Chapter 1 Inspection and Safety Precautions
5
No.
Type
Explanation
5
Motor heat and
noise
The inverter output voltage is PWM wave that contains a
certain amount of harmonics, so the temperature rise,noise
and vibration of motor show a slight higher than frequency
power frequency operation.
6
Output side with
piezoresistor or
capacitor for
improving power
factor
The inverter output is PWM wave, if the piezoresistor for
lightning protection or the capacitor for improving power
factor is installed in the output side, which easily cause the
inverter instantaneous overcurrent or even cause damage to
the inverter. Please do not use.
7
Contactor or
switch used in the
inverter
input/output
terminals
If contactor is installed between power supply and
inverter,the contactor is not allowed to start/stop the
inverter. Necessarily need to use the contactor to control the
inverter start/stop, the interval should not be less than one
hour. Frequent charging and discharging may reduce the
service life of the inverter capacitor. If the contactor or
switch is equipped between output terminals and motor, the
inverter should be turned on/off without output status,
otherwise which easily lead to damage to the inverter
module.
8
Use other than the
rated voltage
PI series inverter is not suitable for use beyond the
allowable operating voltage described in this manual,which
easily cause damage to the parts inside inverter. If necessary,
please use the corresponding transformer to change voltage.
9
Never change 3-
phase input to 2-
phase input
Never change PI series 3-phase inverter to 2-phase one for
application. Otherwise it will lead to malfunction or damage
to the inverter.
10
Lightning surge
protection
The series inverter is equipped with lightning overcurrent
protection device, so it has the ability of self-protection to
lightning induction. For the area where lightning is frequent,
user should also install the extra protection in the front of
the inverter.
11
High altitude and
derating
application
When the inverter is used in areas over 1000m altitude,it is
required to reduce frequency because the thin air will
decrease the cooling effect of inverter. Please consult our
technician for details on the application.
12
Special use
If the user need to use methods other than the suggested
wiring diagram provided in this manual, such as common
DC bus, please consult our technician.
13
Precautions for
scrap disposal of
the inverter
It may explode when electrolytic capacitors on the main
circuit and printed circuit board are burned. When burning
plastic parts, it may produce toxic gases.Please disposing as
industrial waste.
14
About
adaptive motor
1) Standard adaptive motor shall be four-pole asynchronous
squirrel-cage induction motor. Apart from the said
motors, please select the inverter according to the motor
rated current.
