Specifications

Chapter1SafetyandNotesVFD‐G7SeriesFrequencyInverterOperationManual



500Vinsulation testerto measuretheinsulating resistance.It shouldnotbe lessthan

5MΩ.

 Motor thermal protection

Iftheratingsofthedrivenmotor arenotincompliancewiththedrive,especially,the

drive rated power more than motor rated power, be sure to adjust the protective

thresholdortoinstallthermalrelaybeforethemotortoensurethemotorisproperly

protected.

 Operate above power frequency

Thisdrivecanprovide0Hz~600Hzoutputfrequency.Iftheuserneedtorunthemotor

aboveratedfrequency,pleaseconsidertheaffordabilityofmechanicaldevices.

 The mechanical device resonance

Thedrive system mayencounter mechanicalresonancewith theload whenoperating

withincertainbandofoutputfrequency.Skipfrequencieshavebeensettoavoidit.

 Motor heat and noise

TheoutputvoltageisinPWMwavewithsomeharmonics.Therefore,temperaturerise,

noiseandvibrationofmotorarehigherthan50Hz.

 Varistors or capacitors used to improve the power factor

Don't connectany varistor or capacitor to the output terminals of the drive, because

the drive's output voltage waveform is PWM, otherwise tripping or damaging of

components may occur; in addition, don't install circuit breaker or contactor at the

outputsideofthedrive.

 Circuit breakers connected to the input/output of the drive

Ifcontactorisconnectedbetweentheinputpowersupplyandthemotor,Pleasedon’t

use contactor to control drive start‐stop. If it must be done, interval time should not

less than one‐hour. If frequently charging and discharging, the life of the internal

capacitance of the drive will be reduced.

 If circuit breaker or contactor needs to be

connectedbetweenoutput sideof thedriveand the motor,besuretooperatethese

circuitbreakers orcontactor whenthedrivehas nooutput,to avoid damagingof the

drive.

 Using outside the range of rated voltage

The drive is unsuitable to be used out of the specified range of operation voltage;