFUF2
6
8
40A
40A
8
10
8
6
8
15
11
SJ700–110LFUF2
4
14
60A
60A
4
10
14
10
14
20
15
SJ700–150LFUF2
2
22
80A
80A
3
8
22
8
22
25
18.5
SJ700–185LFU2
1
30
100A
100A
3
8
22
8
30
30
22
SJ700–220LFU2
1
38
125A
125A
2
8
30
6
38
40
30
SJ700–300LFU2
2/0
60 or
22 || 22
150A
150A
2
6
30
—
—
50
37
SJ700–370LFU2
4/0
100 or
38 || 38
175A
175A
1/0
6
38
—
—
60
45
SJ700–450LFU2
4/0
100 or
38 || 38
225A
225A
3/0
6
38
—
—
75
55
SJ700–550LFU2
2/0 || 2/0
150 or
60 || 60
250A
250A
3/0
4
60
—
—
