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Specification of high-performance vector convertor
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1.2.6 Voltage-sensitive parts or capacitance of improving power factor exist on output side
Output of frequency convertor is PMB wave. If capacitance of improving power factor or voltage
dependent resistor for thunder prevention is installed on output side, instantaneous over current and even
damage of frequency convertor can be caused easily. Please do not use.
1.2.7 Switching devices such as contactor for input and output terminals of frequency convertor
If contactor is installed between power and input terminal of frequency convertor, this contactor is
not allowed to control the start and stop of frequency convertor. If this contactor is required to control the
start and stop of frequency convertor, the interval should be not less than one hour. Frequent charging and
discharging will easily reduce the lifespan of capacitor within frequency convertor. If switching devices
such as contactor are installed between output terminal and motor, ensure the operation of frequency
convertor without output, otherwise module damage may occur easily.
1.2.8 Use beyond rated voltage value
It's not suitable to use this series frequency convertor beyond operating voltage range allowed by
the manual, otherwise device damage may be caused. If necessary, please use corresponding voltage
boosting or dropping equipment for voltage transformation.
1.2.9 Three-phase input changes to be two-phase input
Do not change three-phase frequency convertor to be two-phase, otherwise fault or damage may
occur.
1.2.10 Lightening impulse protection
There's lightening stroke over-current protection device in frequency convertor, so it has certain
self-protection ability for inductive thunder. If lightening stroke is frequent in the place of client,
additional protection in front of frequency convertor is essential.
1.2.11 Altitude and derating use
In the region with altitude exceeding 1,000m, the heat dissipation effect of frequency convertor
weakens due to thin air, so it's necessary to derate for use. Please contact our company for consultation.
1.2.12 About adaptive motor
1) Standard adaptive motor is four-pole squirrel-cage asynchronous induction motor. If it's not
above motor, please select frequency convertor as per rated current of motor.
2) Cooling fan and rotor spindle of non-variable frequency motor is coaxial connection. If rotation
speed reduces, cooling effect of fan will reduce, so the occasion of overheating motor should be
installed with strong exhaust fan or changed to be variable frequency motor.
3) Standard parameters of adaptive motor have been built in frequency convertor. It's necessary to
identify motor parameters or modify default value based on actual situation to conform to actual
value as far as possible, otherwise operation effect and protection performance may be affected.
4) Short circuit of cable or within motor can lead to alarm and even explosion of frequency
convertor. Please firstly conduct insulation short-circuit test for initially installed motor and cable,
and it's also essential for daily maintenance. Please completely separate frequency convertor from
tested part when conducting the test.
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