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
Содержание NX
Страница 1: ...vacon nx ac drives liquid cooled drives user manual ...
Страница 2: ......