Danfoss AHF 005 User manual

AHF 005/010
■Contents
Safety .................................................................................................................... 2
Warnings ................................................................................................................ 2
Symbols used in this manual .................................................................................. 2
Operator’s safety .................................................................................................... 2
Avoid filter module damage .................................................................................... 2
DC-link resonance ................................................................................................. 2
Description ........................................................................................................ 3
Description ............................................................................................................. 3
Ordering numbers, 380 - 415 V, 50 Hz ................................................................... 4
Ordering numbers, 440 - 480 V, 60 Hz ................................................................... 5
Ordering numbers, 500 V, 50 Hz ............................................................................ 5
Calculation of the exact filter size needed ............................................................... 6
Specifications ................................................................................................... 7
General technical data ............................................................................................ 7
Environmental data ................................................................................................. 8
Dimensions/weight ................................................................................................. 9
Dimension diagrams ............................................................................................... 11
Installation ......................................................................................................... 14
Mechanical installation ............................................................................................ 14
Ventilation ............................................................................................................... 14
Power wiring .......................................................................................................... 15
Overtemperature contactor .................................................................................... 16
Power wiring size .................................................................................................. 17
Operation on different line type ............................................................................... 17
Typical installation in a panel or other enclosures .................................................... 19
................................................................................................................................. 20
Commissioning ...................................................................................................... 20
Appendix: Safety and application notes for ..................................... 21
1. General .............................................................................................................. 21
2. Application as directed ....................................................................................... 21
3. Transport, Storage ............................................................................................. 21
4. Installation .......................................................................................................... 21
5. Electrical Installation ........................................................................................... 21
6. Operation ........................................................................................................... 22
7. Maintenance and service ................................................................................... 22
MG.80.B4.22 - VLT is a registered Danfoss trademark 1

AHF 005/010
■Warnings
The Danfoss harmonic filters AHF 005
and AHF 010 contain dangerous voltages
when connected to line voltages. Only
a competent electrician should carry out the
electrical installation. Improper installation of the
filter module or the connected adjustable frequency
drive may cause equipment failure, serious injury, or
death. Follow this manual and National Electrical
Codes and local safety codes.
Operation of the harmonic filter is only allowed
with a closed cover of the housing!
■Symbols used in this manual
When you read this manual, you will come across
different symbols that require special attention.
The symbols used are the following:
Warning of hazardous electrical voltage
Warning of a general danger
NOTE
This designates general, useful notes. If you
observe them, handling of the filter module
/ drive system is made easier.
■Operator’s safety
After line disconnection, the power
terminals X1.1, X1.2, X1.3, X3.1, X3.2,
X3.3, X4.1, X4.2, and X4.3 remain
live for minimum 15 minutes.
The filter modules must be installed in
such a way that they fulfill their function
and do not expose persons to danger.
They must be mounted correctly and used in
accordance with their purpose.
■Avoid filter module damage
1. Thefiltermodulesaretobeusedonlywith
Danfoss adjustable frequency drives. Usage
with other electrical loads is not permitted
and may damage the devices.
2. Do not use the drive system (adjustable frequency
drive, motor load, and filter module) if the
equipment has been damaged.
3. Modifications of the filter modules are not allowed.
■DC-link resonance
To avoid resonances in the DC link, it is possible to
disable the dynamic DC link compensation.
483 Dynamic DC link compensation
(DC LINK COMP.)
Value:
Off [0]
✭On [1]
Function:
The VLT 5000, 6000, and 8000 series include a feature
which ensures that the output voltage is independent
of any voltage fluctuation in the DC link, e.g. caused
by fast fluctuation in the line supply voltage. The
benefit is a very steady torque on motor shaft (low
torque ripple) under most line conditions.
Description of choice:
In some cases, this very dynamic compensation can
cause resonances in the DC link and should then be
disabled. Typical cases are where a line choke or a
passive harmonic filter (e.g. filters AHF005/010) is
mounted in the line supply to the adjustable frequency
drive to suppress harmonics. Can also occur on line
power supplies with low short circuit ratio.
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2

AHF 005/010
Installation
■Description
The Danfoss harmonic filters AHF 005 and AHF
010 ensure near-sinusoidal line current minimizing
the harmonic current emission into the line 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
adjustable frequency drives. The filters AHF 010 and
AHF 005 are available in four voltage ratings.
•380 - 415 V AC, 50 Hz
•440 - 480 V AC, 60 Hz
•500 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
•For higher power, modules can be paralleled
•One filter module can be used for several
adjustable frequency drives
•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 components can still be achieved, but
the rated THiD values may not be achieved.
Principle connection diagram of the
Danfoss harmonic filter.
Legends (as used throughout this manual):
UL:Linevoltage
IAHF: Input current of the filter
AHF
IFC,L: Input current to the
adjustable frequency
drive
IM: Motor current
MG.80.B4.22 - VLT is a registered Danfoss trademark 3

AHF 005/010
■Ordering numbers, 380 - 415 V, 50 Hz
AHF 005 and AHF 010, 380V - 415V, 50Hz
Danfoss ordering number Typical Danfoss adjustable frequency drive seriesIAHF,N Typical Motor
Used [kW] AHF 005 AHF 010 VLT 5000 VLT 6000 HVAC VLT 8000 AQUA
10 A 4, 5.5 175G6600 175G6622 5006, 5008 6006, 6008 8006, 8008
19 A 7.5 175G6601 175G6623 5011 6011 8011
26 A 11 175G6602 175G6624 5016 6016 8016
35 A 15, 18.5 175G6603 175G6625 5022, 5027 6022, 6027 8022, 8027
43 A 22 175G6604 175G6626 5032 6032 8032
72 A 30, 37 175G6605 175G6627 5042, 5052 6042, 6052 8042, 8052
101 A 45, 55 175G6606 175G6628 5062, 5072 6062, 6072 8062, 8072
144 A 75 175G6607 175G6629 5102 6102 8102
180 A 90 175G6608 175G6630 5122 6122 8122
217 A 110 175G6609 175G6631 5152 6152 8152
289 A 132, 160 175G6610 175G6632 5202, 5252 6172, 6222 8202, 8252
324 A 175G6611 175G6633
370 A 200 175G6688 175G6691 5302 6272 8302
Higher ratings can be achieved by paralleling the filter units
434 A 250 Two 217A units 5352 6352 8352
578 A 315 Two 289 A units 5452 6402 8452
613 A 355 289 A and 324 A units 5502 6502 8502
648 A 400 Two 324 A units 6552 8602
Please note that the matching of the typical Danfoss adjustable frequency drive and filter is pre-calculated
based on 400V and assuming typical motor load (4- or 2-pole motor). VLT 5000 series is based on a max.
160 % torque application, while VLT 6000 and 8000 series are based on a max. 110% torque application.
The pre-calculated filter current may be different than the input current ratings of the VLT 5000, VLT 6000,
and VLT 8000 series as stated in the respective instruction manuals, as these numbers are based on
different operating conditions.
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4

AHF 005/010
Installation
■Ordering numbers, 440 - 480 V, 60 Hz
Danfoss ordering number Typical Danfoss adjustable frequency drive seriesIAHF,N Typical Motor
Used [HP] AHF 005 AHF 010 VLT 5000 VLT 6000 HVAC VLT 8000 AQUA
19 A 10, 15 175G6612 175G6634 5011, 5016 6011, 6016 8011, 8016
26 A 20 175G6613 175G6635 5022 6022 8022
35 A 25, 30 175G6614 175G6636 5027, 5032 6027, 6032 8027, 8032
43 A 40 175G6615 175G6637 5042 6042 8042
72 A 50, 60 175G6616 175G6638 5052, 5062 6052, 6062 8052, 8062
101 A 75 175G6617 175G6639 5072 6072 8072
144 A 100, 125 175G6618 175G6640 5102, 5122 6102, 6122 8102, 8122
180 A 150 175G6619 175G6641 5152 6152 8152
217 A 200 175G6620 175G6642 5202 6172 8202
289 A 250 175G6621 175G6643 5252 6222 8252
324 A 300 175G6689 175G6692 5302 6272 8302
370 A 350 175G6690 175G6693 5352 6352 8352
Higher ratings can be achieved by paralleling the filter units
506 A 450 217 A and 289 A units 5452 6402 8452
578 A 500 Two 289 A units 5502 6502 8502
648 A 600 Two 324 A units -6552 8602
Please note that the matching of the typical Danfoss adjustable frequency drive 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 vary from the input current ratings of the VLT 5000, VLT 6000, and
VLT 8000 series as stated in the respective instruction manuals, as these numbers are based on different
operating conditions.
■Ordering numbers, 500 V, 50 Hz
Danfoss ordering number Typical Danfoss adjustable frequency drive seriesIAHF,N Typical Motor
Used [kW] AHF 005 AHF 010 VLT 5000 VLT 6000 HVAC VLT 8000 AQUA
10 A 4, 5.5 175G6644 175G6656 5006, 5008 6006, 6008 8006, 8008
19 A 7.5, 11 175G6645 175G6657 5011, 5016 6011, 6016 8011, 8016
26 A 15, 18.5 175G6646 175G6658 5022, 5027 6022, 6027 8022, 8027
35 A 22 175G6647 175G6659 5032 6032 8032
43 A 30 175G6648 175G6660 5042 6042 8042
72 A 37, 45 175G6649 175G6661 5052, 5062 6052, 6062 8052, 8062
101 A 55, 75 175G6650 175G6662 5062, 5072 6062, 6072 8062, 8072
144 A 90, 110 175G6651 175G6663 5102, 5122 6102, 6122 8102, 8122
180 A 132 175G6652 175G6664 5152 6152 8152
217 A 160 175G6653 175G6665 5202 6172 8202
289 A 200 175G6654 175G6666 5252 6222 8252
324 A 250 175G6655 175G6667 5302 6302 8302
Higher ratings can be achieved by paralleling the filter units
434 A 315 Two 217 A units 5352 6352 8352
469 A 355 180 A and 289 A units 5452 6402 8452
578 A 400 Two 289 A units 5502 6502 8502
Please note that the matching of the typical Danfoss adjustable frequency drive and filter is pre-calculated
based on 500V 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 vary from the input current ratings of the VLT 5000, VLT 6000, and
VLT 8000 series as stated in the respective instruction manuals, as these numbers are based on different
operating conditions.
MG.80.B4.22 - VLT is a registered Danfoss trademark 5

AHF 005/010
■Ordering numbers, 690 V 50 Hz
Danfoss ordering number Typical Danfoss adjustable frequency
drive series
IAHF,N Typical Motor
Used [kW] AHF 005 AHF 010 VLT 5000 160 % VLT 8000 HVAC
43 A 37, 45 130B2328 130B2293 5042, 5052 8052
72 A 55, 75 130B2330 130B2295 5062, 5072 8062, 8072
101 A 90 130B2331 130B2296 5102 8102
144 A 110, 132 130B2333 130B2298 5122, 5152 8122, 8152
180 A 160 130B2334 130B2299 5202 8202
217 A 200 130B2335 130B2300 5252 8252
289 A 250 130B2331 &
130B2333
130B2301 5302 8302
324 A 315 130B2333 &
130B2334
130B2302 5352 8352
370 A 400 130B2334 &
130B2335
130B2304 8402
Please note that the matching of the typical Danfoss adjustable frequency drive and filter is pre-calculated
based on 500V and assuming typical motor load. VLT 5000 series is based on a 160 % torque application,
while the VLT 8000 series are based on 110% torque application.
The pre-calculated filter current may vary from the input current ratings of VLT 5000 and VLT 8000 series as
stated in the respective instruction manuals, 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 adjustable
frequency drive, i.e. the input current drawn based on
the expected load of the adjustable frequency drive
and not the size of the adjustable frequency drive itself!
The line input current to the adjustable frequency
drive (IFC,L) can by calculated using the nominal motor
current (IM,N) and displacement power factor (Cos
φ)) of the motor. Both data are normally printed
on the nameplate of the motor. In the case where
the nominal motor voltage (U M,N) is unequal to the
actual line-line voltage (UL), the calculated current
must be corrected with the ratio between these
voltages as shown in the equation below.
The harmonic filter chosen must have a nominal current
(IAHF,N ) equal to or larger than the calculated adjustable
frequency drive line input current (IFC,L).
If several adjustable frequency drives 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 adjustable
frequency drive is changed, the current must
be re-calculated to avoid overload of the harmonic filter.
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6

AHF 005/010
Programming
■General technical data
AHF 0xx AHF 0xx AHF 0xx AHF 0xx
Nominal supply
voltage
UL,N [V] 380 ≤UL,N ≤
415
440 ≤UL,N ≤
480
500 V 690 V
Tolerance of the
actual supply
voltage
UL[V] 342 ≤UL≤456 396 ≤UL≤528 450 ≤UL≤550 621 ≤UL≤759
Supply
frequency
fL,N[Hz] 50 ± 5 % 60 ± 5 % 50 ± 5 % 50 ± 5 %
Overload
capability
1.6 for 60s
Efficiency η[%] ~98.8%
THiD [%] AHF 005 < 5%
AHF 010 < 10%
cos φof IL0.5 cap
0.8 cap
0.85 cap
0.99 cap
1.00
at 25% IAHF,N
at 50% IAHF,N
at 75% IAHF,N
at 100% IAHF,N
at 150% IAHF,N
Power derating [%/C]
[%/m]
104°F < Ta < 131°F => 1.5%/F (40°C < Ta < 55°C
=> 3%/C)
3280 ft altitude above sea level < h ≤13,100 ft
altitude above sea level => 5% / 3280 ft (1000m
altitude above sea level.< h ≤4000m altitude above
sea level => 5%/1000m)
NOTE
The reduction of the low harmonic current
emission to the rated THiD implies that the
THvD of the non-influenced line voltage is
lower than 2% and the ratio of short circuit power
toinstalledload(RSCE ) is at least 66. Under these
conditions, the THiD of the line current of the adjustable
frequency drive is reduced to 10% or 5% (typical
values at nominal load). If these conditions are not
or only partially fulfilled, a significant reduction of the
harmonic components can still be achieved, but the
rated THiD values may not be achieved.
MG.80.B4.22 - VLT is a registered Danfoss trademark 7

AHF 005/010
■Environmental data
Permissible
temperature range*
During transport of the unit:
During storage of the unit:
During operation of the unit:
-13°F...+158°F (-25°C...+70°C) (to
VDE 0160)
-13°F...+131°F (-25°C...+55°C) (to
VDE 0160)
41°F...+104°F (5°C...+40°C) without
power derating
41°F...+131°F (5°C...+55°C) with
power derating
Humidity class* Humidity class F without condensation ( 5% - 85% relative humidity)
Installation height h* H≤3280 m altitude above sea level
3280 ft (1000 m) altitude above sea
level< h ≤13,100 ft (4000 m) altitude
above sea level
without power derating
with power derating
Degree of pollution VDE 0110 Part 2 degree 2
Insulation strength Overvoltage category III according to VDE 0110
Packaging DIN 55468 for transport packaging materials
Type of protection IP 20
Approvals CE: Low-Voltage Directive; UL; C-tick
*climatic conditions according to class 3K3
(EN 50178 Part 6.1)
MG.80.B4.22-VLTisaregisteredDanfosstrademark
8

AHF 005/010
Programming
■Dimensions/weight
The AHF modules are available in seven frame sizes (size B to H).
For dimensions, see the drawings on the following pages
AHF 005, 380 - 415 V AC, 50Hz AHF 010, 380- 415 V AC, 50Hz
IAHF,N Frame
size Weight IAHF,N Frame size Weight
10 A B20 Kg (44 lbs) 10 A B15 Kg (33 lbs)
19 A C31 Kg (68 lbs) 19 A B19 Kg (42 lbs)
26 A C31 Kg (68 lbs) 26 A B24 Kg (53 lbs)
35 A C49 Kg (108 lbs) 35 A C38 Kg (84 lbs)
43 A D60 Kg (132 lbs) 43 A C45 Kg (99 lbs)
72 A D81 Kg (179 lbs) 72 A D64 Kg (141 lbs)
101 A E128 Kg (282 lbs) 101 A D80 Kg (176 lbs)
144 A E165 Kg (364 lbs) 144 A D101 Kg (223 lbs)
180 A F197 Kg (434 lbs) 180 A E134 Kg (295 lbs)
217 A F228 Kg (503 lbs) 217 A E159 Kg (351 lbs)
289 A G269 Kg (593 lbs) 289 A F180 Kg (397 lbs)
324 A G309 Kg (681 lbs) 324 A F233 Kg (514 lbs)
370 A H345 Kg (761 lbs) 370 A G252 Kg (556 lbs)
AHF 005, 440 - 480 V AC, 60Hz AHF 010, 440 - 480 V AC, 60Hz
IAHF,N Frame
size Weight IAHF,N Frame size Weight
19 A B32 kg (71 lbs) 19 A B20 kg (44 lbs)
26 A B43 kg (95 lbs) 26 A B25 kg (55 lbs)
35 A C50 kg (110 lbs) 35 A C38 kg (84 lbs)
43 A C60 kg (132 lbs) 43 A C45 kg (99 lbs)
72 A D82 kg (181 lbs) 72 A D64 kg (141 lbs)
101 A D129 kg (284 lbs) 101 A D81 kg (179 lbs)
144 A D167 kg (368 lbs) 144 A E103 kg (227 lbs)
180 A E200 kg (441 lbs) 180 A E135 kg (298 lbs)
217 A E230 kg (507 lbs) 217 A E161 kg (355 lbs)
289 A F272 kg (600 lbs) 289 A F191 kg (421 lbs)
324 A F306 kg (675 lbs) 324 A F232 kg (511 lbs)
370 A G348 kg (767 lbs) 370 A G245 kg (540 lbs)
MG.80.B4.22 - VLT is a registered Danfoss trademark 9

AHF 005/010
AHF 005, 500 V AC, 50Hz AHF 010, 500 V AC, 50Hz
IAHF,N Frame
size Weight IAHF,N Frame size Weight
10 A B22 Kg (49 lbs) 10 A B17 Kg (37 lbs)
19 A C35 Kg (77 lbs) 19 A B21 Kg (46 lbs)
26 A C49 Kg (108 lbs) 26 A B28 Kg (62 lbs)
35 A C55 Kg (121 lbs) 35 A C42 Kg (93 lbs)
43 A D67 Kg (148 lbs) 43 A C47 Kg (104 lbs)
72 A D82 Kg (181 lbs) 72 A D69 Kg (152 lbs)
101 A E144Kg(317lbs) 101 A D91 Kg (201 lbs)
144 A E187Kg(412lbs) 144 A E131 Kg (289 lbs)
180 A F226Kg(498lbs) 180 A E147 Kg (324 lbs)
217 A F262Kg(578lbs) 217 A F185 Kg (408 lbs)
289 A G309Kg(681lbs) 289 A F209 Kg (461 lbs)
324 A G348Kg(767lbs) 324 A F256 Kg (564 lbs)
AHF 005, 690V AC, 50Hz AHF 010, 690 V AC, 50Hz
IAHF,N Frame
size Weight IAHF,N Frame size Weight
43 A D85 kg (187 lbs) 43 A D65 kg (143 lbs)
72 A E100 kg (220 lbs) 72 A D75 kg (165 lbs)
101 A F130 kg (287 lbs) 101 A E95 kg (209 lbs)
144 A G160 kg (353 lbs) 144 A E125 kg (276 lbs)
180 A G200 kg (441 lbs) 180 A F140 kg (309 lbs)
217 A H300 kg (661 lbs) 217 A G180 kg (397 lbs)
289 A G200 kg (441 lbs)
324 A H250 kg (551 lbs)
370 A H300 kg (661 lbs)
MG.80.B4.22-VLTisaregisteredDanfosstrademark
10

AHF 005/010
Programming
■Dimension diagrams
FramesizeB
FramesizeC
FramesizeD
MG.80.B4.22 - VLT is a registered Danfoss trademark 11

AHF 005/010
FramesizeE
Frame size F
MG.80.B4.22-VLTisaregisteredDanfosstrademark
12

AHF 005/010
Programming
Frame size G
FramesizeH
NOTE
Please allow an additional 1.18 in (30 mm) of
depth of the filter for the mounting feet.
NOTE
For frames E-H, only transport the filter vertically,
i.e. use lifting hooks on both ends.
MG.80.B4.22 - VLT is a registered Danfoss trademark 13

AHF 005/010
■Mechanical installation
The encapsulation of the filters has an IP 20
rating. The modules can be mounted side-by-side
with 2.36 in. (60mm) clearance.
To other components and to the cabinet walls, maintain
a horizontal clearance of at least 2.76 in. (70mm) and a
vertical clearance of at least 5.91 in. (150mm).
Only vertical installation is allowed (line
terminal at bottom).
For versions with bus bars (frame size
E - H), it is necessary to mount the
added covers to the connectors in order
to achieve the protection type IP 20.
■Ventilation
The filters are cooled by means of air circulation.
Consequently, the air needs to be able to move freely
above and below the filter module. The efficiency
of the filter modules is greater than 0.98. When
installing a filter module in a panel or another enclosure,
ensure there is sufficient airflow through the enclosure
to limit heat rise in the enclosure.
AHF 0xx, 380 – 415V
Max. Heat AHF 0xx, 440 – 480V Max. Heat AHF 0xx, 500V Max. Heat AHF 0xx, 690V Max. Heat
10 A 283 Btu/hr (83 W) 355 Btu/hr (104 W)
19 A 540Btu/hr(158W) 649 Btu/hr (190 W) 672 Btu/hr (197 W)
26 A 738Btu/hr(216W) 884 Btu/hr (259 W) 922 Btu/hr (270 W)
35 A 990Btu/hr(290W) 1192 Btu/hr (349 W) 1243Btu/hr(364W)
43 A 1223 Btu/hr (358 W) 1465 Btu/hr (429 W) 1526Btu/hr(447W) 2107 Btu/hr (617 W)
72 A 2046 Btu/hr (599 W) 2452 Btu/hr (718 W) 2554Btu/hr(748W) 3528 Btu/hr (1033 W)
101 A 2869 Btu/hr (840 W) 3442 Btu/hr (1008 W) 3586 Btu/hr (1050 W) 4945 Btu/hr (1448 W)
144 A 4088 Btu/hr (1197 W) 4907 Btu/hr (1437 W) 5109 Btu/hr (1496 W) 7052 Btu/hr (2065 W)
180 A 5109 Btu/hr (1496 W) 6133 Btu/hr (1796 W) 6389 Btu/hr (1871 W) 8814 Btu/hr (2581 W)
217 A 6161 Btu/hr (1804 W) 7393 Btu/hr (2165 W) 7701 Btu/hr (2255 W) 10,627 Btu/hr (3112
W)
289 A 8206 Btu/hr (2403 W) 9845 Btu/hr (2883 W) 10,255 Btu/hr (3003
W)
14,155 Btu/hr (4145
W)
324 A 9200 Btu/hr (2694 W) 11,037 Btu/hr (3232
W)
11,498 Btu/hr (3367
W)
15,866 Btu/hr (4646
W)
370 A 10,504 Btu/hr (3076
W)
12,605 Btu/hr (3691
W)
18,120 Btu/hr (5306
W)
NOTE
If other heat sources (e.g. Danfoss
adjustable frequency drives) are installed in
an enclosure with the harmonic filter AHF
0xx, this heat generation must also be considered
when calculating required airflow
NOTE
If the cooling air is polluted (dust, dirt swirl,
grease, aggressive gas), the function of
the filter module may be impeded. Ensure
sufficient countermeasures, e.g. separate cooling air,
mounting of air filters, periodical cleaning.
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14

AHF 005/010
All about VLT 8000
AQUA
■Power wiring
Standard connection
Supply voltage must be connected to the terminals
X1.1, X1.2 and X1.3. The adjustable frequency drive
supply terminals L1, L2, and L3 must be connected to
the filter module terminals X2.1, X2.2, and X2.3.
Paralleling of AFDs
If several adjustable frequency drives are to be
connected to the harmonic filter, the connection
is similar to the standard connection - The supply
terminals L1, L2 and L3 of several adjustable
frequency drives must be connected to the filter
module terminals X2.1, X2.2 and X2.3.
NOTE
If several AFDs are to be connected to
the same filter, the harmonic filter must
besizedaccordingtothesumofthe
calculated input current to the AFDs.
Paralleling of filters
If the line input current of the adjustable frequency drive
exceeds the nominal current of the largest harmonic
filter, several harmonic filters can be paralleled to
achieve the necessary rating. Supply voltage must
be connected to the terminals X1.1, X1.2 and X1.3
of the filters. The adjustable frequency drive supply
terminals L1, L2 and L3 must be connected to the
filter modules terminals X2.1, X2.2 and X2.3.
NOTE
Filters of different current ratings can be
paralleled. The rating of the filter becomes the
sum of the individual current ratings.
Capacitor disconnect
The power factor of the harmonic filter AHF 005/010
decreases with decreasing load. At zero load, the
power factor becomes zero and the capacitors produce
approximately 30% leading current compared to the
rated current of the filter. The reactive current generated
by the filter at partial load is normally not of any concern,
mainly because of the small current compared to the
system capacity (max 30%) as well as the fact that other
load normally compensates the capacitive current.
In applications where this reactive current may not be
accepted, Terminals X3.1, X3.2, X3.3 and X4.1, X4,
X4.3 give access to the filter capacitors. By default
(on delivery), the wiring will shorten Terminal X3.1
with X4.1, X3.2 with X4.2 and X3.3 with X.4.3. In
the case that no capacitor disconnect is required, no
changes should be made. If capacitor disconnect
is required, a three-phase contactor should be
placed between terminals X3 and X4. Size the
contactor and wiring to 50% of the nominal current
and use the AC3 rating of the contactor
NOTE
Only switch the contactor at less than 20% load.
Allow minimum 5 minutes for the capacitors
to discharge before turning on again.
Use cables complying with local regulations.
MG.80.B4.22 - VLT is a registered Danfoss trademark 15

AHF 005/010
■Overtemperature contactor
The Danfoss harmonic filter AHF 005 and AHF 010 is equipped with a galvanically isolated contactor that is
closed under normal operating conditions and open if the filter is overheated. This contactor must be used to
prevent damages to the filter caused by overtemperature as shown in the following example.
Example: Connect terminal A of the harmonic filter
to terminal 12 or 13 (voltage supply digital input,
24V) of the Danfoss adjustable frequency drive
and terminal B to terminal 27 (digital input "Coast
Inverse"); the adjustable frequency drive will let go of
the motor (coasting) and thereby unload the filter if an
overtemperature is detected.
NOTE
The maximum rating of the overtemperature
contactor is 250V AC and 10A.
MG.80.B4.22-VLTisaregisteredDanfosstrademark
16

AHF 005/010
All about VLT 8000
AQUA
■Power wiring size
Power wiring size
Enclosure Max. cable size, in2
(mm2)Type Nom. Fix Torque
B0.025 (16) Connector 1.5 ft-lb (2 Nm)
CandD 0.078 (50) Connector 4.4 ft-lb (6 Nm)
E, F, G and H Bus Bars 18 ft-lb (25 Nm)
Overheat contactor (copper)
Enclosure Max. cable size, in2
(mm2)Type Nom. Fix Torque
0.0062 (4) Connector 0.4 ft-lb (0.6 Nm)
Capacitor disconnect (copper)
Enclosure Max. cable size, in2
(mm2)Type Nom. Fix Torque
B0.0062 (4) Connector 0.4 ft-lb (0.6 Nm)
CandD 0.025 (16) Connector 1.5 ft-lb (2 Nm)
E, F, G and H 0.078 (50) Connector 4.4 ft-lb (6 Nm)
*Power wiring used for connecting the filter AHF 005
and AHF 010 in enclosure size E, F and G must
be terminated with cable lugs that can be attached
to the input and output bus bars terminals. This
type of termination imposes no specifications on
the minimum and maximum cable size suitable for
connection. Power terminal details regarding the bus
bars can be found in the figures below.
Frame E Frame F Frame G, Frame H
NOTE
For UL approval, use copper conductor only.
■Operation on different line type
Line type Operation of the filter module
TN Directly grounded star point Allowed
TN Indirectly grounded star point Allowed
IT Isolated star point Allowed
MG.80.B4.22 - VLT is a registered Danfoss trademark 17

AHF 005/010
The filter module has been designed completely
symmetrically for three-phase operation and without
reference to the star point or protective ground.
MG.80.B4.22-VLTisaregisteredDanfosstrademark
18

AHF 005/010
All about VLT 8000
AQUA
■Typical installation in a panel or other enclosures
To avoid high frequency noise coupling, keep a
minimum distance of 5.91 in. (150 mm) to:
a) AC line/supply wires
b) motor wires of adjustable frequency drive
c) control and signal wires (voltage range < 48 V)
To obtain low resistive HF connections, grounding,
shielding, and other metallic connections (e. g.
mounting plates, mounted units) should have a
surface as large as possible to metallic ground.
Use grounding and potential equalization wires with
as large a cross-section as possible (min. 0.015
in.² /10mm²) or thick grounding tapes.
Use copper or tinned copper shielded wires only, as
steel shielded wires are not suitable for high frequency
applications. Connect the shield with metal clamps or
metal glands to the equalization bars or PE connections.
Inductive switching units (relay, magnetic contactor,
etc.) must always be equipped with varistors,
RC circuits, or suppressor diodes.
1. Panel
2. Line supply wire
3. Motor wiring
4. Control wiring
5. Wiring between harmonic filter and adjustable
frequency drive
6. Lines supply wire of filter module
7. Mounting plate (common star point)
8. Potential equalization
9. Filter module AHF 0xx
10. Line connection
11. PLC
12. Adjustable frequency drive
13. Line fuses
14. Line circuit breaker
MG.80.B4.22 - VLT is a registered Danfoss trademark 19

AHF 005/010
■Commissioning
Prior to initial switch-on of the filter module,
check the wiring for completeness, short
circuit, and ground fault.
If the wiring is not correct, an unintentional
operation of controller and/or filter
module is possible.
Initial power-up
1. Switch on line supply :
- The filter module is ready for operation at once.
2. Check the readiness of the adjustable
frequency drive:
- Proceed in accordance with the instruction
manual of the adjustable frequency drive.
MG.80.B4.22-VLTisaregisteredDanfosstrademark
20