Mitsubishi Electric A800 Instruction Manual page 5

3.1 Electro-magnetic interference (EMI) and leakage currents
3.1.1 Leakage currents and countermeasures........................................................................................................ 62
3.1.2 Countermeasures against inverter-generated EMI ........................................................................................ 65
3.1.3 Converter unit built-in EMC filter .................................................................................................................... 68
3.2 Power supply harmonics
3.2.1 Power supply harmonics ................................................................................................................................ 69
3.2.2 Harmonic Suppression Guidelines in Japan .................................................................................................. 70
3.3 Power-OFF and magnetic contactor (MC)
3.4 Countermeasures against deterioration of the 400 V class motor insulation
3.5 Checklist before starting operation
3.6 Failsafe system which uses the inverter
4 PROTECTIVE FUNCTIONS
4.1 Inverter fault and alarm indications
4.2 Reset method for the protective functions
4.3 Check and clear of the faults history
4.4 List of fault displays
5 PRECAUTIONS FOR
MAINTENANCE AND INSPECTION
5.1 Inspection item
5.1.1 Daily inspection .............................................................................................................................................. 88
5.1.2 Periodic inspection ......................................................................................................................................... 88
5.1.3 Daily and periodic inspection.......................................................................................................................... 89
5.1.4 Checking the inverter and converter modules................................................................................................ 90
5.1.5 Cleaning ......................................................................................................................................................... 91
5.1.6 Replacement of parts ..................................................................................................................................... 91
5.1.7 Inverter replacement ...................................................................................................................................... 93
5.2 Measurement of main circuit voltages, currents and powers
5.2.1 Measurement of powers................................................................................................................................. 96
5.2.2 Measurement of voltages and use of PT........................................................................................................ 96
5.2.3 Measurement of currents ............................................................................................................................... 97
5.2.4 Use of CT and transducer .............................................................................................................................. 97
5.2.5 Example of measuring converter unit input power factor ............................................................................... 97
5.2.6 Measurement of converter output voltage (across terminals P and N) .......................................................... 97
5.2.7 Measurement of inverter output frequency..................................................................................................... 98
5.2.8 Insulation resistance test using megger ......................................................................................................... 98
5.2.9 Pressure test .................................................................................................................................................. 98
4
CONTENTS
62
69
72
73
74
77
79
80
80
81
83
87
88
94