Safety instructions
Residual hazards
13
Lenze ¯ MA 12.0018 ¯ 4.1
Motor protection
¯
Installed thermal detectors are
no full protection
for the machine.
–
If required, limit the maximum current, parameterise the controller such that it
will be switched off after some seconds of operation with I > I
N
, especially if
there is the danger of blocking.
–
Installed overload protection does not prevent an overload under any
conditions.
¯
Installed brakes are
no fail−safe brakes
.
–
The torque can be reduced due to disruptive factors that cannot be influenced,
e.g. by ingressing oil due to a defect shaft sealing ring on the A side.
¯
Fuses are no motor protection.
–
Use current−dependent motor protection switches at average operating
frequency.
–
Use installed thermal detectors at high operating frequency.
¯
In the case of permanent−magnet motors, too high torques cause
demagnetisation.
–
The maximum torques according to catalogue must not be exceeded.
¯
If deviations from normal operation occur, e.g. increased temperature, noise,
vibration, determine the cause and, if necessary, contact the manufacturer. If in
doubt, switch off the motor.
¯
Design with plug:
–
Never disconnect plug when energised! Otherwise, the plug can be destroyed.
–
Switch off power supply and inhibit controller prior to disconnecting the plug.
Fire protection
¯
Fire hazard
–
Prevent contact with flammable substances.
