09.02  Contents 
Siemens AG    6SE7087-6AK85-1AA0
  0-3 
Rectifier/Regenerating Unit    Operating Instructions 
Contents 
  Page 
0 Definitions .......................................................................................................................  0-9 
 
1 Description .....................................................................................................................  1-1 
1.1 Application ............................................................................................................................  1-1 
1.2 Principle of operation ...........................................................................................................  1-1 
 
2  Transport, unpacking and assembly ...................................................................  2-1 
2.1 Transport and unpacking .....................................................................................................  2-1 
2.2 Storage .................................................................................................................................  2-1 
2.3 Assembly ..............................................................................................................................  2-1 
2.4 Dimension drawings .............................................................................................................  2-3 
 
3 Connection .....................................................................................................................  3-1 
3.1 Power connections ...............................................................................................................  3-2 
3.1.1  Short-circuit withstand capability for sizes H and K .............................................................  3-9 
3.2  Power supply and main contactor ........................................................................................  3-14 
3.3  Control terminal block and serial interface ...........................................................................  3-15 
3.3.1  Connectors for the control terminal block  ............................................................................  3-15 
3.3.2 Connecting the control leads ...............................................................................................  3-15 
3.3.3  Terminals and setting elements on the CUR (A10) module ................................................  3-16 
3.3.4  Connecting-up the parameterizing unit (PMU) ....................................................................  3-18 
3.4  Measures for keeping to RFI suppression regulations ........................................................  3-19 
3.5  Single-line diagrams with suggested circuit arrangements  .................................................  3-20 
3.6 Power sections .....................................................................................................................  3-28 
3.7  Parallel connection of parallel unit(s), size K .......................................................................  3-47 
3.7.1  Single-line diagrams with suggested circuit arrangements for parallel connection .............  3-50 
3.8  12-pulse mode (only possible with the optional RS485 interface) .......................................  3-52 
3.8.1  General information on 12-pulse mode, application ............................................................  3-52 
3.8.2  Hardware requirements, configuration of the power sections  .............................................  3-52 
3.8.3 Parameterization for 12-pulse mode ....................................................................................  3-54 
3.8.4  Control/status word for 12-pulse mode (r599) and control word 2, bit 23 ...........................  3-56 
3.8.5 Start-up with 12-pulse mode ................................................................................................  3-57 
3.8.6 Redundancy mode ...............................................................................................................  3-59 
3.8.7  RS485 interface cable for the peer-to-peer link on SST2 ....................................................  3-60 
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