2 DC1…20… and DC1…OE1 Variable Frequency Drives 02/20 MN040059EN www.eaton.com
2.3 Cable cross-sections.................................................................... 39
2.4 Safety and switching.................................................................... 40
2.4.1 Disconnecting device................................................................... 40
2.4.2 Fuses ........................................................................................... 40
2.4.3 Residual current circuit-breaker (RCD)......................................... 41
2.4.4 Overvoltage protection ................................................................ 41
2.4.5 Mains contactors ......................................................................... 42
2.5 Mains chokes............................................................................... 43
2.6 Radio interference suppression filter........................................... 44
2.7 Braking resistances...................................................................... 45
2.8 Motor chokes............................................................................... 48
2.9 Sine filter...................................................................................... 49
2.10 Switching to the output side........................................................ 50
2.10.1 Contactors.................................................................................... 50
2.10.2 Switch-disconnectors................................................................... 51
2.10.3 Bypass circuit............................................................................... 52
2.10.4 Connecting Motors in Parallel...................................................... 53
2.11 Three-phase motors..................................................................... 55
2.11.1 Motor Selection ........................................................................... 55
2.11.2 Circuit types with three-phase motors......................................... 56
2.11.3 Permanent magnet motor (PM motor) ........................................ 57
2.11.4 Brushless DC motor (BLDC motor).............................................. 57
2.11.5 Synchronous reluctance motor (SynRM) ..................................... 58
2.11.6 Single-phase AC motors .............................................................. 59
2.11.7 Connecting Ex motors ................................................................. 59
3 Installation.................................................................................. 61
3.1 Introduction.................................................................................. 61
3.2 Mounting position........................................................................ 61
3.3 Mounting ..................................................................................... 62
3.3.1 Mounting position........................................................................ 63
3.3.2 Cooling measures ........................................................................ 63
3.3.3 Fixing ........................................................................................... 66
3.4 IP66 / NEMA4X degree of protection .......................................... 69
3.5 EMC installation........................................................................... 70
3.5.1 EMC measures in the control panel............................................. 70
3.5.2 Earthing........................................................................................ 72
3.5.3 EMC screw .................................................................................. 73
3.5.4 Screen earth kit............................................................................ 75
3.5.5 EMC cable brackets ..................................................................... 76
3.5.6 General installation diagram......................................................... 78
3.6 Electrical Installation .................................................................... 79
3.6.1 Connection to power section....................................................... 80
3.6.2 Connection on control section ..................................................... 93
3.6.3 Thermistor connection................................................................. 106
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