Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

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Installation and wiring Installation of the inverter and enclosure design
FR-A800 2 - 15
2.3.2 Cooling system types for inverter enclosure
From the enclosure that contains the inverter, the heat of the inverter and other equipment (trans-
formers, 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.
●
Cooling by natural heat dissipation from the enclosure surface (totally enclosed type)
●
Cooling by heatsink (aluminum fin, etc.)
●
Cooling by ventilation (forced ventilation type, pipe ventilation type)
●
Cooling by heat exchanger or cooler (heat pipe, cooler, etc.)
Cooling system Enclosure structure Comment
Natural
cooling
Natural ventilation
(enclosed, open type)
I001000E
This system is low in cost and generally used, but the
enclosure size increases as the inverter capacity
increases. This system is for relatively small capacities.
Natural ventilation
(totally enclosed type)
I001001E
Being a totally enclosed type, this system is the most
appropriate for hostile environment having dust, dirt,
oil mist, etc. The enclosure size increases depending on
the inverter capacity.
Forced
cooling
Heatsink cooling
I001002E
This system has restrictions on the heatsink mounting
position and area. This system is for relatively small
capacities.
Forced ventilation
I001003E
This system is for general indoor installation. This is
appropriate for enclosure downsizing and cost
reduction, and often used.
Heat pipe
I001004E
This is a totally enclosed for enclosure downsizing.
Tab. 2-5: Cooling system types for inverter enclosure
INV
INV
Heatsink
INV
INV
Heat pipe
INV