Mitsubishi Electric FR-CC2-P, Инструкция по эксплуатации

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Installation of the converter unit and enclosure design
22
INSTALLATION AND WIRING
2.3.2
Cooling system types for converter unit
enclosure
From the enclosure that contains the converter unit, the heat of the converter unit 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 converter unit.
The cooling systems are classified as follows in terms of the cooling calculation method.
(a) Cooling by natural heat dissipation from the enclosure surface (totally enclosed type)
(b) Cooling by heat sink (aluminum fin, etc.)
(c) Cooling by ventilation (forced ventilation type, pipe ventilation type)
(d) Cooling by heat exchanger or cooler (heat pipe, cooler, etc.)
Cooling system Enclosure structure Comment
Natural
cooling
Natural ventilation
(enclosed ventilated type)
This system is low in cost and generally used, but the
enclosure size increases as the converter unit capacity
increases. This system is for relatively small capacities.
Natural ventilation (totally
enclosed type)
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 converter
unit capacity.
Forced
cooling
Heat sink cooling
This system has restrictions on the heat sink mounting
position and area. This system is for relatively small
capacities.
Forced ventilation
This system is for general indoor installation. This is
appropriate for enclosure downsizing and cost reduction, and
often used.
Heat pipe This is a totally enclosed for enclosure downsizing.
Converter
unit
Converter
unit
Heat sink
Converter
unit
Converter
unit
Heat pipe
Converter
unit