VLT® 12-Pulse Drive

  • Robust and cost effective harmonic solution for the higher power range

    The VLT®12-pulse drive is a high efficiency variable frequency converter which is built with the same modular design as the popular VLT® 6-pulse drives. It is offered with similar drive options and accessories and can be configured according to customer need.

  • Overview

    The Danfoss VLT® 12-Pulse drive offers reduced harmonics for demanding industry applications above 250 kW.


    Together with the needed 30°-phase shifting transformer the solution provides durability and reliability at a low cost.

    Power Range
    250 kW – 1.4 MW (FC 302)
    315 kW - 1.4 MW (FC 102/FC 202)

    Voltage Range
    380 – 690 VAC 50-60 Hz

  • Features & Benefits

    • Robust and highly stable in all network and operating conditions 
    • Natural harmonic cancellation 
    • Excellent input transient immunity 
    • Good harmonic current reduction 
    • No special controls required 
    • The standard LCP and programming make commissioning easy 
    • High efficiency thanks to DC link inductors 
    • Back channel cooling reduces cooling loads and improves the efficiency 
    • Easy maintenance thanks to the modular design 
    • The compact design with zero clearance mounting minimizes the use of floor space

    Specifications

    Harmonic mitigation performance:
    12% THD

    True Power Factor:
    >0.98

    Displacement Factor:
    >0.98

    PC Software & User Interface:
    - Commissioning tool function
    - Configuration and installationsettings function
    - User settings and information function
    - Control panel function
    - Data logger and event log function - Network monitoring and measurement function
    - Filter load and status function
    - Software update function

    LCP Regulation:
    - UL-fi e. CE marking, cULus (UL508C) and c-tick (AS/NZS 2064)- IEEE519 / EN61000-3-xx harmonic mitigation guidelines
    - IEEE587/ANSI C62.41/ EN61000-4-5surge immunity
    - EN55011 electromagnetic compatibility
    - EN50178, EN60146 safety/design

    Ambient temperature:
    -10° C to +45° C, up to 3280 feet above sea level, with relative humidity of 5% – 85% RH, class 3K3 (functions to be maintained up to 95% RH not condensing)

    Power Fuses:
    Optional

    RFI filtering:
    Class A2 RFI; Class A1 RFI optional

    Cooling:
    Air cooled with primary cooling through back channel

    RoHS compliant:
    The VLT 12-Pulse Drive is manufactured with respect for the environment and comply with the RoHS directive.

    Enclosure

    • IP 21/NEMA Type 1
    • IP 54/NEMA Type 12

    Options

    The following options are available:

    • RFI filters
    • Disconnect
    • Fuses
    • Mains shielding
    • Feedback and I/O options
    • Fieldbus options
    • dV/dt filters
    • Sine wave filters

    PC software

    VLT® Motion Control Tool MCT 10 offers advanced programming functionality for all Danfoss drive products, greatly reducing programming and set-up time.

    MCT 10 Basic allows access to a finite number of drives with limited functionality.

    Calculation Software

    With VLT® Motion Control Tool MCT 31 you can determine whether harmonics will be an issue in your installation when drives are added.

    MCT 31 estimates the benefits of adding various harmonic mitigation solutions from the Danfoss product portfolio and calculates system harmonic distortion.

    More

    The Danfoss VLT 12-Pulse Drive offers reduced harmonics for demanding industry applications above 250 kW. 


    The VLT 12-Pulse Drive is a high efficiency variable frequency converter which is built with the same modular design as the popular 6-pulse VLT drives. It is offered with similar drive options and accessories and can be configured according to customer need.

    Together with the needed 30°-phase shifting transformer the solution provides durability and reliability at a low cost.

    Under ideal grid conditions the solution eliminates the 5th, 7th, 17th and 19th harmonics and results in a THiD of around 12% at full load.

    The needed transformer makes this solution ideal for applications where stepping down from medium voltage is required or where isolation from the grid is needed.

    The Danfoss VLT 12-Pulse Drive provides harmonic reduction without adding capacitive or inductive components which often require network analysis to avoid potential system resonance problems.

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