Справочник Пользователя для Mitsubishi Electronics FR-A720-0.4k to 90k

From the enclosure that contains the inverter, the heat of the inverter and other equipment (transformers, lamps,
resistors, etc.) and the incoming heat such as direct sunlight must be dissipated to keep the in-enclosure temperature
lower than the permissible temperatures of the in-enclosure equipment including the inverter.
The cooling systems are classified as follows in terms of the cooling calculation method.
1) Cooling by natural heat dissipation from the enclosure surface (Totally enclosed type)
2) Cooling by heat sink (Aluminum fin, etc.)
3) Cooling by ventilation (Forced ventilation type, pipe ventilation type)
4) Cooling by heat exchanger or cooler (Heat pipe, cooler, etc.)

Natural ventilation 
(Enclosed, open type)

Low in cost and generally used, but the enclosure size 
increases as the inverter capacity increases. For 
relatively small capacities.

Natural ventilation (Totally 
enclosed type)

Being a totally enclosed type, the most appropriate for 
hostile environment having dust, dirt, oil mist, etc. The 
enclosure size increases depending on the inverter 
capacity.

Heatsink cooling

Having restrictions on the heatsink mounting position 
and area, and designed for relative small capacities.

Forced ventilation

For general indoor installation. Appropriate for enclosure 
downsizing and cost reduction, and often used.

Heat pipe

Totally enclosed type for enclosure downsizing.

Installation on the enclosure

INV

INV

INV

Heatsink

INV

INV

Heat 
pipe

When encasing multiple inverters, install them in parallel
as a cooling measure. Install the inverter vertically.

 * Refer to the clearances on the next page.

Vertical

*

Fix six positions for the FR-A740-160K to 355K
and fix eight positions for the FR-A740-400K to
500K.