Lenze GSS - Manual (Page 13)

Safety instructions
Residual hazards
2
l
13 BA 12.0023−EN 7.0
2.4 Residual hazards
Protection of persons
ƒ The motor surfaces can become very hot. Danger of burns when touching!
– Provide protection against accidental contact, if necessary.
ƒ High−frequency voltages can be capacitively transferred to the motor housing
through the inverter supply.
– Carefully earth the motor housing.
ƒ Danger of unintentional starting or electrical shocks
– Connections must only be made when the equipment is deenergised and the
motor is at standstill.
– Built−in brakes are not fail−safe brakes.
Motor protection
ƒ Integrated temperature sensors do not provide full protection for the machine.
– Limit the maximum current if necessary. Select parameter settings for the
controller which ensure a switch−off if operated at I > I
r
after a couple of seconds,
particularly if a danger of blocking exists.
– The integrated overload protection function does not prevent overloading under
all circumstances.
ƒ Built−in brakes are not fail−safe brakes .
– Torque reduction is possible through disruptive factors which cannot be
influenced, e.g. through oil ingress due to a defective shaft sealing ring at the A
end.
ƒ Fuses do not protect the motor.
– Use current−dependent motor protection switches for average operating
frequency.
– Use built−in thermal detectors at high operating frequency.
ƒ Excessive torques lead to a break of the motor shaft or demagnetisation.
– Do not exceed the maximum torques according to the catalogue.
ƒ Lateral forces from the motor shaft are possible.
– Perfectly align shafts of motor and driving machine to each other.
ƒ 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
ƒ Fire hazard
– Avoid contact with inflammable substances.