Active front end (NXA)
vacon • 161
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
10
*) C = power loss into coolant, A = power loss into air, T = total power loss.
The enclosure class for all VACON
®
NX Liquid-Cooled AC drives is IP00.
***) Mains voltage 640-1200 VDC for NX_8 inverter units.
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
= 0.99 and efficiency = 97.5%.
*) c = power loss into coolant; a = power loss into air; T = total power loss.
All power losses obtained using max. supply voltage, I
th
and switching frequency of 3.6 kHz. All
power losses are worst case losses.
Table 63. Power ratings of VACON
®
NX Liquid-Cooled AFE unit, supply voltage 525-690 VAC
VACON
®
NX Liquid-Cooled Front End; DC Bus voltage 640–1100 VDC ***)
Active
front-
end type
AC Current
DC power
Power loss
c/a/T*)
[kW]
Chassis
Thermal
I
th
[A]
Rated
I
L
[A]
Rated
I
H
[A]
525 VAC
mains
I
th
[kW]
690 VAC
mains
I
th
[kW]
525 VAC
mains
I
L
[kW]
690 VAC
mains
I
L
[kW]
0170_6
170
155
113
150
198
137
180
3.6/0.2/3.8
CH61
0208_6
208
189
139
184
242
167
220
4.3/0.3/4.6
CH61
0261_6
261
237
174
231
303
210
276
5.4/0.3/5.7
CH61
0325_6
325
295
217
287
378
261
343
6.5/0.3/6.8
CH61
0385_6
385
350
257
341
448
310
407
7.5/0.4/7.9
CH62
0416_6
416
378
277
368
484
334
439
8.0/0.4/8.4
CH62
0460_6
460
418
307
407
535
370
486
8.7/0.4/9.1
CH62
0502_6
502
456
335
444
584
403
530
9.8/0.5/10.3
CH62
0590_6
590
536
393
522
686
474
623
10.9/0.6/11.5
CH63
0650_6
650
591
433
575
756
523
687
12.4/0.7/13.1
CH63
0750_6
750
682
500
663
872
603
793
14.4/0.8/15.2
CH63
0820_6
820
745
547
725
953
659
866
15.4/0.8/16.2
CH64
0920_6
920
836
613
814
1070
740
972
17.2/0.9/18.1
CH64
1030_6
1030
936
687
911
1197
828
1088
19.0/1.0/20.0
CH64
1180_6
1180
1073
787
1044
1372
949
1247
21.0/1.1/22.1
CH64
1300_6
1300
1182
867
1150
1511
1046
1374
24.0/1.3/25.3
CH64
1500_6
1500
1364
1000
1327
1744
1207
1586
28.0/1.5/29.5
CH64
1700_6
1700
1545
1133
1504
1976
1367
1796
32.1/1.7/33.8
CH64
Содержание NX
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