Vacon NX User Manual

4
vacon • 24 Technical data
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
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.
Table 7. Internal brake chopper unit (BCU) ratings, braking voltage 640—800 VDC
Internal brake chopper ratings, braking voltage 640-800 Vdc
AC drive
type
Loadability Braking capacity at 600 Vdc Braking capacity at 800 Vdc
Chassis
Rated min
resistance
[Ω]
Rated cont.
braking power
[kW]
BCU rated cont.
braking current,
I
br
[A]
Rated cont. brak-
ing power
R at 800VDC
[kW]
BCU rated
cont. braking
current, I
br
[A]
NX_460 5
1)
1.3 276 461 492 615 CH72
NX_520 5
1)
1.3 276 461 492 615 CH72
NX_590 5
1)
1.3 276 461 492 615 CH72
NX_650 5
1)
1.3 276 461 492 615 CH72
NX_730 5
1)
1.3 276 461 492 615 CH72
NX_1370 5 1.3 276 461 492 615 CH74
NX_1640 5 1.3 276 461 492 615 CH74
NX_2060 5 1.3 276 461 492 615 CH74
NX_2300 5 1.3 276 461 492 615 CH74

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