ACQ550-U1 User’s Manual 279
Technical data
Motor connections
WARNING! Never connect line power to the drive output terminals: U2, V2 or W2.
Line voltage applied to the output can result in permanent damage to the drive. If
frequent bypassing is required, use mechanically interlocked switches or contactors.
WARNING! Do not connect any motor with a nominal voltage less than one half of
the drive’s nominal input voltage.
WARNING! Disconnect the drive before conducting any voltage tolerance (Hi-Pot)
test or insulation resistance (Megger) test on the motor or motor cables. Do not
conduct these tests on the drive.
Motor connection specifications
Motor cable lengths
Maximum motor cable lengths for 400 V and 600 V drives are given in the sections
below.
In multimotor systems, the calculated sum of all motor cable lengths must not
exceed the maximum motor cable length given in the appropriate table below.
Motor connection specifications
Voltage (U
2
) 0…U
1
, 3-phase symmetrical, U
max
at the field weakening point
Frequency 0…500 Hz
Frequency resolution 0.01 Hz
Current See section Ratings on page 267.
Field weakening point 10…500 Hz
Switching frequency
Selectable. See the availability in the table below.
Cable temperature rating 90 °C (194 °F) rating minimum.
Maximum motor cable
length
See section Motor cable lengths on page 279.
1, 2, 4 and 8 kHz 12 kHz
208…240 V All types Frame sizes R1…R4 in scalar
control mode
380…480 V All types Frame sizes R1…R4 (except
ACQ550-01-097A-4) in scalar
control mode
500…600 V All types Frame sizes R2…R4 in scalar
control mode
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