Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 74 / 608

Connection of stand-alone option units Wiring
3 - 38
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When the power supply is 400 V 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 mo-
tor are at a stop. When the magnetic contactor is turned on while the inverter is operating, overcur-
rent protection of the inverter and such will activate. When an MC is provided for switching to the
commercial power supply, for example, switch it on/off after the inverter and motor have stopped.
Example
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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. 3-30: Example for connection of an inverter
Power
supply
Inverter
To the
motor
Operation preparation
OFF ON
Stop
Start/Stop Operation
Start
T
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