Guidelines for planning the electrical installation 65
Example bypass connection
An example bypass connection is shown below.
Switching the motor power supply from drive to direct-on-line
1. Stop the drive and the motor with the drive control panel (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 die away.
5. Start the motor with S41.
Q1 Drive main switch
Q4 Bypass circuit breaker
K1 Drive main contactor
K4 Bypass contactor
K5 Drive output contactor
S11 Drive main contactor on/off control
S40 Motor power supply selection (drive or direct-on-line)
S41 Start when motor is connected direct-on-line
S42 Stop when motor is connected direct-on-line
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