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CAUTION: Do not stop operation by switching OFF electromagnetic contactors on the primary or secondary sides of the inverter.
Ground fault
interrupter
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Input |
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| L1, L2, L3 |
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| U, V, W | |||
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| Motor |
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| Inverter | |||||
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| P24 | |||
FW
When there has been a sudden power failure while an operation instruction is active, then the unit may restart operation automatically after the power failure has ended. If there is a possibility that such an occurrence may harm humans, then install an electromagnetic contactor (Mgo) on the power supply side, so that the circuit does not allow automatic restarting after the power supply recovers. If the optional remote operator is used and the retry function has been selected, this will also cause automatic restarting when a Run command is active. So, please be careful.
CAUTION: Do not insert leading power factor capacitors or surge absorbers between the output terminals of the inverter and motor.
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| Ground fault | Surge absorber | ||||||||||||||||||||||
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| interrupter | ||||||||||||||||||||||
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| Input |
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| L1, L2, L3 |
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| Inverter |
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| Motor | |||||||||
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| GND lug |
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| Leading power | |||||||||||
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| factor capacitor | ||||||||||||
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In a system using an inverter with the voltage control PWM system, a voltage surge caused by the cable constants such as the cable length (especially when the distance between the motor and inverter is 10 m or more) and cabling method may occur at the motor terminals. A dedicated filter of the 400 V class for suppressing this voltage surge is available. Be sure to install a filter in this situation.