Fuji Electric FRN0001C2S-2A FRN0002C2S-2A FRN0004C2S-2A FRN0006C2S-2A FRN0010C2S-2A FRN0012C2S-2A FRN0020C2S-2A FRN0025C2S-2A FRN0033C2S-2A FR Instruction Manual page 24

Discontinuance
of power-factor
correcting ca-
pacitor
Discontinuance
of surge killer
Combina-
tion with Reducing noise
peripheral
devices
Measures against
surge currents
Megger test
Control circuit
wiring length
Wiring length
between inverter
and motor
Wiring
Wiring size
Wiring type
Grounding
Driving gen-
eral-purpose
Selecting
motor
inverter
capacity
Driving special
motors
When exporting an inverter built in a panel or equipment, pack them in a previously
fumigated wooden crate. Do not fumigate them after packing since some parts
inside the inverter may be corroded by halogen compounds such as methyl bro-
Transpor-
mide used in fumigation.
tation and
storage
When packing an inverter alone for export, use a laminated veneer lumber (LVL).
For other transportation and storage instructions, see Chapter 1, Section 1.3
"Transportation" and Section 1.4 "Storage Environment."
Do not mount power-factor correcting capacitors in the in-
verter'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.
Do not connect a surge killer to the inverter's secondary
circuit.
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
current is generated by open/close of the phase-advancing
capacitor 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 7.5 "Insulation Test."
When using remote control, limit the wiring length between
the inverter and operator box to 20 m (66 ft) or less and use
twisted pair or shielded cable.
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 (164 ft). 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
current 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 nominal applied motor
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
xxii