Cooling System Types For Inverter Enclosure - Mitsubishi Electric FR-A820-00046 Instruction Manual

Installation and wiring
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
Natural
cooling
Forced
cooling
Tab. 2-5:
FR-A800
Enclosure structure
Natural ventilation
(enclosed, open type)
Natural ventilation
(totally enclosed type)
Heatsink
Heatsink cooling
Forced ventilation
Heat pipe
Cooling system types for inverter enclosure
Installation of the inverter and enclosure design
Comment
This system is low in cost and generally used, but the
enclosure size increases as the inverter capacity
INV
increases. This system is for relatively small capacities.
I001000E
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
INV
the inverter capacity.
I001001E
This system has restrictions on the heatsink mounting
INV position and area. This system is for relatively small
capacities.
I001002E
This system is for general indoor installation. This is
appropriate for enclosure downsizing and cost
INV
reduction, and often used.
I001003E
Heat pipe
This is a totally enclosed for enclosure downsizing.
INV
I001004E
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