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NEURN030000_220_A
NEURN030000_220_A
3.2 Precautions
No.
Type
Explanation
1
Motor insulation
inspection
Please perform motor insulation inspection for the first time use, re-use after leaving unused for a long time as well
as regular check, in order to prevent damage to the inverter because of the motor’s winding insulation failure. Wiring
between motor and inverter shall be disconnected, it is recommended that the 500V voltage type megger should be
adopted and insulation resistance shall be not less than 5MΩ.
2
Motor thermal
protection
If the rated capacity of the selected motor does not match the inverter, especially when the inverter rated power is
greater than the motor rated power, be sure to adjust the motor protection 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~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 The standard adaptive motor is a four pole squirrel cage asynchronous induction motor. If the motor is not mentioned
above, please select the frequency converter according to the rated current of the motor.
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 inverter alarm, even bombing. Therefore, firstly perform
insulation short-circuit test for the initial installation of the motor and cable, routine maintenance often also need to
perform such test. Note that the parts to be tested and the inverter shall be disconnected completely when testing.
15
Others
1 We need to fix cover and lock before power on, so as to avoid the harm to personal safety that is caused by internal
injuries of bad capacitors and other components.
2 Do not touch internal circuit board and any parts after powering off and within five minutes after keyboard indicator
lamp goes out, you must use the instrument to confirm that internal capacitor has been discharged fully, otherwise
there is a danger of electric shock.
3 Body static electricity will seriously damage the internal MOS field-effect transistors, etc., if there are not anti-static
measures, do not touch the printed circuit board and IGBT internal device with hand, otherwise it may cause a
malfunction.
4 The ground terminal of the inverter(E or ) shall be earthed firmly according to the provisions of the National
Electrical Safety and other relevant standards. Do not shut down(Power off) by pulling switch, and only cut off the
power until the motor stopping operation.
5 It is required to add the optional input filter attachment so as to meet CE standards.
