Toshiba Q7 Installation And Operation Manual page 18

OCP Setting
There are two operating modes for the motor: ASD-driven and Bypass. When the motor is being driven
by the ASD, overcurrent protection and extended overload protection is accomplished via the Electronic
Thermal Protection setting of the ASD. Set this parameter as a ratio of the FLA of the ASD to the FLA
of the motor.
When operating in the Bypass mode, the OCP setting should allow for the high inrush current of startup
and the short-time overload current of high-inertia loads and not be set so high as to provide inadequate
overcurrent protection. The OCP should be set to a level that is just above the maximum level of the
application's requirements.
For large motor applications, a motor starter is recommended.
Figure 5. Motor OCP Adjustment and OCP Contactor.
Set to minimum at the
factory. Application-
specific adjustment is
required.
12
Normally Open (NO)
contacts are unused. NO
contacts may be used with
ancillary circuit to annunciate
an overload trip.
NC contacts are closed
during normal operation.
The NC contacts open
during an overload trip.
Q7 ASD Installation and Operation Manual