ABB ACS880-04F-504A-3, Hardware Manual

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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 an ATEX-certified motor thermal protection
With Q971, the drive provides ATEX-certified safe motor disconnection without
contactor using the drive Safe torque off function. To implement the thermal protection
of a motor in explosive atmosphere (Ex motor), you must also:
• use an ATEX-certified Ex motor
• order an ATEX-certified thermistor protection module for the drive (L537),
or acquire and install an ATEX-compliant protection relay
• do the necessary connections.
For more information, see:
Manual code
(English) User's manual
3AUA0000132231 ATEX-certified Safe disconnection function, Ex II (2) GD for ACS880 drives (+Q971)
application guide
3AXD50000027782 FPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option
+L537+Q971) for ACS880 drives user's manual
Implementing the power loss ride-through function
If the incoming supply voltage is cut off, the drive will continue to operate by utilizing
the kinetic energy of the rotating motor. The drive will be fully operational as long as
the motor rotates and generates energy to the drive.
If you equip the drive with a main contactor or breaker, make sure that it restores the
drive input power after a short break. The contactor must either re-connect after the
break automatically, or remain closed over the break. Depending on the contactor
control circuit design, this can require an additional hold circuit, uninterruptible auxiliary
power supply or auxiliary power supply buffering.
Note: If the power loss lasts so long that the drive trips on undervoltage, a fault reset
and a fresh start command is required to continue operation.
Implement the power-loss ride-through function as follows:
Guidelines for planning the electrical installation 79