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■Magnetic contactor in the secondary circuit
A magnetic contactor may be installed on the secondary side to switch controlled motors or supply commercial power to the load when the inverter is out of operation.
Notes on wiring
•Be sure to interlock the magnetic contactor on the secondary side with the power supply to prevent commercial power from being applied to the inverter output terminals.
•When installing a magnetic contactor (MC) between the inverter and the motor, avoid turning the magnetic contactor on or off during operation. Turning the magnetic contactor on or off during operation causes a current to rush into the inverter which could lead to malfunction.
10.3Installation of an overload relay
1)The
In the following cases, however, an overload relay suitable for the adjustment of the motor electronic thermal protection level (VJT) and appropriate to the motor used should be installed between the inverter and the motor.
•When using a motor with a current rating different to that of the corresponding Toshiba
•When operating a single motor with an output smaller than that of the applicable standard motor or more than one motor simultaneously.
2)When using the
3)It is recommended to use a motor with a thermal relay embedded in the motor coil to give sufficient protection to the motor, especially when it runs in a
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