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Chapter 2 Installation and Wiring
2 - 2
2.1.1 Precautions for installation
(1) Transportation
The inverter uses plastic parts. When carrying the inverter, handle it carefully to prevent damage to the
parts.
Do not carry the inverter by holding the front or terminal block cover. Doing so may cause the inverter
to fall. Do not install and operate the inverter if it is damaged or its parts are missing.
(2) Surface on which to install the inverter
The inverter will reach a high temperature (up to about 150°C) during operation. Install the inverter on
a vertical wall surface made of nonflammable material (e.g., metal) to avoid the risk of fire.
Leave sufficient space around the inverter. In particular, keep sufficient distance between the inverter
and other heat sources (e.g., braking resistors and reactors) if they are installed in the vicinity.
(3) Ambient temperature
Avoid installing the inverter in a place where the ambient temperature goes above or below the
allowable range (-10°C to +40°C), as defined by the standard inverter specification.
Measure the temperature in a position about 5 cm distant from the bottom-center point of the inverter,
and check that the measured temperature is within the allowable range.
Operating the inverter at a temperature outside this range will shorten the inverter life (especially the
capacitor life).
(4) Humidity
Avoid installing the inverter in a place where the relative humidity goes above or below the allowable
range (20% to 90% RH), as defined by the standard inverter specification.
Avoid a place where the inverter is subject to condensation.
Condensation inside the inverter will result in short circuits and malfunctioning of electronic parts. Also
avoid places where the inverter is exposed to direct sunlight.
(5) Ambient air
Avoid installing the inverter in a place where the inverter is subject to dust, corrosive gases,
combustible gases, flammable gases, grinding fluid mist, or salt water.
Foreign particles or dust entering the inverter will cause it to fail. If you use the inverter in a
considerably dusty environment, install the inverter inside a totally enclosed panel.
5 cm or more 5 cm or more
(*1)
(*2)
Inverter
Keep enough clearance between the inverter
and the wiring ducts located above and
below the inverter to prevent the latter from
obstructing the ventilation of the inverter.
*1 10 cm or more for 11 to 75kW
30cm or more for 90 to 160kW
*2 10 cm or more for 11 to 75kW
30cm or more for 90 to 160kW
But for exchanging the DC bus capacitor,
take a distance.
22cm or more for 18.5 to 75kW
30cm or more for 90 to 160kW
Inverter
Air flow
Wall