Lenze 8400 motec - Manual (Page 179)

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05 179
5 Motor control (MCTRL)
5.14 Monitoring
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5.14.5 Mains phase failure monitoring
The drive controller has a simple mains-phase failure detection function with which a mains phase
failure can be detected under load.
• In the case of power-adapted machines, approx. 50 % of the rated motor power must be
exceeded so that a main-phase failure can be detected.
• If the mains phase failure monitoring is tripped:
• The error response set in C00565 will be carried out (Lenze setting: "Warning").
• The " Su02: Mains voltage switched-off " error message is entered into the logbook.
5.14.6 Maximum current monitoring
This function extension is only available from version 03.00.00!
The ultimate motor current to be parameterised in C00939 is a limit value to protect the motor from
destruction, influence of the rated data and demagnetisation.
• This limit value must not be travelled cyclically in the drive process.
• If the instantaneous value of the motor current exceeds the limit value set in
C00939 , the error
response "Fault" occurs to protect the motor and the error message " OC7: Motor overcurrent " is
entered into the logbook.
• The maximum currents to be parameterised in C00022 and C00023 should have a sufficient
distance to this limit value.

Stop!
Under load, the mains input of a three-phase controller can be destroyed if the device is
only supplied by two phases (e.g. if a mains phase fails).

Note!
The failure of a mains phase can also generate an error message " LU: DC-bus
undervoltage ". This error cannot be parameterised by C00565 .

Note!
If a Lenze motor is selected from the catalogue whose plant parameters are transferred
into the controller, the settings in C00022 and C00023 will automatically be adapted to
the selected motor.