227Operation principle and hardware description .................................................
227Planning the braking system .....................................................................
227Selecting the default brake circuit components - ABB chopper and ABB resistor ....
228
Calculating the maximum allowed braking power for a custom duty cycle – ABB
chopper and ABB resistor .....................................................................
228Example ......................................................................................
228
Selecting the default brake circuit components - ABB brake chopper and custom
resistor ...........................................................................................
229Selecting custom resistors .................................................................
230
Calculating the maximum allowed braking power for a custom duty cycle – ABB
chopper and custom resistor .................................................................
230Example 1 ....................................................................................
230Example 2 ....................................................................................
231Selecting and routing brake resistor cables ....................................................
231Minimizing electromagnetic interference ....................................................
231Maximum cable length .........................................................................
231Placing the brake resistors ....................................................................
232Protecting the system against thermal overload ...........................................
232Protecting the resistor cable against short-circuits ........................................
232Mechanical installation of resistors ..............................................................
232Electrical installation ...............................................................................
232Measuring the insulation of the brake resistor circuit .....................................
233Connection diagram ............................................................................
233Connection procedure .........................................................................
234Start-up ..............................................................................................
235Technical data ......................................................................................
235Ratings ...........................................................................................
235ABB brake chopper and DC fuse ratings ................................................
236ABB brake resistor ratings .................................................................
237ABB resistors (SAFUR) - additional data ...................................................
237Dimensions, weights and ordering codes ...............................................
237Brake chopper types and ordering codes ...................................................
237Terminals and cable entry data ...............................................................
22 Filters
239Contents of this chapter ...........................................................................
239du/dt filters ..........................................................................................
239When is a du/dt filter necessary? ............................................................
239Selection table ..................................................................................
240Ordering codes .................................................................................
240Description, installation and technical data of the FOCH filters .........................
240Sine filters ...........................................................................................
240When is a sine filter necessary? .............................................................
240Selection table ..................................................................................
240ABB ordering codes ............................................................................
240Derating ..........................................................................................
240Description, installation and technical data of the sine filters ............................
23 Step-by-step drawings for an installation example of standard drive
configuration in Rittal VX25 800 mm wide enclosure
241Contents of this chapter ...........................................................................
Table of contents 13
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