Residual Hazards; Motor Protection - Lenze 9400 E94 MHE Série Instructions De Montage

Waste disposal
Recycle metal and plastic materials. Assembled PCBs must be disposed of professionally.
The product−specific safety and application notes given in these instructions must be
observed!
3.2

Residual hazards

Protection of persons
Before starting work on the controller, check that the power terminals are
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deenergised
– because the power terminals U, V, W, +UG and −UG carry hazardous voltages for at
least 3 minutes after mains disconnection.
– because the power terminals U, V, W, +UG and −UG carry hazardous voltages when
the motor is stopped.
Device protection
Plug on or pull off all pluggable terminals only in deenergised condition!
ƒ
Detach the controllers only in deenergised conditions from their installation
ƒ
backplanes or the back panel of the control cabinet!
Cyclic switching on and off of the mains voltage can overload and destroy the input
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current limitation of the controller:
– Cyclic mains switching of 5−times in 5 minutes is permissible without restrictions.

Motor protection

Depending on the controller settings, the connected motor can be overheated by:
ƒ
– For instance, longer DC−braking operations.
– Longer operation of self−ventilated motors at low speed.
Protection of the machine/system
Drives can reach dangerous overspeeds (e.g. setting of high output frequencies in
ƒ
connection with motors and machines unsuitable for such conditions):
– The controllers do not offer any protection against such operating conditions. Use
additional components for this purpose.
EDK94AMH24 DE/EN/FR/ES/IT 6.0
Safety instructions
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Residual hazards
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