Advertisement
3.1
Electro-magnetic interference (EMI) and leakage currents
3.1.1
Leakage currents and countermeasures........................................................................................................ 54
3.1.2
Countermeasures against inverter-generated EMI ........................................................................................ 55
3.2
Power supply harmonics
3.2.1
Power supply harmonics ................................................................................................................................ 57
3.3
Installation of a reactor
3.4
Power-OFF and magnetic contactor (MC)
3.5
Countermeasures against deterioration of the 600 V class motor insulation
3.6
Checklist before starting operation
3.7
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
List of fault displays
5 PRECAUTIONS FOR
MAINTENANCE AND INSPECTION
5.1
Inspection item
5.1.1
Daily inspection .............................................................................................................................................. 70
5.1.2
Periodic inspection ......................................................................................................................................... 70
5.1.3
Daily and periodic inspection.......................................................................................................................... 71
5.1.4
Checking the inverter and converter modules................................................................................................ 72
5.1.5
Cleaning ......................................................................................................................................................... 73
5.1.6
Replacement of parts ..................................................................................................................................... 73
5.1.7
Inverter replacement ...................................................................................................................................... 75
5.2
Measurement of main circuit voltages, currents and powers
5.2.1
Measurement of powers................................................................................................................................. 78
5.2.2
Measurement of voltages and use of PT........................................................................................................ 78
5.2.3
Measurement of currents ............................................................................................................................... 79
5.2.4
Use of CT and transducer .............................................................................................................................. 79
5.2.5
Example of measuring converter unit (FR-CC2) input power factor............................................................... 79
5.2.6
Measurement of converter output voltage (across terminals P and N) .......................................................... 79
5.2.7
Measurement of inverter output frequency..................................................................................................... 80
5.2.8
Insulation resistance test using megger ......................................................................................................... 80
5.2.9
Pressure test .................................................................................................................................................. 80
6 SPECIFICATIONS
4
CONTENTS
54
57
57
58
59
60
62
65
66
66
67
69
70
76
81
Advertisement
