Residual Hazards - Lenze 9400 E94ASHE Série Instructions De Montage

2 Safety instructions

Residual hazards

2.2 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, -UG, Rb1 and Rb2 carry hazardous
voltages for at least 3 minutes after mains disconnection.
– because the power terminals L1, L2, L3; U, V, W, +UG, -UG, Rb1 and Rb2 carry
hazardous voltages when the motor is stopped.
Device protection
Plug on or pull off all pluggable terminals only in deenergised condition!
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Detach the controllers from their installation backplanes only in deenergised
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condition!
Cyclically switching on and off of the mains voltage can overload and destroy the
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input current limitation of the controller:
– In the case of cyclic mains switching for a longer time period, allow at least one
minute between two switch-on actions!
Motor protection
Depending on the controller settings, the connected motor can be overheated by:
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– 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
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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.
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EDK94ASH24 DE/EN/FR/ES/IT 3.1