OPERATION AND MAINTENANCE MANUAL
MAC QM MOTORS
PAGE: 26
CODE: CTT42 EDITION: 01 RELEASE: JULY 2016
Subject to technical changes without prior notice
3.7.3
Power-supply conditions
MAC QM motors motors are designed to work with a power supply via frequency converters and they can withstand BUS DC
voltages (after rectifying the mains voltage) of up to 700 VDC (500 VAC).
With regard to admissible voltage surges, MAC QM motors can withstand the Impulse Voltage Insulation Class IVIC C/B
according to the IEC 60034-18-42:
Impulse insulation
class
Maximum allowable peak/peak operating voltages
Phase / phase
C
Phase / Ground
B
IVIC C/B
5,9 [U
N
]
3,1 [U
N
]
Table 19: Maximum allowable operating voltage at machine terminals
Furthermore, the drive switching frequency connected to a MAC QM motor must be at least as summarised in the following table:
Power
Maximum speed
Switching frequency
P > 150 kW
<1500 rpm
2 kHz
Table 20: Admissible switching frequency
Otherwise, the rated features of the motor, shown on its nameplate, must be derated. Please check with VASCAT to determine
the resulting values.
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