Ordering Numbers, 440 - 480 V; Calculation Of The Exact Filter Size Needed - Danfoss AHF 005 Instruction Manual

Ordering numbers, 440 - 480 V

I Typical Motor
AHF,N
Used [HP]
19 A 10, 15
26 A 20
35 A 25, 30
43 A 40
72 A 50, 60
101 A 75
144 A 100, 125
180 A 150
217 A 200
289 A 250
Higher ratings can be achieved by paralleling the filter units
324 A 300
397 A 350
506 A 450
578 A 500
* Please note that the matching of the typical Danfoss frequency converter and filter is pre-calculated based
on 480V and assuming typical motor load. VLT 5000 series is based on a 160 % torque application, while
VLT 6000 and 8000 series are based on 110% torque application.
The pre-calculated filter current may be varying from the input current ratings of VLT 5000, VLT 6000 and
VLT 8000 series as stated in the respective operating instructions, as these numbers are based on different
operating conditions.

Calculation of the exact filter size needed

For optimal performance the harmonic filter should
be sized for the line input current to the frequency
converter, i.e. the input current drawn based on the
expected load of the frequency converter and not
the size of the frequency converter itself!
The line input current to the frequency converter
(I ) can by calculated using the nominal motor
FC,L
) and displacement power factor (Cos
current (I
M,N
φ)) of the motor. Both data are normally printed
on the nameplate of the motor. In the case where
the nominal motor voltage (U
actual line-line voltage (U
L
MG.80.B2.02 - VLT is a registered Danfoss trademark
Danfoss ordering number
AHF 005 AHF 010
175G6612
175G6613
175G6614
175G6615
175G6616
175G6617
175G6618
175G6619
175G6620
175G6621
144 A and 180 A units
180 A and 217 A units
217 A and 289 A units
Two 289 A units
) is unequal to the
M,N
) the calculated current
AHF 005/010
Typical Danfoss frequency converter series
VLT 5000
175G6634 5011, 5016
175G6635 5022
175G6636 5027, 5032
175G6637 5042
175G6638 5052, 5062
175G6639 5072
175G6640 5102, 5125
175G6641 5150
175G6642 5200
175G6643 5250
5300
5350
5450
5500
must be corrected with the ratio between these
voltages as shown in the equation below.
The harmonic filter chosen must have a nominal
current (I ) equal to or larger than the calculated
AHF,N
frequency converter line input current (I
If several frequency converters are to be connected
to the same filter, the harmonic filter must be sized
according to the sum of the calculated line currents.
If the harmonic filter is sized for the load, and
the motor of the corresponding frequency
converter is changed, the current must be
re-calculated to avoid overload of the harmonic filter.
VLT 6000 HVAC VLT 8000 AQUA
6011, 6016 8011, 8016
6022
6027, 6032
6042
6052, 6062 8042, 8052
6072 8062, 8072
6102, 6122 8102, 8122
6150
6175
6225
6275
6350
6400
6500
).
FC,L
8022
8027
8032
8150
8200
8250
8300
8350
8450
8500
5