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Chapter 2
(6) Installation method and position
Install the inverter vertically and securely with screws or bolts on a surface that is free from vibrations and that can
bear the inverter weight. If the inverter is not installed vertically, its cooling performance may be degraded and
tripping or inverter damage may result.
(7) When mounting multiple inverters in an enclosure with a ventilation fan, carefully design the layout of the
ventilation fan, air intake port, and inverters. An inappropriate layout will reduce the inverter-cooling effect and
raise the ambient temperature. Plan the layout so that the inverter ambient temperature will remain within the
allowable range.
(8) Mounting in an enclosure
The internal fan releases the heat generated by the inverter from the upper part of the inverter. When it is
necessary to install a device above the inverter, please ensure that the device is protected against this heat.
When several inverters are mounted in the same cabinet the standard arrangement of the inverters is side-by-side
with certain space as shown in the figure on the left below. If the inverters must be mounted one above the other
in order to save the cabinet space or similar, the heat from the lower inverter may lead to temperature rise and
breakdown of the higher inverter. Please ensure that the heat generated by the lower inverter does not affect the
one above by installing a mechanical separation or similar (e.g. guide plate between the inverters as shown in the
figure below right).
Inverter
Horizontal mounting
When mounting several inverters in the same cabinet, design the cabinet so that the temperature inside the
cabinet does not exceed the allowable specific range for the inverter (by using increased ventilation and/or
enlarging the size of cabinet etc.)
Ventilation fan
Inverter
(Acceptable)
Position of ventilation fan
Inverter
Enclosure
Installation and Wiring
Ventilation fan
Inverter
(Unacceptable)
Inverter
Guide
Plate
Inverter
Enclosure
Vertical mounting
2-3
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