Discontinuance
of power
capacitor for
power factor
correction
Do not mount power capacitors for power factor correction in the inverter’s primary circuit. (Use
the DC reactor to correct the inverter power factor.) Do not use power capacitors for power factor
correction in the inverter’s output (secondary) circuit. An overcurrent trip will occur, disabling motor
operation.
Discontinuance
of surge killer
Do not connect a surge killer to the inverter's output (secondary) circuit.
Reducing noise Use of a filter and shielded wires is typically recommended to satisfy EMC Directive.
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 power capacitor for power
factor correction 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 Chapter 7, Section 7.5 "Insulation Test" of FRENIC Multi Instruction
Manual (INR-SI47-1094-E).
Control circuit
wiring length
When using remote control, limit the wiring length between the inverter and operator panel to 20
m or less and use twisted pair or shielded cable.
Wiring length
between inverter
and motor
If a long cable run is required between the inverter and the motor, the inverter may overheat or trip
as a result of overcurrent (high-frequency current flowing into the stray capacitance) in the cables
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).
Wiring size
Select cables with a sufficient capacity by referring to the current value or recommended wire
size.
Wiring type
When several inverters drive motors, 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 nominal applied motor rating 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 one size larger capacity 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" of FRENIC Multi
Instruction Manual (INR-SI47-1094-E).
1.2 Conformity to European standards
The CE marking on Fuji Electric products indicates that they comply with the essential requirements of the
Electromagnetic Compatibility (EMC) Directive 89/336/EEC issued by the Council of the European Communities and
the Low Voltage Directive 73/23/EEC.
Inverters with built-in EMC filter that bear a CE marking are in conformity with EMC directives. Inverters having no
built-in EMC filter can be in conformity with EMC directives if an optional EMC compliant filter is connected to them.
General purpose inverters are subject to the regulations set forth by the Low Voltage Directive in the EU. Fuji Electric
declares the inverters bearing a CE marking are compliant with the Low Voltage Directive.
FRENIC Multi inverters are in accordance with the regulations of following council directives and their amendments:
EMC Directive 89/336/EEC (Electromagnetic Compatibility)
Low Voltage Directive 73/23/EEC (LVD)
For assessment of conformity the following relevant standards have been taken into consideration:
EN61800-3:2004
EN50178:1997
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