Chziri ZVF200-M User Manual page 6

If the inverter runs at a frequency higher than 50Hz, DO confirm
it is within the speed range acceptable by your motor bearing and
mechanical device. Otherwise, there is the danger of damage to
the motor.
It is not advisory to run the reduction box, gear and other
mechanism that need lubricating at low speed for a long period.
Otherwise, it may reduce the service life of these equipment or
even damage the equipment.
A general motor should be derated before use due to less effective
of heat dissipation when it runs at a low frequency. If it is a constant
torque load, then a forced method or a special variable frequency
WARNING
motor should be used to release heat.
DO cut off the power supply of an inverter set aside for a long
time to avoid foreign matter or other things enter in it which may
cause damage to the inverter or even lead to fire.
The output voltage of inverter is PWM impulse wave. DO NOT
install a capacitor or surge current sink (i.e., a varistor) in the
i nverter output po rt. Otherwise, there is the danger of fault tripping
of the inverter or damage to its power elements. DO remove such
kind of things if already installed. See the Figure 1-3 below.
Forbidden
Inverter
Power factor
compensation
capacitor
Figure 1-3
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Chapter 1 Safety Instruction
Surge current sink
Forbidden
Motor insulation should be checked before the motor is used
for the first use or reused after a long-term idle. Be sure the
insulation resistance measured is no lower than 5M .
If the inverter is used beyond the range of allowable working
voltage, then an extra step-up or step-down voltage transformer
shall be configured.
Due to thin air in a place where the altitude is higher than 1,000m,
CAUTION
the heat dissipation of inverter will be less effective. Hence
derating should be done before use. In general, when the height
rises by 1, 000m, the rated voltage of the inverter shall reduce by
10%. Refer to the Figure 1-4 for details of the derating curve.
Figure 1-4 Diagram of Inverter Derating Curve
DO NOT touch the radiator or charging resistor of the invert er
with hands. Otherwise, there is the possibility of getting
scaled.
DO NOT proceed direct start-stop operation frequently with a
contactor or any other switch devices in the inverter input side.
As large charging current exists in the main circuit of the
inverter,frequency power-on/off may produce cumulative effect
FORBIDDEN
resulting in heat fatigue of inverter components and great
reduction of service life of the inverter. See the detail in the
Figure 1-5.
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Chapter 1 Safety Instruction
M