4
CONTENTS
3.1.2 Countermeasures against inverter-generated EMI ........................................................................................ 49
3.2 Power supply harmonics 51
3.2.1 Power supply harmonics ................................................................................................................................ 51
3.3 Installation of a reactor 51
3.4 Power-OFF and magnetic contactor (MC) 52
3.5 Countermeasures against deterioration of the 600 V class motor insulation 53
3.6 Checklist before starting operation 54
3.7 Failsafe system which uses the inverter 57
4 PROTECTIVE FUNCTIONS 59
4.1 Inverter fault and alarm indications 60
4.2 Reset method for the protective functions 60
4.3 List of fault displays 61
5 PRECAUTIONS FOR
MAINTENANCE AND INSPECTION 63
5.1 Inspection item 64
5.1.1 Daily inspection .............................................................................................................................................. 64
5.1.2 Periodic inspection ......................................................................................................................................... 64
5.1.3 Daily and periodic inspection.......................................................................................................................... 65
5.1.4 Checking the inverter and converter modules................................................................................................ 66
5.1.5 Cleaning ......................................................................................................................................................... 67
5.1.6 Replacement of parts ..................................................................................................................................... 67
5.1.7 Inverter replacement ...................................................................................................................................... 69
5.2 Measurement of main circuit voltages, currents and powers 70
5.2.1 Measurement of powers................................................................................................................................. 72
5.2.2 Measurement of voltages and use of PT........................................................................................................ 72
5.2.3 Measurement of currents ............................................................................................................................... 73
5.2.4 Use of CT and transducer .............................................................................................................................. 73
5.2.5 Example of measuring converter unit (FR-CC2-C) input power factor........................................................... 73
5.2.6 Measurement of converter output voltage (across terminals P and N) .......................................................... 73
5.2.7 Measurement of inverter output frequency..................................................................................................... 74
5.2.8 Insulation resistance test using megger ......................................................................................................... 74
5.2.9 Pressure test .................................................................................................................................................. 74
6 SPECIFICATIONS 75
6.1 Inverter rating 76
6.2 Common specifications 77
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