Harmonic filter
Harmonic currents do not directly affect the electricity
consumption but has an impact on following condi-
tions:
Higher total current to be handled by the installations
-
Increases load on transformer (sometimes it
will require a larger transformer, particular at
retrofit)
-
Increases heat losses in transformer and in-
stallation
-
In some cases demands larger cables,
switches and fuses
Higher voltage distortion due to higher current
-
Increase risk for disturbing electronic equip-
ment connected to same grid
A high percentage of rectifier load from eg frequency
converters, will increase the harmonic current, which
must be reduced to avoid the above consequences.
Therefore the frequency converter has as standard,
built in DC coils reducing the total current with about
40% (compared to devices without any arrangement
for harmonic suppression), down to 40-45% ThiD.
In some cases there is a need for further suppression
(eg retrofit with frequency converters). For this pur-
pose Danfoss can offer two advanced harmonic filters
AHF05 and AHF10, bringing the harmonic current
down to around 5% and 10% respectively. For further
details see instruction MG.80.BX.YY.
Ordering numbers, Harmonic filters
Harmonic filters are used to reduce mains harmonics
• AHF 010: 10% current distortion
• AHF 005: 5% current distortion
380-415V, 50Hz
I
AHF,N
Typical Motor Used
[kW]
Danfoss ordering number
VLT 6000
AHF 005
AHF 010
10 A
4, 5.5
175G6600
175G6622
6006, 6008
19 A
7.5
175G6601
175G6623
6011
26 A
11
175G6602
175G6624
6016
35 A
15, 18.5
175G6603
175G6625
6022, 6027
43 A
22
175G6604
175G6626
6032
72 A
30, 37
175G6605
175G6627
6042, 6052
101 A
45. 55
175G6606
175G6628
6062, 6072
144 A
75
175G6607
175G6629
6102
180 A
90
175G6608
175G6630
6122
217 A
110
175G6609
175G6631
6152
289 A
132, 160
175G6610
175G6632
6172, 6222
324 A
175G6611
175G6633
370 A
200
175G6688
175G6691
6272
Higher ratings can be achieved by paralleling the filter units
434 A
250
Two 217 A units
6352
578 A
315
Two 289 A units
6402
613 A
355
289 A and 324 A units
6502
648 A
400
Two 324 A units
6552
648 A
450
Two 324 A units
6602
VLT
®
6000 HVAC Series
MG.61.B5.02 - VLT
®
is a registered Danfoss trademark
41
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Содержание VLT 6000 HVAC Series
Страница 31: ...Ordering form VLT 6000 HVAC Series MG 61 B5 02 VLT is a registered Danfoss trademark 31 Introduction to HVAC ...
Страница 63: ...Mechanical dimensions VLT 6000 HVAC Series MG 61 B5 02 VLT is a registered Danfoss trademark 63 Installation ...
Страница 75: ...VLT 6000 HVAC Series MG 61 B5 02 VLT is a registered Danfoss trademark 75 Installation ...
Страница 204: ...VLT 6000 HVAC Series 204 MG 61 B5 02 VLT is a registered Danfoss trademark ...