Unidrive M / HS Frame 7 to 10 Power Installation Guide 23
Safety information Product information
Mechanical installation
Electrical installation Technical data UL listing information
3.2 Planning the installation
The following considerations must be made when planning the installation:
3.2.1 Access
Access must be restricted to authorized personnel only. Safety regulations which apply at the place
of use must be complied with.
The IP (Ingress Protection) rating of the drive is installation dependent. For further information, refer
to section 3.8 Enclosing standard drive for high environmental protection on page 39.
3.2.2 Environmental protection
The drive must be protected from:
• Moisture, including dripping water or spraying water and condensation. An anti-condensation
heater may be required, which must be switched off when the drive is running.
• Contamination with electrically conductive material
• Contamination with any form of dust which may restrict the fan, or impair airflow over various
components
• Temperature beyond the specified operating and storage ranges
• Corrosive gasses
3.2.3 Cooling
The heat produced by the drive must be removed without its specified operating temperature being
exceeded. Note that a sealed enclosure gives much reduced cooling compared with a ventilated one,
and may need to be larger and/or use internal air circulating fans.
For further information, refer to section 3.5 Enclosure for standard drives on page 32.
3.2.4 Electrical safety
The installation must be safe under normal and fault conditions. Electrical installation instructions are
given in Chapter 4 Electrical installation on page 54.
3.2.5 Fire protection
The drive enclosure is not classified as a fire enclosure. A separate fire enclosure must be provided.
For installation in the USA, a NEMA 12 enclosure is suitable.
For installation outside the USA, the following (based on IEC 62109-1, standard for PV inverters) is
recommended.
Enclosure can be metal and/or polymeric, polymer must meet requirements which can be
summarized for larger enclosures as using materials meeting at least UL 94 class 5VB at the point of
minimum thickness.
Air filter assemblies to be at least class V-2.
The location and size of the bottom shall cover the area shown in Figure 3-1. Any part of the side
which is within the area traced out by the 5° angle is also considered to be part of the bottom of the
fire enclosure.
During installation it is recommended that the vents on the drive are covered to prevent
debris (e.g. wire off-cuts) from entering the drive.
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