CHAPTER 3 PRECAUTIONS FOR USE OF THE INVERTER CHAPTER 3 4 5 3.1 Electro-magnetic interference (EMI) and leakage currents ....................................................................................48 6 3.2 Power supply harmonics.........................................................................................................................................53 3.3 Installation of a reactor ...........................................................................................................................................57 3.4 Power shutdown and magnetic contactor (MC)......................................................................................................58 7 3.5 Countermeasures against deterioration of the 400 V class motor insulation..........................................................59 3.6 Checklist before starting operation .........................................................................................................................60 3.7 Failsafe system which uses the inverter.................................................................................................................62 8 9 10 47