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Electrical
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Unidrive SPM User Guide
33
Issue Number: 3 www.controltechniques.com
5 Mechanical Installation
This chapter describes all the mechanical details required to install the
drive. The drive is intended to be installed in an enclosure. Key features
of this chapter include:
•
Surface and through-panel mounting
•
Remote mounting of control master pod
•
Enclosure sizing and layout
•
Solutions Module installation
•
Terminal location and torque settings
•
Docking the Unidrive SPMD and SPMC/U
5.1 Safety information
5.2 Planning the installation
The following considerations must be made when planning the
installation:
5.2.1 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, please refer to section 5.10
Enclosing drive for
high environmental protection
on page 56.
5.2.2 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
5.2.3 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, please refer to section 5.8.4
Enclosure sizing
on
page 51.
5.2.4 Electrical safety
The installation must be safe under normal and fault conditions.
Electrical installation instructions are given in Chapter 6
Electrical
Installation on page 64
.
5.2.5 Fire protection
The drive enclosure is not classified as a fire enclosure. A separate fire
enclosure must be provided.
5.2.6 Electromagnetic compatibility
Variable speed drives are powerful electronic circuits which can cause
electromagnetic interference if not installed correctly with careful
attention to the layout of the wiring.
Some simple routine precautions can prevent disturbance to typical
industrial control equipment.
If it is necessary to meet strict emission limits, or if it is known that
electromagnetically sensitive equipment is located nearby, then full
precautions must be observed. In-built into the drive, is an internal EMC
filter, which reduces emissions under certain conditions. If these
conditions are exceeded, then the use of an external EMC filter may be
required at the drive inputs, which must be located very close to the
drives. Space must be made available for the filters and allowance made
for carefully segregated wiring. Both levels of precautions are covered in
section 6.13
EMC (Electromagnetic compatibility) on page 79
.
5.2.7 Hazardous areas
The drive must not be located in a classified hazardous area unless it is
installed in an approved enclosure and the installation is certified.
5.3 Terminal cover removal
5.3.1 Removing the terminal covers
Unidrive SPMA and SPMD are fitted with three terminal covers: Control,
input and output terminal covers.
Unidrive SPM/C are fitted with two terminal covers: Input and output
terminal covers. For the dual SPMC/U rectifier, the terminal covers and
housing must be removed to gain access to all the terminals.
Follow the instructions
The mechanical and electrical installation instructions must
be adhered to. Any questions or doubt should be referred to
the supplier of the equipment. It is the responsibility of the
owner or user to ensure that the installation of the drive and
any external option unit, and the way in which they are
operated and maintained, comply with the requirements of
the Health and Safety at Work Act in the United Kingdom or
applicable legislation and regulations and codes of practice in
the country in which the equipment is used.
Competence of the installer
The drive must be installed by professional assemblers who
are familiar with the requirements for safety and EMC. The
assembler is responsible for ensuring that the end product or
system complies with all the relevant laws in the country
where it is to be used.
Lifting the drive
The weights of the drives are as follows:
SPMA 80kg (176.4lb)
SPMD 42kg (92.6lb)
SPMC/U20kg (44lb)
Use appropriate safeguards when lifting these models.
WARNING
WARNING
WARNING
Isolation device
The AC supply must be disconnected from the drive using an
approved isolation device before any cover is removed from
the drive or before any servicing work is performed.
Stored charge
The drive contains capacitors that remain charged to a
potentially lethal voltage after the AC supply has been
disconnected. If the drive has been energized, the AC
supply must be isolated at least ten minutes before work
may continue.
Normally, the capacitors are discharged by an internal
resistor. Under certain, unusual fault conditions, it is possible
that the capacitors may fail to discharge, or be prevented
from being discharged by a voltage applied to the output
terminals. If the drive has failed in a manner that causes the
display to go blank immediately, it is possible the capacitors
will not be discharged. In this case, consult Control
Techniques or their authorized distributor.
WARNING
WARNING
