ABB ACS580-04 - Example Bypass Connection; Implementing a Bypass Connection

Implementing a bypass connection
If bypassing is required, employ mechanically or electrically interlocked contactors
between the motor and the drive and between the motor and the power line. Make
sure with interlocking that the contactors cannot be closed simultaneously. The
installation must be clearly marked as defined in IEC/EN/UL 61800-5-1, subclause
6.5.3, for example, “THIS MACHINE STARTS AUTOMATICALLY”.
WARNING!
Never connect the drive output to the electrical power network. The connection
may damage the drive.
￭ 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
96 Guidelines for planning the electrical installation