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vacon • 26
Technical data
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
I
th
= Thermal maximum continuous RMS current. Dimensioning can be done according to this current if the
process does not require any overloadability or the process does not include any load variation.
I
L
= Low overloadability current. 10% load variation. 10% exceeding can be continuous.
I
H
= High overloadability current. 50% load variation. 50% exceeding can be continuous.
All values with cos
ϕ
= 0.83 and efficiency = 97%.
*) c = power loss into coolant; a = power loss into air; T = total power loss; power losses of input chokes not
included. All power losses obtained using max. supply voltage, I
th
and switching frequency of 3.6 kHz and
Closed Loop control mode. All power losses are worst case losses.
If some other mains voltage is used, apply the formula
P =
x Un x In x cos
ϕ
x eff%
to calculate the VACON
®
NX Liquid-Cooled drive output power.
The enclosure class for all VACON
®
NX Liquid-Cooled AC drives is IP00.
If the motor is continuously (besides start and stop ramps) run at frequencies below 5 Hz, pay attention to the
drive dimensioning for low frequencies, i.e. maximum I
H
= 0.66*I
th
or choose drive according to I
H
. It is
recommended to check the rating with your nearest distributor.
Drive overrating may also be necessary if the process requires high starting torque.
0416_6
416
378
277
250
355
9.1/0.5/9.6
CH72
0460_6
460
418
307
315
400
10.0/0.5/10.5
CH72
0502_6
502
456
335
355
450
11.2/0.6/11.8
CH72
0820_6
820
745
547
600
750
17.3/1.0/18.3
CH74
0920_6
920
836
613
650
850
19.4/1.1/20.5
CH74
1030_6
1030
936
687
750
950
21.6/1.2/22.8
CH74
1180_6
1180
1073
787
800
1100
25.0/1.3/26.3
CH74
1300_6
1300
1182
867
950
1200
27.3/1.5/28.8
CH74
1500_6
1500
1364
1000
1050
1400
32.1/1.7/33.8
CH74
1700_6
1700
1545
1133
1150
1550
36.5/1.9/38.4
Ch74
1850_6
1850
1682
1233
1250
1650
39.0/2.0/41.0
2*CH74
2120_6
2120
1927
1413
1450
1900
44.9/2.4/47.3
2*CH74
2340_6
2340
2127
1560
1600
2100
49.2/2.6/51.8
2*CH74
2700_6
2700
2455
1800
1850
2450
57.7/3.1/60.8
2*CH74
3100_6
3100
2818
2067
2150
2800
65.7/3.4/69.1
2*CH74
Table 10. Internal brake chopper unit (BCU) ratings, braking voltage 840—1100 VDC
Internal brake chopper ratings, braking voltage 840-1100 Vdc
AC drive Type
Loadability
Braking capacity at 840 Vdc
Braking capacity at 1100 Vdc
Chassis
Rated min
resistance
[
Ω
]
Rated cont. brak-
ing power
[kW]
BCU rated cont.
braking current,
I
br
[A]
Rated cont. brak-
ing power
[kW]
BCU rated cont.
braking current,
I
br
[A]
NX_325 6
1)
2.8
252
300
432
392
Ch72
NX_385 6
1)
2.8
252
300
432
392
Ch72
NX_416 6
1)
2.8
252
300
432
392
Ch72
Table 9. Power ratings of VACON
®
NX Liquid-Cooled AC drive (12-pulse),
supply voltage 525—690 VAC
Mains voltage 525-690 VAC, 50/60 Hz, 3~, 12-pulse drives
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