ABB ACH580 Series User Manual page 51

42
Hand Mode
When the system is in the Bypass mode, the operator can manually start the motor
by pressing the Hand key on the bypass control panel. The motor will run and Hand
is indicated on the bypass control display. In order to run the motor, the Start
Interlock(s) and Run Permissive contacts must be closed (green Enabled LED) and
any bypass fault must be reset.
Auto Mode
In the Auto mode the bypass start/stop command comes from the Start/Stop input
terminal on the bypass control board (or communication). The Auto mode is selected
by pressing the Auto key on the bypass control panel. Auto is indicated on the
bypass control display when the bypass is in the Auto mode. If the system is in the
Bypass mode, the motor will run across the line if the Auto mode is selected, the
Start/Stop, Start Interlock(s) and Run Permissive contacts are closed and any
bypass fault is reset.
Off Mode
If the motor is running in the Bypass mode, the operator can manually stop the motor
by pressing the Off/Reset key on the bypass control panel. The Hand or Auto
indication on the bypass control display will change to Off. The motor can be
restarted by pressing the Hand key or the bypass can be returned to the Auto mode
by pressing the Auto key. If the system is in the Drive mode, pressing the Off/Reset
key will take the bypass out of the Auto mode, but will not affect motor operation
from the drive. If the system is switched to the Bypass mode, a motor that is running
will stop.
Bypass/Drive Mode transfers
If the drive is in the Auto mode and the motor is running in the Drive mode, the motor
will transfer to bypass operation and continue running if the system is switched to the
Bypass mode and the bypass is in the Auto mode with the Start/Stop Input contact
closed. If the motor is running in the Bypass mode, the motor will transfer to drive
operation and continue running if the system is switched to the Drive mode and the
drive is in the Auto mode with the Start/Stop Input contact closed.
Starting the motor on application of power
If the Start Interlock(s) and Run Permissive Input contacts are closed (Start
command must also be present in Auto) and the system is in the Bypass mode and
in either the Hand or Auto mode, the motor will start across the line as soon as
power is applied. If the system is in the Drive mode with the drive in the Auto mode,
the motor will start on the drive as soon as power is applied.
Automatic transfer feature
When the Automatic Transfer feature is selected, the system switches to Bypass
mode and the motor is automatically transferred to line power if the drive trips out on
a protective trip. If automatic restart has been enabled in the drive, the drive will
attempt to automatically restart before the motor is transferred to line power. The
Automatic Transfer function can be enabled through the bypass control panel. The
Automatic Transfer indication is provided on the bypass control panel. The control
panel display will continuously flash a warning to indicate the system has
automatically transferred to Bypass. The bypass event log will also record this event.
E-Clipse bypass functions overview
ACH580 E-Clipse bypass and packaged drive user manual