Powtran PI9100 Series Manual page 9

Chapter 1.Inspection and Safety Precautions
When
maintaining
1-3.Precautions
N
Type
o.
Motor
1 insulation
inspection
Motor thermal
2
protection
Run over
3 power
frequency
Vibrations of
4 mechanical
device
Motor heat
5
and noise
Output side
with
6 piezoresistor
or capacitor
for improving
● Do not start/stop the driver by switching on/off
contactor. Otherwise cause damage to this unit!
● Do not perform repairs and maintenance for the live
electrical equipment. Otherwise there is a risk of
electric shock!
● The repairs and maintenance task can be performed
only when the inverter bus voltage is lower than
36V,Otherwise, the residual charge from capacitor would
cause personal injury!
Danger
● Non-well-trained professional personnel is not
allowed to perform repairs and maintenance of inverter.
Doing this may cause personal injury or damage to this
unit!
● After replacing the inverter, parameter settings must
be redone, all pluggable plugs can be operated only in
the case of powering off!
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.
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.
The inverter output frequency rang is 0Hz to 3200Hz(Maz.vector
control only supports 300Hz). If the user is required to run at
50Hz or more, please consider the endurance of your mechanical
devices.
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.
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.
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.
Explanation
4