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10.2 Installation of a magnetic contactor
If using the inverter without installing a magnetic contactor (MC) in the primary circuit, use an MCCB (with a power cutoff device) to open the primary circuit when the inverter protective circuit is activated.
■Magnetic contactor in the primary circuit
To detach the inverter from the power supply in any of the following cases, insert a magnetic contactor
(1)If the motor overload relay is tripped
(2)If the protective detector (FL) built into the inverter is activated
(3)In the event of a power failure (for prevention of
When using the inverter with no magnetic contactor (MC) on the primary side, install a
10
Example of connection of a magnetic contactor in the primary circuit
Notes on wiring
•When frequently switching between start and stop, do not use the magnetic contactor on the primary side as an
Instead, stop and start the inverter by using terminals F and CC (forward run) or R and CC (reverse run).
•Be sure to attach a surge killer to the exciting coil of the magnetic contactor (MC).