FujiFilm Frenic-Mini Instruction Manual page 14

Discontinuance
of power-factor
correcting ca-
pacitor
Discontinuance
Combina-
of surge killer
tion with pe-
ripheral de-
Reducing noise
vices
Measures against
surge currents
Megger test
Control circuit
wiring length
Wiring
Wiring length
between inverter
and motor
Wiring size
Wiring type
Grounding
Selecting
inverter
Driving general-
capacity
purpose motor
Transpor-
Driving special
tation and
motors
storage
When transporting or storing inverters, follow the procedures and select locations
that meet the environmental conditions listed in Chapter 1, Section 1.3 "Trans-
portation" and Section 1.4 "Storage Environment."
Do not mount power-factor correcting capacitors in the
inverter 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.
Do not connect a surge killer to the inverter's secondary cir-
cuit.
Use of a filter and shielded wires is typically recommended
to satisfy EMC directives.
If an overvoltage trip occurs while the inverter is stopped or
operated under a light load, it is assumed that the surge cur-
rent is generated by open/close of the phase-advancing ca-
pacitor in the power system.
* Connect a DC reactor to the inverter.
When checking the insulation resistance of the inverter, use
a 500 V megger and follow the instructions contained in
Chapter 7, Section 7.4 "Insulation Test."
When using remote control, limit the wiring length between
the inverter and operator box to 20 m or less and use
twisted shielded wire.
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 50 m. If this length must be exceeded, lower
the carrier frequency or mount an output circuit filter (OFL).
Select wires with a sufficient capacity by referring to the cur-
rent value or recommended wire size.
Do not use one multicore cable in order to connect several
inverters with motors.
Securely ground the inverter using the grounding terminal.
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.
Select an inverter that meets the following condition:
Inverter rated current > Motor rated current
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