ABB ACS880-14 - Example Bypass Connection; Switching the Motor Power Supply from Drive to Direct-On-Line

￭ Example bypass connection
An example bypass connection is shown below.
Drive main switchQ1
Bypass circuit breakerQ4
Drive main contactorK1
Bypass contactorK4
Drive output contactorK5
Drive main contactor on/off controlS11
Motor power supply selection (drive or direct-on-line)S40
Start when motor is connected direct-on-lineS41
Stop when motor is connected direct-on-lineS42
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 the 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 dissipate.
5. Start the motor with S41.
96 Guidelines for planning the electrical installation