SEW-Eurodrive EDR200, Руководство по эксплуатации, Страница: 96 / 272

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Operating modes and limit values
Inverter operation
Operating Instructions – EDR..71 – 315, EDRN63 – 315
96
SEW-EURODRIVE frequency inverters
When using frequency inverters from SEW‑EURODRIVE at line voltages of up to
500 V and in non-regenerative operation, the maximally permitted limit values of the
motors are met.
The pulse voltage at the motor terminals (caused by reflections) depends among oth-
ers on the level of the DC link voltage and the cable length between frequency inverter
and motor.
If regenerative operation cannot be ruled out, a braking resistor must be configured
and connected to the frequency inverter to avoid an increased DC link voltage.
Energy recovery
The regenerative power supply module of MOVIDRIVE
®
or MOVIAXIS
®
can be used
with the necessary options without restrictions. The regenerative power supply unit
prevents high DC link voltages and ensures that the limit values are not exceeded.
Frequency inverters from third party manufacturers
If the maximum permitted limit values cannot be met with frequency inverters from
other manufacturers, you must take limiting measures. Contact the manufacturer of
the frequency inverter for more information.
IT system
In an IT system, an insulation fault between a phase and ground is tolerated. The
ground fault on the motor could mean that the maximum permitted limit value for
phase/ground of 1200 V is exceeded in regenerative operation. To prevent this effect-
ively, you have to install suitable protection elements between the frequency inverter
and the motor. Usually, sine filters are installed between the frequency inverter and
motor in this case. For detailed information about component selection and wiring,
please contact the manufacturer of the frequency inverter.
25896334/EN – 06/2019