2-1
Chapter 2 Mounting and Wiring the Inverter
2.1 Operating Environment
Install the inverter in an environment that satisfies the requirements listed in Table 2.1.
Table 2.1 Environmental Requirements
Item
Specifications
Site location
Indoors
Surrounding/ambient
temperature
-10 to +50
C (14 to 122
F) (Note 1)
Relative humidity
5 to 95% (No condensation)
Atmosphere
The inverter must not be exposed to dust, direct sunlight,
corrosive gases, flammable gases, oil mist, vapor or water drops.
Pollution degree 2 (IEC60664-1) (Note 2)
The atmosphere can contain a small amount of salt.
(0.01 mg/cm
2
or less per year)
The inverter must not be subjected to sudden changes in
temperature that will cause condensation to form.
Altitude
3300 ft (1000 m) max. (Note 3)
Atmospheric
pressure
86 to 106 kPa
Vibration
Inverters of
100 HP or below
(230 V series)
125 HP or below
(460 V series)
Inverters of
125 HP or above
(230 V series)
150 HP or above
(460 V series)
0.12 inch (3 mm)
(Max. amplitude)
0.12 inch (3 mm)
(Max. amplitude)
2 to less than 9 Hz
2 to less than 9 Hz
9.8 m/s
2
9 to less than 20 Hz
2 m/s
2
9 to less than 55 Hz
2 m/s
2
20 to less than 55 Hz
1 m/s
2
55 to less than 200 Hz
1 m/s
2
55 to less than 200 Hz
2.2 Installing the Inverter
(
1) Mounting base
Install the inverter on a base made of metal or other non-flammable material.
Install the inverter on a base made of metal or other non-flammable material.
Otherwise, a fire could occur.
(
2) Clearances
Ensure that the minimum clearances indicated in Figure 2.1 and Table 2.3 are
maintained at all times. When mounting the inverter in the panel of your system,
take extra care with ventilation inside the panel as the surrounding temperature
easily rises. Do not mount the inverter in a small panel with poor ventilation.
When mounting two or more inverters
When mounting two or more inverters in the same unit or panel, install them side
by side. When one must be mounted above the other, be sure to separate them
with a partition plate, or the like, so that any heat radiating from an inverter will not
affect the one/s above.
As long as the surrounding temperature is 40°C (104°F) or lower, inverters of 40
HP or below can be mounted side by side without any clearance between them.
Table 2.3 Clearances
inch (mm)
Inverter capacity
A
B
C
0.5 to 2 HP
2.0 (50)
3.9 (100)
0
3 to 40 HP
0.39 (10)
50 to 450 HP
2.0 (50)
3.9 (100)
500 to 1000 HP
5.9 (150)
5.9 (150)
C: Space required in front of the inverter unit
Table 2.2 Output Current Derating
Factor in Relation to Altitude
Altitude
Output current
derating factor
3300 ft (1000 m)
or lower
1.00
3300 to 4900 ft
(1000 to 1500 m)
0.97
4900 to 6600 ft
(1500 to 2000 m)
0.95
6600 to 8200 ft
(2000 to 2500 m)
0.91
8200 to 9800 ft
(2500 to 3000 m)
0.88
(Note 1) When inverters (40 HP or
below) are mounted side-by-side without
any clearance between them, the
surrounding temperature should be within
the range from -10 to +40
C (14 to 104
F).
This specification also applies to the
inverters (40 HP) equipped with a NEMA1
kit.
(Note 2) Do not install the inverter in an
environment where it may be exposed to
lint, cotton waste or moist dust or dirt
which will clog the heat sink of the
inverter. If the inverter is to be used in
such an environment, install it in a
dustproof panel.
(Note 3) If you use the inverter in an
altitude above 3300 ft (1000 m), you
should apply an output current derating
factor as listed in Table 2.2.
Figure 2.1 Mounting Direction and
Required Clearances
