1.6 Precautions for Using Inverters
1-22
1.6 Precautions for Using Inverters
1.6.1 Operating environment
Install the inverter in an environment that satisfies the requirements listed below.
Table 1.6-1 Environmental Requirements
Item Specifications
Location Indoors
Surrounding
temperature
-10 to +50°C (Note 1)
Relative
humidity
5 to 95% (No condensation)
Ambience
The inverter must not be exposed to dust, direct sunlight, corrosive gases, flammable
gas, oil mist, vapor or water drops.
Pollution degree 2 (IEC60664-1) (Note 2)
The atmosphere can contain only 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 1000 m max. (Note 3)
Air pressure 86 to 106 kPa
55 kW or below (200 V class series),
75 kW or below (400 V class series)
75 kW or above (200 V class series), 
90 kW or above (400 V class series)
3 mm (Max.
amplitude)
2 to less than 9 Hz
3 mm (Max.
amplitude)
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
Vibration
1 m/s
2
55 to less than 200 Hz
Note 1) When inverters are mounted side-by-side without any gap between them (22 kW or below), the
surrounding temperature should be within the range from -10 to +40
°C.
Note 2) Do not install the inverter in an environment where it may be exposed to cotton waste or moist
dust or dirt which will clog the heat sink in the inverter. If the inverter is to be used in such an
environment, install it in the panel of your system or other dustproof containers.
Note 3) If you use the inverter in an altitude above 1000 m, you should apply an output current derating
factor as listed in Table 1.6-2.
Table 1.6-2 Output Current Derating Factor in Relation to Altitude
Altitude Output current derating factor
1,000 m or lower 1.00
1,000 to 1,500 m 0.97
1,500 to 2,000 m 0.95
2,000 to 2,500 m 0.91
2,500 to 3,000 m 0.88
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