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56
Unidrive SPM User Guide
www.controltechniques.com Issue Number: 3
5.10 Enclosing drive for high
environmental protection
An explanation of IP Rating is provided in section 14.1.10
IP Rating
(Ingress Protection)
on page 267.
The standard drive is rated to IP20 pollution degree 2 (dry, non-
conductive contamination only) (NEMA 1). However, it is possible to
configure the drive to achieve IP54 rating (NEMA 12) at the rear of the
heatsink for through-panel mounting.
This allows the front of the drive, along with various switchgear, to be
housed in an IP54 (NEMA 12) enclosure with the heatsink protruding
through the panel to the external environment. Thus, the majority of the
heat generated by the drive is dissipated outside the enclosure
maintaining a reduced temperature inside the enclosure. This also relies
on a good seal being made between the heatsink and the rear of the
enclosure using the gaskets provided.
Figure 5-39 Example of IP54 (NEMA 12) through-panel layout
The main gasket should be installed as shown in Figure 5-39. Any
screws / bolts that are used for mounting should be installed with the
nylon washers provided in the kit box to maintain a seal around the
screw hole. See Figure 5-40.
IP20
(NEMA1)
IP54 (NEMA 12)
enclosure
Drive fitted
with IP54
fan as
standard
Gasket
seal