v
Discontinuance of
power-factor
correcting
capacitor
Do not mount power-factor correcting capacitors in the inverter’s primary
circuit. (Use the DC reactor to improve the inverter power factor.) Do not
use power-factor correcting capacitors in the inverter output circuit. An
overcurrent trip will occur, disabling motor operation.
Discontinuance of
surge killer
Do not connect a surge killer to the inverter's secondary circuit.
Reducing noise
Use of a filter and shielded wires is typically recommended to satisfy EMC
directives.
Measures against
surge currents
If an overvoltage trip occurs while the inverter is stopped or operated under
a light load, it is assumed that the surge current is generated by open/close
of the phase-advancing capacitor in the power system.
* Connect a DC reactor to the inverter.
Combina-
tion with
peripheral
devices
Megger test
When checking the insulation resistance of the inverter, use a 500 V megger
and follow the instructions contained in the FRENIC-Mini Instruction
Manual, Chapter 7, Section 7.4 "Insulation Test."
Control circuit
wiring length
When using remote control, limit the wiring length between the inverter and
operator box to 65.6 ft (20 m) or less and use twisted pair or shielded cable.
Wiring length
between inverter
and motor
If long wiring is used between the inverter and the motor, the inverter will
overheat or trip as a result of overcurrent (high-frequency current flowing
into the stray capacitance) in the wires connected to the phases. Ensure that
the wiring is shorter than 164 ft (50 m). If this length must be exceeded,
lower the carrier frequency or mount an output circuit filter (OFL).
Wiring size
Select wires with a sufficient capacity by referring to the current value or
recommended wire size.
Wiring type
Do not use one multicore cable in order to connect several inverters with
motors.
Wiring
Grounding Securely ground the inverter using the grounding terminal.
Driving
general-purpose
motor
Select an inverter according to the applicable motor ratings listed in the
standard specifications table for the inverter.
When high starting torque is required or quick acceleration or deceleration
is required, select an inverter with a capacity one size greater than the
standard.
Selecting
inverter
capacity
Driving special
motors
Select an inverter that meets the following condition:
Inverter rated current > Motor rated current
Transpor-
tation and
storage
When transporting or storing inverters, follow the procedures and select locations that meet the
environmental conditions listed in Chapter 1, Section 1.3 "Transportation" and Section 1.4
"Storage Environment."
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