Vacon NX User Manual page 5

10.1. Introduction ............................................................................................................... 146
10.2. Diagrams ................................................................................................................... 146
10.2.1. Active Front End Unit block diagram ........................................................................ 146
10.3. Type designation code ............................................................................................... 147
10.4. Active Front End unit technical data ......................................................................... 148
10.5. Power ratings ............................................................................................................ 152
10.6. Liquid Cooled RLC filters .......................................................................................... 154
10.6.1. Introduction ............................................................................................................... 154
10.6.2. Wiring diagrams ........................................................................................................ 154
10.6.3. Power rating and dimensions ................................................................................... 155
10.6.4. Technical data ........................................................................................................... 157
10.6.5. Removing discharging resistors ............................................................................... 157
10.6.6. Removing HF capacitors ........................................................................................... 159
10.7. Active front end - fuse selection ............................................................................... 160
10.7.1. Fuse sizes, Active Front End units (AC supply) ........................................................ 160
10.8. Pre-Charcing circuit.................................................................................................. 162
10.9. Parelling .................................................................................................................... 165
10.10. Common pre-charging circuit................................................................................. 166
10.11. Each Active Front End unit has the pre-charcing circuit ....................................... 167
11. BRAKE CHOPPER UNIT (NXB) .................................................................. 168
11.1. Introduction ............................................................................................................... 168
11.2. Type designation code ............................................................................................... 168
11.3. Diagrams ................................................................................................................... 168
11.3.1. NXB Brake Chopper Unit block diagram .................................................................. 168
11.3.2. NXB topologies and connection ................................................................................ 169
11.4. Brake chopper unit technical data............................................................................ 170
11.5. BCU power ratings .................................................................................................... 173
11.5.1. Vacon NXB; DC voltage 460-800 V ............................................................................ 173
11.5.2. Vacon NXB; DC voltage 640-1100 V .......................................................................... 174
11.6. Vacon brake resistors and brake chopper dimensioning......................................... 175
11.6.1. Braking energy and losses ....................................................................................... 175
11.6.2. Braking power and resistance, mains voltage 380-500 Vac/600-800 Vdc .............. 176
11.6.3. Braking power and resistance, mains voltage 525-690 Vac/840-1100 Vdc ............ 178
11.7. Brake chopper unit - Fuse selection ........................................................................ 180
12. APPENDICES ............................................................................................ 182
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