Installation vacon • 69
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5
5.4 Input chokes
The input choke carries out several functions in the VACON
®
NX Liquid-Cooled AC drive. Connection
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 protect the input and DC-link components against abrupt changes of current and voltage
as well as to function as a protection against harmonics. In chasses with multiple parallel line
rectifiers (CH74) AC-chokes are required to balance the line current between the rectifiers.
The input chokes are included in the standard delivery of VACON
®
Liquid-Cooled AC drives (not
inverters). However, you can also order your AC drive without the choke.
The VACON
®
chokes listed below are meant for supply voltages of 400-500 V and 525-690 V.
Table 30. Input choke dimensioning, 6-pulse supply
AC drive types
(400—500 VAC)
AC drive types
(690 VAC)
Choke type
Thermal
current
[A]
Nominal
inductance [0H]
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
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
AC drive types written bold italic require three (3) chokes of the designated kind per unit
with 6-
pulse supply.
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