E6581611
6
I
Caution
Reference
section
Mandatory
action
Use an inverter that conforms to the specifications of power supply and three-phase
induction motor being operated. If the inverter being used does not conform to those
specifications, not only will the three-phase induction motor not rotate correctly, but it will
cause serious accidents through overheating and fire.
The leakage current through the input/output power cables of inverter and capacitance of
motor can affect to peripheral devices.
The value of leakage current is increased under the condition of the PWM carrier
frequency and the length of the input/output power cables. In case the total cable length
(total of length between an inverter and motors) is more than 100m, overcurrent trip can
occur even the motor no-load current.
Make enough space among each phase cable or install the filter (MSF) as
countermeasure.
1.4.1
1.4.3
When operation by using remote keypad is selected
Warning
Reference
section
Mandatory
action
Set the parameter Communication time-out time (f803), Communication time-out
action (f804) and Disconnection detection of extension panel (f731).
If these are not properly set, the inverter can not be stopped immediately in breaking
communication and this could result in injury and accidents.
An emergency stop device and the interlock that fit with system specifications must be
installed.
If these are not properly installed, the inverter can not be stopped immediately and this
could result in injury and accidents.
6.38.1
6.38.1
When sequence for restart after a momentary failure is selected (inverter)
Caution
Reference
section
Mandatory
action
Stand clear of motors and mechanical equipment.
If the motor stops due to a momentary power failure, the equipment will start suddenly
after power is restored. This could result in unexpected injury.
Attach caution label about sudden restart after a momentary power failure on inverters,
motors and equipment for prevention of accidents in advance.
5.9
5.9
When retry function is selected (inverter)
Caution
Reference
section
Mandatory
action
Stand clear of motors and equipment.
If the motor and equipment stop when the alarm is given, selection of the retry function will
restart them suddenly after the specified time has elapsed. This could result in unexpected
injury.
Attach caution label about sudden restart in retry function on inverters, motors and
equipment for prevention of accidents in advance.
6.19.3
6.19.3
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