Precautions for use of the inverter
Power-OFF and magnetic contactor (MC)
FR-A800
3 - 17
3.4
Power-OFF and magnetic contactor (MC)
Inverter input side magnetic contactor (MC)
On the inverter input side, it is recommended to provide an MC for the following purposes:
(Refer to page 2-4 for selection.)
●
To disconnect the inverter from the power supply at activation of a protective function or at
malfunctioning of the driving system (emergency stop, etc.). For example, an MC prevents
overheat or burnout of the brake resistor when heat capacity of the resistor is insufficient or brake
regenerative transistor is damaged with short while connecting an optional brake resistor.
●
To prevent any accident due to an automatic restart at power restoration after an inverter stop
made by a power failure.
●
To separate the inverter from the power supply to ensure safe maintenance and inspection work.
If using an MC for emergency stop during operation, select an MC regarding the inverter input side
current as JEM1038-AC-3 class rated current.
NOTE
Since repeated inrush currents at power ON will shorten the life of the converter circuit (switching
life is about 1,000,000 times), frequent starts and stops of the magnetic contactor must be
avoided. Turn ON/OFF the inverter start controlling terminals (STF, STR) to run/stop the inverter.
Summary of Contents for FR-A800
Page 2: ......
Page 4: ......
Page 22: ...Contents XVIII ...
Page 30: ...Related manuals Introduction 1 8 ...
Page 122: ...Connection of stand alone option units Installation and wiring 2 92 ...
Page 180: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Page 934: ...Check first when you have a trouble Protective functions 6 46 ...
Page 1031: ...Appendix EC Declarations of Conformity FR A800 A 47 ...
Page 1032: ...EC Declarations of Conformity Appendix A 48 ...
Page 1033: ...Appendix EC Declarations of Conformity FR A800 A 49 ...
Page 1034: ...EC Declarations of Conformity Appendix A 50 ...
Page 1035: ...Appendix EC Declarations of Conformity FR A800 A 51 A 5 2 EMC Directive ...
Page 1036: ...EC Declarations of Conformity Appendix A 52 ...
Page 1037: ...Appendix EC Declarations of Conformity FR A800 A 53 ...
Page 1038: ...EC Declarations of Conformity Appendix A 54 ...
Page 1039: ...Appendix EC Declarations of Conformity FR A800 A 55 ...
Page 1040: ...EC Declarations of Conformity Appendix A 56 ...
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