Toshiba TOSVERT VF-AS3, Instruction Manual

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E6582062 
I. Safety precautions
I-8
I
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■ When operation by communication or extension panel is selected
■ When auto-restart after momentary stop function is selected
■ When retry function is selected
Mandatory
action
• Use the inverter that conforms to specifications of the power supply and the three-phase motor
to be operated.
If you use the inappropriate inverter, not only will the three-phase motor not rotate correctly, but
it will cause serious accidents such as overheating and burning out.
• Take countermeasures against leakage current.
The leakage current through the stray capacitance of the input/output power wires of inverter
and motor can affect peripheral devices. In that case, please take countermeasures such as
reducing the carrier frequency or shortening the length of input/output power wires. When the
total wire length (total length between an inverter and motors) is more than 100m, if the trip
occurs with the motor no-load current, make enough space between phase wires or insert the
filter (MSF: motor-end surge voltage suppression filter).
Warning
Mandatory
action
• Set the parameter Communication time-out.
If the parameter is not properly set, the inverter cannot be stopped immediately and this will
result in injury and accidents.
• Install an emergency stop device and an interlock that are configured in accordance with the
system specifications.
If the inverter cannot be stopped immediately via communication or the extension panel, this
will result in injury and accidents.
Caution
Mandatory
action
• When the auto-restart after momentary stop function is selected, stand clear of motors and
machines at momentary power failure.
The motors and machines which have stopped due to momentary power failure will restart
suddenly after power is restored, and this will result in injury.
• Attach caution labels indicating functions programmed for Auto restart, on inverters, motors and
machines.
Please prevent accidents with the caution labels.
Caution
Mandatory
action
• When the retry function is selected, stand clear of motors and machines at tripping stop.
The motors and machines which have stopped due to tripping stop will restart suddenly, and
this will result in injury.
Take measures for securing safety even if the motor restarts unexpectedly, such as attaching a
cover to the motor.
• Attach caution labels indicating functions programmed for Retry, on inverters, motors and
machines.
Please prevent accidents with the caution labels.