Lenze MDFQA Operating Instructions - Manual (Page 11)

Safety instructions
Residual hazards
2
EN
11 Lenze ¯ BA 33.0006 ¯ 3.0
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.
¯ Too high torques cause a fraction of the motor shaft.
– The maximum torques according to catalogue must not be exceeded.
¯ Lateral forces from the motor shaft may occur.
– Align shafts of motor and driving machine exactly to each other.
¯ 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.
Fire protection
¯ Fire hazard
– Prevent contact with flammable substances.