Switching The Motor Power Supply From Drive To Direct-On-Line; Switching The Motor Power Supply From Direct-On-Line To Drive; Protecting The Contacts Of Relay Outputs - ABB ACQ580-04 Hardware Manual

Switching the motor power supply from drive to direct-on-line

1. Stop the drive and the motor with the drive control panel stop key (drive in the local
control mode) or external stop signal (drive in the remote control mode).
2. Open the main contactor of the drive with S11.
3. Switch the motor power supply from the drive to direct-on-line with S40.
4. Wait for 10 seconds to allow the motor magnetization to die away.
5. Start the motor with S41.

Switching the motor power supply from direct-on-line to drive

1. Stop the motor with S42.
2. Switch the motor power supply from direct-on-line to the drive with S40.
3. Close the main contactor of the drive with switch S11 (-> turn to position ST for two
seconds and leave to position 1).
4. Start the drive and the motor with the drive control panel start key (drive in the local
control mode) or the external start signal (drive in the remote control mode).

Protecting the contacts of relay outputs

Inductive loads (relays, contactors, motors) cause voltage transients when switched off.
Install the protective component as close to the inductive load as possible. Do not install
protective components at the relay outputs.
1 Relay output
2 Varistor
3 RC filter
4 Diode
Guidelines for planning the electrical installation 85
230 V AC
1
230 V AC
+ 24 V DC
2
3
4