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Chapter 2
(9) Reduction of enclosure size
If you mount the inverter inside an enclosure such that the heat sink of the inverter is positioned outside the
enclosure, the amount of heat produced inside the enclosure can be reduced and likewise the size of the enclosure.
Mounting the inverter in an enclosure with the heat sink positioned outside requires an optional dedicated special
metal fitting. To mount the inverter in an enclosure with the heat sink positioned outside, cut out the enclosure
panel according to the specified cutting dimensions. The cooling section (including the heat sink) positioned
outside the enclosure has a cooling fan. Therefore, do not place the enclosure in any environment where it is
exposed to waterdrops, oil mist, or dust.
(10) Approximate loss by inverter capacity
Inverter capacity (kW)
Loss with 70% load (W)
Loss with 100% load (W)
Efficiency at rated output (%)
Inverter capacity (kW)
Loss with 70% load (W)
Loss with 100% load (W)
Efficiency at rated output (%)
2.1.2 Backing plate
(1) For models with 30 kW or less capacity
On the backing plate, cut the joints around each section to be cut off with cutting pliers or a cutter, remove them,
and then perform the wiring.
(2) For the models with 37 kW to 75kW
1) For wiring without using conduits
Cut an X in each rubber bushing of the backing plate with cutting pliers or a cutter, and then perform the wiring.
2) For wiring using conduits
Remove the rubber bushings from the holes to be used for wiring with conduits, and then fit conduits into the
holes.
Note: Do not remove the rubber bushing from holes that are not used for wiring with a conduit.
If a cable is connected through the plate hole without a rubber bushing and conduit, the cable insulation may
be damaged by the edge of the hole, resulting in a short circuit or ground fault.
0.4
0.75
1.5
64
76
102
70
88
125
85.1
89.5
92.3
22
30
37
820
1100
1345
1150
1550
1900
95.0
95.0
95.1
Installation and Wiring
2.2
3.7/4.0
5.5
127
179
242
160
235
325
93.2
94.0
94.4
45
55
75
1625
1975
2675
2300
2800
3800
95.1
95.1
95.2
Joint
Section to be cut off
2-4
7.5
11
15
312
435
575
425
600
800
94.6
94.8
94.9
90
110
132/150
3375
3900
4670
4800
5550
6650
95.2
95.2
95.2
Backing plate
Rubber bushing
18.5
698
975
95.0
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