Vacon NX User Manual

Technical data vacon • 27
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
4
NOTE! Braking power: P
brake
= U
brake
^2 / R
brake
NOTE! Braking DC current: I
in_max
= P
brake_max
/ U
brake
1)
Only 6 pulse drives
The internal brake chopper can also be used in motor application where 2…4 x Ch7x drives are used for a
single motor, but in this case the DC connections of the power modules must be connected together. The
break choppers are working independently of each other and because of this the DC connections must be
connected together otherwise there can be unbalance between the power modules.
NX_460 6
1)
2.8 252 300 432 392 Ch72
NX_502 6
1)
2.8 252 300 432 392 Ch72
NX_820 6 2.8 252 300 432 392 Ch74
NX_920 6 2.8 252 300 432 392 Ch74
NX_1030 6 2.8 252 300 432 392 Ch74
NX_1180 6 2.8 252 300 432 392 Ch74
NX_1300 6 2.8 252 300 432 392 Ch74
NX_1500 6 2.8 252 300 432 392 Ch74
NX_1700 6 2.8 252 300 432 392 Ch74
Table 10. Internal brake chopper unit (BCU) ratings, braking voltage 840—1100 VDC
Internal brake chopper ratings, braking voltage 840-1100 Vdc

Vacon NX Specifications

General

Product Type	AC Drive
Control Method	Scalar Control
Enclosure	IP00, IP21
Communication	Ethernet
Safety	STO (Safe Torque Off)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Ambient Temperature Range	-10°C to +50°C (with derating above +40°C)
Cooling Method	Air-cooled, Liquid-cooled