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the motor does not fulfil the following
requirements, the lifetime the motor might shorten.
Du/dt filtering suppresses inverter output voltage
spikes and rapid voltage changes that stress otor
insulation.
HXR and motors du/dt filtering with voltages over 500 V.35 times the mains network voltage
with very short rise time. Additionally, du/dt filtering reduces
capacitive leakage currents and high frequency
emission the otor cable well high frequency
losses and bearing currents the motor.
W hen needed? The need for du/dt filtering
depends the motor insulation.
M3 motors 500 600 Standard insulation system conjunction with du/dt filtering reinforced insulation.
Non-ABB 420 Insulation system must withstand Ull=1300 V.e.
600 690 Reinforced insulation system conjunction with du/dt filtering.
U Peak line line voltage motor terminals.
Filter selection table for ACS800
Motor type Nominal mains Motor insulation requirement
vo|tage (UJ
ABB and 500 Standard insulation system.
600 690 the motor insulation system withstands Ull=2000 and At=0. For
more information see the ACS800 hardware manuals.
With du/dt filtering, the insulation system must withstand Ûll=1800 V.
HXR and motors
ABB random-wound 380 690 Check motor insulation system with the motor manufacturer.
500 600 the insulation system withstands Ull=1800 du/dt filtering not required.
3AFE68248531 REV 20.3 ps, du/dt filtering not required.2 ps, du/dt filtering not required.2.
With du/dt filtering, the insulation system must withstand Ull=1600 V.
With du/dt filtering, the insulation system must withstand Ûll=1300 V.
Symbol Explanation
Un Nominal mains voltage.
At Rise time, i. The voltage can almost
double the otor terminals, depending otor
cable properties. For information on
the construction the motor insulation, consult the
manufacturer.Du/dt filters
As with all frequency converters employing the most
m odern inverter technology, the ACS800 output
comprises regardless output frequency pulses of
approximately 1. interval during which line line voltage motor terminals changes from 10% 90% full voltage range.
ABB form-wound 380 690 Standard insulation system.
Insulated N-end (non-driven end) bearings and or
com ode filters are also required for motor
bearing currents with motors bigger than 100 kW.2009 Hardware options 29
.
Random-wound and
Form-wound
420 500 the insulation system withstands Ull=1600 and At=0
