VLT® Power options

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Power options are designed to ensure the best possible reliability and efficiency for AC drives in system configurations where high attention is paid to power quality.

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VLT® Advanced Harmonic Filter AHF 005 and AHF 010

Optimized harmonic performance for VLT® drives rated up to 250 kW
A patented technique reduces THD levels in the mains network to less than 5–10%
Perfect match for industrial automation, highly dynamic applications and safety installations
Line voltage and filter current:
- 3 x 380/400/500/600/690 V...10-480 A*
  * Achieve higher ratings by connecting in parallel. See AHF 005 or AHF 010 Design Guide for details.
Enclosure ratings:
- IP20 (An IP21/NEMA 1 upgrade kit is available)

VLT® Sine-wave Filter MCC 101

VLT® Sine-wave Filters are positioned between the AC drive and the motor to provide a sinusoidal phase-to-phase motor voltage
Reduces motor insulation stress
Reduces acoustic noise from the motor
Reduces bearing currents (especially in large motors)
Reduces losses in the motor
Prolongs service lifetime
VLT® FC series family look
Line voltage and filter current:
- 3 x 200 – 690 V, 2.5 – 800 A*
  * For higher power ratings, combine multiple modules.
Enclosure ratings:
- IP00 and IP20 wall-mounted enclosures rated up to 75 A (500 V) or 45 A (690 V)
- IP23 floor-mounted enclosures rated 115 A (500 V) or 76 A (690 V) or more
- IP54 both wall-mounted and floor-mounted enclosures rated up to 4.5 A, 10 A, 22 A (690 V)

VLT® dU/dt Filter MCC 102

Reduces the dU/dt values on the motor terminal phase-to-phase voltage
Positioned between the AC drive and the motor to eliminate very fast voltage changes
The motor terminal phase-to-phase voltage is still pulse shaped but its dU/dt values are reduced
Reduces stress on the motor’s insulation and are recommended in applications with older motors, aggressive environments or frequent braking which cause increased DC link voltage
VLT® FC series family look
Line voltage and filter current:
- 3 x 200 – 690 V ... 15-880 A*
  * For higher power ratings, combine multiple modules.
Enclosure ratings:
- IP00 and IP20/IP23 enclosure in the entire power range
- IP54 enclosure available up to 177 A

VLT® Common Mode Filter MCC 105

Positioned between the AC drive and the motor
They are nano-crystalline cores that mitigate high frequency noise in the motor cable (shielded or unshielded) and reduce bearing currents in the motor
Extends motor bearing lifetime
Can be combined with dU/dt and sine-wave filters
Reduces radiated emissions from the motor cable
Reduces electromagnetic interference
Easy to install – no adjustments necessary
Oval shaped – allows mounting inside the frequency converter enclosure or motor terminal box
Line voltage and filter current:
- 3 x 380-690 V........... 10-480 A

VLT® Brake Resistor MCE 101

Energy generated during braking is absorbed by the resistors, protecting electrical components from heating up
Optimized for the FC-series and general versions for horizontal and vertical motion are available
Built-in thermo switch
Versions for vertical and horizontal mounting
A selection of the vertically mounted units are UL-recognized
Power range:
- Precision electrical match to each individual VLT^® drive power size for FC 102, FC 202, FC 301 and FC 302

Enclosure ratings:
- IP20
- IP21
- IP54
- IP65

VLT® Line Reactor MCC 103

Ensures current balance in load-sharing applications, where the DC-side of the rectifier of multiple drives is connected together
UL-recognized for applications using load sharing
When planning load-sharing applications, pay special attention to different enclosure type combinations and inrush concepts
For technical advice regarding load-sharing applications, contact Danfoss application support
Compatible with:
- VLT® AutomationDrive, VLT® AQUA Drive and VLT® HVAC Drive
- 50 Hz or 60 Hz mains supply

Documents

Documents
Type	Name	Language	Valid for	Updated	Download	File type
Design guide	VLT Brake Resistor MCE 101	English	Multiple	13 Sep, 2016	6.7 MB	PDF
Design guide	VLT® Advanced Harmonic Filter AHF005/010	English	Multiple	01 Feb, 2022	6.2 MB	PDF
Design guide	VLT® Brake Resistor MCE 101	English	Multiple	08 May, 2014	8.5 MB	PDF
Design guide	VLT® FC Series Output Filter Design G.	English	Multiple	22 Feb, 2011	4.8 MB	PDF