VB3/V5/VB5 series inverter
3
1
．
Confirm that the voltage of the main AC power supply satisfies the rated voltage of the Inverter. Injury and fire
may occur if the voltage is not right.
2
．
Do not perform voltage withstand tests on the Inverter. Otherwise, semiconductor elements and other devices
can be damaged.
3
．
Connect braking resistors, Braking Resistor Units, and Braking Units as shown in the I/O wiring examples.
Otherwise, a fire may occur.
4. Tighten all terminal screws to the specified tightening torque.
Otherwise, a fire may occur.
5. Do not connect AC power to output terminals U, V, and W.
The interior parts of the Inverter will be damaged if voltage is applied to the output terminals.
6. Do not connect phase-advancing capacitors or LC/RC noise filters to the output circuits.The Inverter may be
damaged or internal parts burnt if these devices are connected.
7. Do not connect electromagnetism switch, electromagnetism contactor to output circuit. When the inverter is
running with load, the electromagnetism switch and electromagnetism contactor will generate inrush current
which will cause inverter’s over current protection.
8. Do not disassemble the whole front cover as disassembling the top front while wiring is ok. Otherwise, inverter
internal parts may be damaged.
Maintenance and Inspection
Danger
1
．
Do not touch the inverter terminals, as they may carry high voltage.
Otherwise, an electric short may occur.
2
．
Make sure to have protective cover .Always have the protective cover in place when power is being supplied to
the Inverter. When attaching the cover, please with the power turns off.
Otherwise, an electric short may occur.
3
．
Maintenance, inspection, must be performed only by authorized personnel.
Otherwise, an electric short may occur.
Notice
1. A CMOS IC is used in the control board. Handle the control board and CMOS IC carefully. The CMOS IC can
be destroyed by static electricity if touched directly.
2
．
Do not change the wiring, or remove connectors or the Digital Operator, during operation
.
Otherwise, The devices may be damaged.
Constant torque low speed running
When the inverter outputs to a common motor at low speed for a long term, the output rated torque should be derated due
to the worsening radiating effect. If low speed constant torque long term running is required, then a special variable fre-
quency motor is needed.
Motor insulation
When using the V5/F5 series inverter, make sure to confirm the insulation of the motor which will be used to avoid device
damage. Besides, do the periodic check for the insulation condition of the motor located in the bad environment to guaran-
tee the system can operate safely.
Negative torque load
If in the case of improving load, negative torque may occur. Braking units should be connected with the inverter, or over
current and over voltage fault may happen.
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Usage Precautions
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