Chapter 1.Inspection and Safety Precautions
5
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.
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.
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.
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.
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.
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.
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.
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
overheating occasions, a strong exhaust fan should be retrofitted
or replace non-inverter motor with the inverter motor.
3) The inverter has built-in the adaptive motor standard
parameters, according to the actual situation, please identify
motor parameters or accordingly modify the default values to try
to meet the actual value, otherwise it will operation affect and
protection performance;
4) When short-circuit of cable or motor internal will activate the
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