
Installation requirements
Any installation, maintenance and
inspection must be carried out by
trained persons.
WARNING
Sharp element
Death or serious personal injury
‐Use safety knives and protective
gloves when unpacking the
product.
WARNING
Lifting hazard
Death or serious personal injury
‐Use proper lifting equipment when
handling the product.
‐Follow local regulations.
WARNING
Electric shock
Death or serious personal injury
‐Before starting any work on the
product, make sure that the power
supply has been switched off at
least for as long as stated below
and that it cannot be accidentally
switched on.
‐Touching the electrical parts may
be fatal, even after CUE has been
switched off.
Safety regulations
• The OFF button of the operating panel does not disconnect
CUE from the power supply and must therefore not be used as
a safety switch.
• CUE must be earthed correctly and protected against indirect
contact according to local regulations.
• The leakage current to protective earth exceeds 3.5 mA.
• Enclosure class IP20/21 must not be installed freely accessible,
but only in a panel.
• Enclosure class IP54/55 must not be installed outdoors without
additional protection against weather conditions and the sun.
• The STO function does not disconnect CUE from the power
supply and must therefore not be used as a safety switch.
• The STO function does not prevent unwanted movement from
external forces on the motor, for example, back pressure, and
the motor shaft must be covered.
Always observe local regulations concerning cable cross-section,
short-circuit protection and overcurrent protection.
The general safety necessitates special considerations as to these
aspects:
• fuses and switches for overcurrent and short-circuit protection
• selection of cables (mains current, motor, load distribution and
relay)
• net configuration (IT, TN, earthing)
• safety on connecting inputs and outputs (PELV).
IT mains
Do not connect 380-500 V CUE
frequency converters to mains
supplies with a voltage between phase
and protective earth of more than 440
V.
In connection with IT mains and earthed delta mains, the mains
voltage may exceed 440 V between phase and protective earth.
Aggressive environment
CUE must not be installed in an
environment where the air contains
liquids, particles or gases which may
affect and damage the electronic
components.
CUE contains a large number of mechanical and electronic
components. They are all vulnerable to environmental impact.
Reduction at low air pressure
At altitudes above 2000 m (6600 ft),
the PELV requirements cannot be met.
PELV = Protective Extra Low Voltage.
At low air pressure, the cooling capacity of air is reduced, and CUE
automatically reduces the performance to prevent overload.
It may be necessary to select a CUE unit with a higher
performance.
Mechanical installation
The individual CUE cabinet sizes are characterised by their
enclosures. The table in the technical data section shows the
relationship between the enclosure class and enclosure type.
Enclosure types
Products with integrated STO function must be installed in an IP54
cabinet according to IEC 60529 or in an equivalent environment. In
special applications, a higher IP degree may be necessary.
Space requirements and air circulation
The CUE units can be mounted side by side, but as sufficient air
circulation is required for cooling, these requirements must be met:
• Sufficient free space above and below the CUE cabinet. See the
table below.
• Ambient temperature up to 50 °C (122 °F).
• The CUE cabinet must be hung directly on the wall or fitted with
a back plate.
TM038859
CUE hung directly on the wall or fitted with a back plate
Required free space above and below the CUE cabinet:
Enclosure Space [mm (in)]
A2, A3, A4, A5 100 (3.9)
B1, B2, B3, B4, C1, C3 200 (7.9)
C2, C4, D1h, D2h, D5h, D7h 225 (8.9)
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English (GB)