Manual code
(English)
User's manual
3AXD50000030058
CPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option
+L537+Q971) user's manual
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 Power-loss ride-through function
See the firmware 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, or scalar control mode
selected, open the contactor as follows:
1. Give a stop command to the drive.
2. Open the contactor.
WARNING!
When the vector control mode is in use, never open the output contactor while
the drive controls the motor. The vector control operates extremely fast, much
faster than it takes for the contactor to open its contacts. When the contactor starts
opening while the drive controls the motor, the vector control will try to maintain
the load current by immediately increasing the drive output voltage to the
maximum. This will damage, or even burn, the contactor completely.
Protecting the contacts of relay outputs
Inductive loads (relays, contactors, motors) cause voltage transients when switched off.
Guidelines for planning the electrical installation 109
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