INSTALLATION
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5
5.4
Input chokes
The input choke carries out several functions in the Vacon NX Liquid-Cooled frequency converter. Connec-
tion of the input choke is necessary except if you have a component in your system that performs the same
tasks (e.g. a transformer). The input choke is needed as an essential component for motor control, to pro-
tect the input and DC-link components against abrupt changes of current and voltage as well as to function
as a protection against harmonics.
The input chokes are included in the standard delivery of Vacon liquid-cooled frequency converters (not
inverters). However, you can also order your frequency converter without the choke.
The Vacon chokes listed below are meant for supply voltages of 400-500 and 525-690V.
Converter types
(400—500VAC)
Converter types
(690VAC)
Choke type
Thermal
current
[A]
Nominal induc-
tance [µH] A/B*
Calculated
loss [W]
0016…0022
0012…0023
CHK0023N6A0
23
1900
145
0031…0038
0031…0038
CHK0038N6A0
38
1100
170
0045…0061
0046…0062
CHK0062N6A0
62
700
210
0072…0087
0072…0087
CHK0087N6A0
87
480
250
0105…0140
0105…0140
CHK0145N6A0
145
290
380
0168…0261
0170…0261
CHK0261N6A0
261
139/187
460
0300…0385
0325…0385
0820…1180
1850…2340
CHK0400N6A0
400
90/126
610
0460…0520
1370 (CH74)
0416…0502
1300…1500
2700…3100
CHK0520N6A0
520
65/95
810
0590…0650
1640
0590…0650
1700…1900
CHK0650N6A0
650
51/71
890
0730
2060
0750
CHK0750N6A0
750
45/61
970
0820
2300
-
CHK0820N6A0
820
39/53
1020
0920…1030
-
CHK1030N6A0
1030
30/41
1170
1150
-
CHK1150N6A0
1150
26/36
1420
2470…2950
CHK0520N6A0
520
65/95
810
3710
CHK0650N6A0
650
51/71
890
4140
CHK0750N6A0
750
45/61
970
Table 5-16. Input choke dimensioning, 6-pulse supply
Converter types written bold italic require three (3) chokes of the designated kind per unit with 6-pulse supply.