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Du/dt filtering suppresses inverter output voltage
spikes and rapid voltage changes that stress otor
insulation.
600 690 the motor insulation system withstands Ull=2000 and At=0.e.
Random-wound and
Form-wound
420 500 the insulation system withstands Ull=1600 and At=0. Additionally, du/dt filtering reduces
capacitive leakage currents and high frequency
emission the otor cable well high frequency
losses and bearing currents the motor.2009 Hardware options 29
.
With du/dt filtering, the insulation system must withstand Ûll=1800 V.
Non-ABB 420 Insulation system must withstand Ull=1300 V. The voltage can almost
double the otor terminals, depending otor
cable properties.
U Peak line line voltage motor terminals.
With du/dt filtering, the insulation system must withstand Ûll=1300 V.
Symbol Explanation
Un Nominal mains voltage.35 times the mains network voltage
with very short rise time.
500 600 the insulation system withstands Ull=1800 du/dt filtering not required.
HXR and motors du/dt filtering with voltages over 500 V.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.
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.
600 690 Reinforced insulation system conjunction with du/dt filtering.
HXR and motors
ABB random-wound 380 690 Check motor insulation system with the motor manufacturer.
With du/dt filtering, the insulation system must withstand Ull=1600 V. interval during which line line voltage motor terminals changes from 10% 90% full voltage range.2. the motor does not fulfil the following
requirements, the lifetime the motor might shorten.2 ps, du/dt filtering not required. For information on
the construction the motor insulation, consult the
manufacturer.3 ps, du/dt filtering not required.
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.
3AFE68248531 REV 20.
At Rise time, i.
ABB form-wound 380 690 Standard insulation system.
Filter selection table for ACS800
Motor type Nominal mains Motor insulation requirement
vo|tage (UJ
ABB and 500 Standard insulation system. For
more information see the ACS800 hardware manuals
