Vacon NXP series - NXB - Brake Chopper Units

vacon • 82 Technical information
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6.3.4 NXB - Brake chopper units
Brake chopper units are available in frame sizes FI9-FI14. The technical specifications for brake
chopper units are the same as for inverter units (see Chapter 6.3.3.2).
Protection
Overvoltage protection
Undervoltage protection
NXI_5: 911 V DC; NXI_6: 1200 V DC
NXI_5: 333 V DC; NXI_6: 460 V DC
Ground fault protection
In case of an ground fault in the motor or motor
cable, only the inverter is protected
Output phase supervision Trips if any of the output phases is missing
Over current protection Yes
Unit over temperature
protection
Yes
Motor overload protection Yes
Motor stall protection Yes
Motor underload
protection
Yes
Short circuit protection of
+24 V and +10 V reference
voltages
Yes
Table 19. Technical specifications for size FI9-FI14 inverter units (INU)