SIGMATEK 074.00660, Power Installation Manual

Page: 31 / 98

Sigmatek FDD Sizes 7 to 9 Power Installation Guide
31
Safety i
nformati
on
P
roduct
in
fo
rmati
on
Me
ch
an
ic
al
in
st
al
la
tio
n
E
le
ctri
cal
installa
tion
Te
chn
ical
d
ata
UL
li
sti
ng
in
fo
rm
at
ion
3.8 Enclosing standard drive for high environmental protection
An explanation of environmental protection rating is provided in section 5.1.9 IP / UL Rating on
page 83.
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 IP65 rating (size 7 and 8) or IP55
(size 9) (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 a high IP 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 gasket and securing brackets provided.
The main gasket should be installed as shown in Figure 3-13.
Figure 3-13 Installing the gasket
Drive
Gas k et
Enc l osure
rear wa ll