Lenze 13.750 Three-phase AC motors - Manual (Page 13)

ASPL 13.1001 DE/EN/FR/IT/ES 1.0
13
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KFZ_Zeichen_EN-verdrahtung-bremse-AC-Mot-LKA
Operation on the frequency inverter
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Note!
A label in the terminal box shows the limit values of the
voltages for your motor.
ƒ During operation of the motors on the frequency inverter or during switching
operation on the mains
voltage peaks can occur, which can damage the motor insulation.
ƒ In order to avoid malfunctions, the limit values specified
in the table must not be exceeded:
Application of the motor on the Limit values for voltage peaks
Max. amplitude
û [kV]
Max. rate of rise
du/dt [kV/μs]
Frequency inverter,
single-phase
0.75
5
Frequency inverter, three-phase 1.5
Mains (switching operation) 0.75
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Tip!
ƒ For switching operation on the mains you can limit the voltage peaks by
means of a suppressor circuit with RC elements or varistors (not included
in the scope of supply).
ƒ Dimension the suppressor circuit for the respective application case!