ABB ACQ810-04, Hardware Manual, Page: 60 / 144

60 Planning the electrical installation
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. Ensure with
interlocking that the contactors cannot be closed simultaneously.
WARNING! Never connect the supply power to the drive output terminals U2, V2
and W2. Line voltage applied to the output can result in permanent damage to
the unit.
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Example bypass connection
An example bypass connection is shown below.
Switch Description
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