ABB ACH580-31, Руководство по оборудованию

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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 (option
+L537), or acquire and install an ATEX-compliant protection relay
• do the necessary connections.
For more information, see:
Manual code
(English) User's manual
3AXD50000030058 CPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option
+L537+Q971) user's manual
Controlling a contactor between drive and motor
The control of the output contactor depends on how you use the drive, that is,
which motor control mode and which motor stop mode you select.
If you have the vector control mode and motor ramp stop selected, open the
contactor as follows:
1. Give a stop command to the drive.
2. Wait until the drive decelerates the motor to zero speed.
3. Open the contactor.
If you have the vector control mode and motor coast stop selected, or scalar control
mode selected, open the contactor as follows:
1. Give a stop command to the drive.
2. Open the contactor.
84 Guidelines for planning the electrical installation