Unidrive M/HS Frame 5 to 6 Power Installation Guide 37
Issue Number: 9
Safety information Product information
Mechanical installation
Electrical installation Technical data UL listing information
3.8 Enclosing standard drive for high environmental protection
An explanation of environmental protection rating is provided in section 5.1.10 IP / UL Rating on
page 92.
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 (NEMA 12) at the rear
of the heatsink for through-panel mounting (some current derating is required). Refer to Chapter
5 Technical data on page 82.
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 gaskets provided.
Figure 3-13 Example of IP65 (NEMA 12) through-panel layout
The main gasket should be installed as shown in Figure 3-14.
On drive size 5 in order to achieve the high IP rating at the rear of the heatsink it is necessary to seal
a heatsink vent by installing the high IP insert as shown in Figure 3-16 on page 39.
The heatsink fans have conformal coated PCBs and have sealant at cable entry points.
This means that the electronics of the fan are rated to IP54. Dripping, splashing or sprayed
water can impede the operation of the fan, therefore if the environment is such that the fan
may be subjected to more than occasional dripping or sprayed water while operational,
then suitable drip protection covers should be employed
IP20
(NEMA1)
IP65 (sizes 3 to 4)(NEMA 12) enclosure
Drive with
high IP insert
installed
Gasket
seal
To Next Page
Loading...
