Installation In Control Box - Mitsubishi Electric MELIPM Series Instruction Manual

2.1.2 Installation in control box

When installing the drive unit in a control box, the internal temperature of the
control box must not exceed the permissible value due to drive-unit generated
heat and peripheral-generated heat.
Placing a heat sink outside the control box can reduce the heat generated inside
the control box.
Measurement positions of ambient temperatures
5cm
5cm
Layout of drive units within control box
Ventilation fan
Drive unit
(Correct example) (Incorrect example)
Position of ventilation fan
Leave the specified clearances between the drive unit and control
box walls or other equipment. Not doing so can cause a failure. In
addition, improper convection of air in the control box will reduce the
heat dissipation effect. Fully consider the equipment layout in the
control box and the use of a cooling fan for ventilation, for example.
NOTICE
Measurement position
Drive
unit
5cm
Measurement position
Drive unit Drive unit
Drive unit
Built-in cooling fans
(Correct example)
Accommodation of two or more drive units
10cm
or more
Drive unit
1cm 1cm
or more or more
10cm
or more
These clearances are also required for
replacement of the cooling fan.
2-2
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2. INSTALLATION
(Incorrect example)
Leave sufficient
Cooling
clearances above
air
and under the drive
unit to ensure
adequate ventilation.
Cooling fan built
in the drive unit
Drive unit
Drive unit