Chapter 1.Inspection and safety precautions
4
Ch
ap
ter 1
parameter values inside inverter or install thermal relay in the front
of motor for motor protection.
3
Run over power
frequency
The inverter output frequency rang is 0Hz to 3200Hz(Max.vector
control only supports 300Hz). If the user is required to run at 50Hz
or more, please consider the endurance of your mechanical
devices.
4
Vibrations of
mechanical device
Inverter output frequency may be encountered mechanical
resonance point of the load device, you can set jump frequency
parameter inside inverter to avoid the case.
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 proving
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
ratedvoltage
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
When electrolytic capacitors on the main circuit and printed circuit
board as well as plastic parts are burned, it may produce toxic
gases.Please disposing as industrial waste.
14
Adaptive motor
1) Standard adaptive motor shall be four-pole asynchronous
squirrel-cage induction motor or permanent magnet synchronous
motor. Apart from the said motors, please select the inverter
according to the motor rated current.
2) The cooling fan and the rotor shaft for non-inverter motor are
coaxially connected, the fan cooling effect is reduced when the
rotational speed is reduced, therefore, when the motor works in
