Direct and indirect
exposure of drive to water
Dust Exposure
Mechanical Mounting
Clearance
Condensation
Enclosure type
H5
a [mm / inch]
100 / 3.94
b [mm / inch]
100 / 3.94
Drive installation
IP20 drives are intended for indoor or cabinet
mounting. Application example: drive fitted in
a machine room, basement or in an electrical
cabinet together with other electric / electronic
components such as the unit controller or
contactors.
It is recommended to place drive at least 30cm
from ground to protect against floods.
Avoid Dust forms and deposits on the surface
of the drive and inside on circuit boards and the
electronic components. These deposits act as
insulation layers and hamper heat transfer to
the ambient air, reducing the cooling capacity.
The components become warmer. This causes
accelerated aging of the electronic components,
and the service life of the unit decreases. Dust
deposits on the heat sink in the back of the unit
also decrease the service life of the unit.
The drive cooling fans have small bearings into
which dust can penetrate and act as an abrasive.
This leads to bearing damage and fan failure.
Under the conditions described above, it is
advisable to clean the frequency converter
during periodic maintenance. Remove dust off
the heat sink and fans and clean the filter mats.
For optimal cooling conditions, mount the drive
on vertical position. Allow a free air passage
above and below the frequency converter.
See Table below:
Horizontal mounting is NOT the preferred
position, however if unavoidable, lay PCB
on the left side (270°) to avoid condensation
accumulation on the electronics.
Condensation must always be avoided. There is a
specific risk of condensation when the frequency
converter or some of its components are
colder than moist ambient air. In this situation,
the moisture in the air can condense on the
electronic components.
• Operating with the frequency converter
constantly connected to the mains can help
to reduce the risk of condensation. Install a
cabinet heater in situations where there is a
real possibility of condensation due to ambient
conditions.
• If the drive is IP 20, then evaluate and prevent
possibility of condensation above drive.
Example: condensation on metallic frame above
drive, piping… If unavoidable, solutions like
cabinet heater, a pace heater, top hat on the
drive, insulation in the electric panel can be a
solution.
• Water resulting of condensation must not
accumulate on the bottom of electric panel.
Provide a drain for condensed water to run out
if necessary.
• No other forced cooling then internal drive fan.
PCB temp
dew
point
a
b
17
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