10
vacon • 156
Active front end (NXA)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
10.4
Active Front End unit technical data
The technical data for the active front end unit, see table below.
*) NX_8 AC drives only available as Ch6x AFE/BCU/INU units.
Table 61. Technical data
Mains connection
Input voltage U
in
NX_5: 400…500 VAC (–10%…+10%); 465…800 VDC
(–0%…+0%)
NX_6: 525…690 VAC (–10%…+10%); 640…1100 VDC
(–0%…+0%)
NX_8: 525…690 VAC (–10%…+10%); 640…1200 VDC
(–0%…+0%)
*)
Input frequency
45…66 Hz
Connection to mains
Once per minute or less
DC bank capacitance
Voltage class 500 V:
Voltage class 690 V:
Ch3 (16-31A units):
410 μF
Ch3 (38-61A units):
600 μF
CH4: 2400 μF
CH5: 7200 μF
CH61: 10800 μF
CH62/CH72: 10800 μF
CH63: 21600 μF
CH64/CH74: 32400 μF
2*CH64/2*CH74: 64800 μF
CH61: 4800 μF
CH62/CH72: 4800 μF
CH63: 9600 μF
CH64/CH74: 14400 μF
2*CH64/2*CH74: 28800 μF
Supply network
Networks
TN, TT, IT
Short circuit current
Maximum short circuit current has to be < 100 kA.
Rated apparent power
The rated apparent power of the supply network
including generators and/or transformers should
be greater than 50% of the total rated apparent
power of the Active Front End units which are con-
nected to the network.
DC output
connection
Voltage
1.35 x U
in
x 1.1 (default DC link voltage boosting is
110%)
Continuous output
current
Rated current at nominal inflow cooling water
temperature according to dimensioning charts.
Control
characteristics
Control method
Open Loop Vector Control
Switching frequency
NXA: Factory setting 3.6 kHz
Содержание NX
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