Veikong VFD500 Series User Manual page 5

VFD500 high performance vector control frequency inverter user manual
If a contactor is installed between the inverter output terminals (U, V, W) and the motor, make
sure that the inverter is turned on and off when there is no output. Otherwise, the inverter may
be damaged.
Lightning impulse protection

Although this series of inverters are equipped with lightning over-current protection device, there
is a certain degree of self-protection for inductive lightning, but for lightning frequent place,
customers should also install lightning protection device in the front of the inverter.
Altitude and derating use

In areas above 1000m above sea level, it is necessary to derate the inverter due to poor air
quality due to poor air quality. In this case, please consult our company.
Power input

The inverter power input should not exceed the operating voltage range specified in this manual.
If necessary, use a step-up or step-down device to change the power supply to the specified
voltage range.
Do not change the three-phase inverter to two-phase input, otherwise it will cause malfunction
or inverter damage.
Output filtering

When the cable length between the inverter and the motor exceeds 100 meters, it is suggested
to use the output AC reactor to avoid inverter over-current caused by excessive distributed
capacitance. Output filter according to the needs of the field matching.
Inverter output is PWM wave, please do not install the capacitor on the output side to improve
the power factor or lightning varistor, etc., otherwise it may easily lead to inverter instantaneous
overcurrent or even damage the inverter.
About motor heat and noise

Because the inverter output voltage is PWM wave, contains a certain degree of harmonics, so
the motor temperature rise, noise and vibration compared with the same frequency operation
will be slightly increased.
Disposal

Electrolytic capacitors on the main circuit and electrolytic capacitors on the printed circuit board
may explode when incinerated, and poisonous gases are generated when plastic parts are
burned. Please dispose as industrial waste.
The scope of application

This product is not designed and manufactured for use on equipment where life is at stake. To
use this product on a mobile, medical, aerospace, nuclear or other special purpose device,
please contact our company For more information.
This product is manufactured under strict quality control and should be equipped with a safety
device if it is used in a device that may cause a serious accident or damage due to inverter
failure.
Chapter 1 Safety information and precautions
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