Determining Wire And Fuse Sizes - Hitachi L300P Series Instruction Manual

2–14
Step-by-Step Basic Installation
Determining Wire
and Fuse Sizes
Motor
Output
HP kW
2 1.5
3 2.2
5 3.7
7.5 5.5
10 7.5
15 11
20 15
25 18.5
30 22
40 30
50 37
60 45
75 55
100 75
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
use shielded wire for any analog signals.
200V
Inverter
Models,
AWG
L300P
*3
–015LFU2 14
–022LFU2 14
–037LFU2 10
–055LFU2 8
–075LFU2 6
–110LFU2 4
–150LFU2 2
–185LFU2 1
–220LFU2 1/0
–300LFU2 1/0
–370LFU2 1/0 || 1/0
–450LFU2 1/0 || 1/0
–550LFU2 2/0 || 2/0
–750LFU2 3/0 || 3/0
Wiring *1
Power Lines *3
Fuse
(UL- Breaker
2
mm
rated, ( GFI
*3
class J, type) *2
600V)
2 10A 15A
2 15A 20A
3.5 20A 30A
5.5 30A 50A
8 40A 60A
14 60A 75A
22 70A 100A
14 || 2 90A 100A
38 100A 150A
22 || 22 150A 200A
30 || 30 175A 225A
38 || 38 200A 225A
60 || 60 250A 350A
80 || 80 300A 350A
2
). Be sure to
Brake Res.
Chassis Ground
AWG, AWG,
2
AWG
mm
rec. UL
16 14 1.25 14
16 14 1.25 14
10 12 3.5 10
8 10 5.5 8
8 10 8 8
4 10 14 8
3 8 22 8
3 8 22 —
2 8 30 —
2 6 30 —
1/0 6 50 —
3/0 6 80 —
3/0 4 80 —
3/0 4 80 —
2
mm
2
2
3.5
5.5
5.5
5.5
5.5
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