Lenze 13.7xx Motors-Geared motors - Manual (Page 13)

Safety instructions
Safety instructions for low−voltage machines
2
l
13 BA 13.0009 − EN 2.1
Device protection
ƒ Integrated temperature sensors do not provide full protection for the machine.
– If necessary, limit the maximum current, ensure a function block interconnection
with disconnection after a few seconds of operation with I > I
r
, particularly if a
danger of blocking exists.
– Integrated overload protection does not protect against overloading under all
conditions.
ƒ Built−in brakes are not fail−safe brakes
– Torque can be reduced.
ƒ Fuses do not protect the motor.
– Use current−dependent motor protection switches for average switching
frequency.
– Use integrated temperature sensors for high switching frequency.
ƒ Excessive torques may lead to demagnetisation or a breakage of the motor shaft.
– Never exceed the maximum torques specified in the catalogue.
ƒ Shear forces from the motor shaft are possible.
– Shafts of motor and drive machine must be exactly aligned.
Fire protection
ƒ Danger of fire
– Avoid contact with inflammable substances.
2.3 Safety instructions for low−voltage machines
in compliance with Low−Voltage Directive 73/23/EEC
General
Low−voltage machines have hazardous live and rotating parts and possibly also hot
surfaces.
Synchronous machines induce voltages at open terminals during operation.
All operations concerning transport, connections, commissioning and maintenance must
be carried out by qualified, skilled personnel (EN 50110−1 (VDE 0105−100) and IEC 60364
must be observed). Inappropriate use creates the risk of severe injury to persons and
damage to material assets.
Low−voltage machines may only be operated under the conditions that are indicated in the
section "Application as directed".
The conditions at the place of installation must comply with the data given on the
nameplate and in the documentation.