2 Ordering Numbers
2.1.1 Description
The Danfoss harmonic filters AHF 005 and AHF 010 are ensuring near sinusoidal mains current, minimising the harmonic current emission into the mains
supply. The Danfoss AHF 005 and AHF 010 are advanced harmonic filters not to be compared with traditional harmonic trap filters. The Danfoss harmonic
filters have been specially designed to match all the Danfoss frequency converters. The filters AHF 010 and AHF 005 are available in five voltage versions.
•
380 - 415 V AC, 50 Hz
•
380 - 415 V AC, 60 Hz
•
440 - 480 V AC, 60 Hz
•
500 - 525 V AC, 50 Hz
•
690 V AC, 50 Hz
The Danfoss AHF 010 and AHF 005 have the following characteristics:
•
Small compact housing that fits into a panel
•
Easy to use in retrofit applications
•
AHF 010 reduces the total harmonic current distortion to 10%
*
•
AHF 005 reduces the total harmonic current distortion to 5%
*
•
Current rating from 10A - 370A
•
AHF Filters can be paralleled for higher power modules
•
One filter module can be used for several frequency converters
•
High efficiency (> 0.98)
•
User-friendly commissioning - no adjustment necessary
•
No routine maintenance required
*
THiD of 10% or 5% will be achieved when the following conditions are met:
-
THvD of the system without the drive operating is less than 2%
-
Filter is operating at nominal load
If these conditions are not fulfilled, a significant reduction of the harmonic distortion can still be achieved, but the rated THiD values may not be achieved.
The mains quality has to be according to EN61000-2-4 level 3, allowing a maximum THvD level of 10%.
Illustration 2.1: Principle connection diagram of the AHF harmonic filter.
U
L
:
Mains voltage
I
AHF
:
Input current of the filter AHF
I
FC,L
:
Input current to the frequency converter
I
M
:
Motor current
Table 2.1: Legends (as used throughout this manual):
AHF 005/010 Operating Instructions
2 Ordering Numbers
MG.80.C2.02 - VLT
®
is a registered Danfoss trademark
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