B&R ACOPOSinverter P84, User Manual

Page: 100 / 405

Programming guidelines
100 ACOPOSinverter P84 User's Manual 2.10
2.5.7 Test on a low power motor or without a motor:
• According to the factory setting, the function for the detection of output phase losses
[output phase loss] (OPL) is activated (OPL = YES), see "THERM. MOTOR PROTECTION (tHt) and
LOSS OF MOTOR PHASE (OPL)" on page 292 . To test the inverter in a test or maintenance environment,
without having to convert a motor with the same rated power as the inverter (especially useful with high-
performance converters), disable [output phase loss] (OPL = no)
•
Set
[motor control type]
(Ctt) =
[U/F Reg 2P]
(UF2) or
[U/F Reg 5P]
(UF5) (menu
[DRIVE DATA]
(drC-) ,
see "Drive parameters (Ctt)" on page 153 )
Caution!
ACCIDENTAL OPERATION OF DEVICE
There is no thermal protection of the motor by the inverter when the motor rating is 20% lower than
the inverter rating. Provide an alternative means of thermal protection.
Failure to follow this instruction can result in equipment damage.
2.5.8 The use of motors connected in parallel
•
Set
[motor control type]
(Ctt) =
[U/F Reg 2P]
(UF2) or
[U/F Reg 5P]
(UF5) (menu
[DRIVE DATA]
(drC-) ).
Caution!
BE CAREFUL OF ACCIDENTAL DEVICE OPERATION
The thermal motor protection is no longer provided by the frequency inverter. Therefore, an alternative
method must be provided for the protection of the individual motor.
Failure to follow this instruction can result in equipment damage.
2.5.9 Motor with a lower rated voltage than the power supply of the inverter
•
Set
[Vector control 2pt]
(VC2) =
[Yes]
(YES) (menu
[DRIVE DATA]
(drC-) , see "Drive parameters (U0
- F5)" on page 154 )
Caution!
ACCIDENTAL OPERATION OF DEVICE
•
To protect a motor with a rated voltage under the supply voltage of the inverter, the function
[Vector control 2pt] (VC2) must be used to keep the maximum voltage of the motor below the
mains voltage.
•
Nevertheless, it must be ensured that the moment voltage supplied to the motor (connection
to the DC bus voltage) is compatible with its characteristic.
Failure to observe these instructions can result in damage to property.