Wiring Connection of stand-alone option units
FR-E700 EC 3 - 27
When the power supply is 400V class, install a step-down transformer.
쑶
Handling of the inverter output side magnetic contactor
Switch the magnetic contactor between the inverter and motor only when both the inverter and
motor are at a stop. When the magnetic contactor is turned on while the inverter is operating,
overcurrent protection of the inverter and such will activate. When an MC is provided for switch-
ing to the commercial power supply, for example, switch it on/off after the inverter and motor
have stopped.
Example 쑴
As shown below, always use the start signal (ON or OFF across terminals STF or STR-PC)
to make a start or stop. (Refer to section 6.10.4.)
I001922E
Fig. 3-17: Start and stop of the inverter
Power
supply
Inverter
To the
motor
Operation preparation
OFF ON
Stop
Start/Stopp Operation
Start
T
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