ABB ACS880-37LC-0390A-7, Руководство по оборудованию, Страница: 89 / 242

Supplying power for the auxiliary circuits
Power for the auxiliary circuits and cooling fans must be supplied externally, unless the
drive has an auxiliary voltage transformer (G344) and cooling fan transformer(s)
(G451).
The user must supply these options from external power sources:
• +G300/+G301: Cabinet heaters and/or lighting
• +G307: Connection for an external uninterruptible power supply
• +G313: Power supply connection for a motor space heater output
For the voltages and fuse sizes, refer to the circuit diagrams delivered with the drive.
Using power factor compensation capacitors with the drive
Power factor compensation is not needed with AC drives. However, if a drive is to be
connected in a system with compensation capacitors installed, note the following restrictions.
WARNING!
Do not connect power factor compensation capacitors or harmonic filters to the
motor cables (between the drive and the motor). They are not meant to be used with
AC drives and can cause permanent damage to the drive or themselves.
If there are power factor compensation capacitors in parallel with the input of the drive:
1. Do not connect a high-power capacitor to the power line while the drive is connected.
The connection will cause voltage transients that may trip or even damage the drive.
2. If capacitor load is increased/decreased step by step when the AC drive is connected
to the power line, make sure that the connection steps are low enough not to cause
voltage transients that would trip the drive.
3. Make sure that the power factor compensation unit is suitable for use in systems with
AC drives, ie, harmonic generating loads. In such systems, the compensation unit
should typically be equipped with a blocking reactor or harmonic filter.
Using a safety switch between the drive and the motor
ABB recommends to install a safety switch between the permanent magnet motor and the
drive output. The switch is needed to isolate the motor from the drive during maintenance
work on the drive.
Implementing the control of a contactor between drive and
motor
Implementing the control of the output contactor depends on the motor control mode and
stopping method selected.
When you select the DTC motor control mode and the motor ramp stop mode, use this
operation sequence to open the contactor:
1. Give a stop command to the drive.
2. Wait until the drive decelerates the motor to zero speed.
3. Open the contactor.
Guidelines for planning the electrical installation 89