1.5 Line-side reactors and filters .......................................................................................................................86

1.5.1

Line reactors (line commutating reactors) ........................................................................................86

1.5.2

Line Harmonics Filters (LHF and LHF compact)...............................................................................87

1.5.2.1

Operating principle of Line Harmonics Filters (LHF and LHF compact) .............................................87

1.5.2.2

Line Harmonics Filter (LHF) with separate housing (6SL3000-0J_ _ _-_AA0) ...................................88

1.5.2.3

Line Harmonics Filter compact (LHF compact) as Option L01 for SINAMICS G150 ...........................90

1.5.3

Line filters (radio frequency interference (RFI) suppression filter or EMC filter) .................................92

1.5.3.1

General information and standards..................................................................................................92

1.5.3.2

Line filters for the "first" environment (residential) and "second" environment (industrial) ..........................95

1.5.3.3

Operating principle of line filters ......................................................................................................95

1.5.3.4

Magnitude of leakage or interference currents .................................................................................96

1.5.3.5

EMC-compliant installation ..............................................................................................................97

1.6 SINAMICS Infeeds and their properties ...................................................................................................... 100

1.6.1

Basic Infeed ................................................................................................................................. 100

1.6.2

Smart Infeed ................................................................................................................................ 102

1.6.3

Active Infeed ................................................................................................................................ 105

1.6.4

Comparison of the properties of the different SINAMICS Infeeds .................................................... 110

1.6.5

- - - ............................................................................................................................................ 112

1.6.6

Redundant line supply concepts .................................................................................................... 112

1.6.7

Permissible total cable length for S120 Infeed Modules feeding multi-motor drives ......................... 117

1.7 SINAMICS braking units (Braking Modules and braking resistors) ........................................................... 118

1.8 SINAMICS Inverters or Motor Modules....................................................................................................... 119

1.8.1

Operating principle and properties ................................................................................................. 119

1.8.2

Drive configurations with multiple Motor Modules connected to a common DC busbar .................... 120

1.8.2.1

Connection of Motor Modules to the DC busbar, fuse protection and precharging ........................... 120

1.8.2.2

Arrangement of Motor Modules along the DC busbar ..................................................................... 122

1.8.2.3

Permissible dimensions and topologies of the DC busbar .............................................................. 125

1.8.2.4

Short-circuit currents on the DC busbar ......................................................................................... 127

1.8.2.5

Maximum power rating of drive configurations at a common DC busbar ......................................... 129

1.9 Effects of using fast-switching power components (IGBTs) ..................................................................... 131

1.9.1

Increased current load on the inverter output as a result of long motor cables ................................. 131

1.9.2

Special issues relating to motor-side contactors and circuit breakers .............................................. 133

1.9.3

Increased voltage stress on the motor winding as a result of long motor cables .............................. 134

1.9.4

Bearing currents caused by steep voltage edges on the motor ....................................................... 139

1.9.4.1

Measures for reducing bearing currents......................................................................................... 140

1.9.4.1.1 EMC-compliant installation for optimized equipotential bonding in the drive system ........................ 141

1.9.4.1.2 Insulated bearing at the non-drive end (NDE) of the motor ............................................................. 145

1.9.4.1.3 Other measures............................................................................................................................ 145

1.9.4.2

Summary of bearing current types and counter-measures .............................................................. 146

1.10 Motor-side reactors and filters ................................................................................................................. 148

1.10.1

Motor reactors .............................................................................................................................. 148

1.10.1.1 Reduction of the voltage rate-of-rise dv/dt at the motor terminals.................................................... 148

1.10.1.2 Reduction of additional current peaks when long motor cables are used......................................... 148

1.10.1.3 Permissible motor cable lengths with motor reactor(s) for single- and multi-motor drives ................. 149

1.10.1.4 Supplementary conditions which apply when motor reactors are used ............................................ 152

1.10.2

dv/dt filters plus VPL and dv/dt filters compact plus VPL ................................................................ 153

Engineering Information

SINAMICS Engineering Manual - November 2015

List of Contents

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