Measurement, Control & Protection for 

Electro-Processes and High Power Conversion

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Integrated rectifier measurement and protection

Knowing different power conversion applications have different performance requirements, DynAmp realized that a new class of measurement was needed. The product had to be dependable, responsive, and provide metering-class accuracy with additional functionality tailored specifically for high-power conversion applications. To achieve this, DynAmp worked with leading rectifier manufacturers from initial concept through final design verification.

DynAmp's LKAT products provide measurement for both rectifier control and protection in a single system. LKAT offers an exceptional and un-matched price/performance balance as compared to any alternative measurement technology.

By measuring the actual DC output of the rectifier, the control loop is dramatically shortened for superior responsiveness as compared to other, more ‘remote’ measurement points such as ACCT measurement on the primary side or ‘measurement’ windings within the rectifier transformer. Using the actual DC output of the rectifier as the control input eliminates the effects of changes in rectifier / transformer efficiency, dynamics between multiple transformer secondaries and phase un-balance on the control of the rectifier.

While our LKCO and LKP systems provide the highest degree of accuracy, LKAT systems offer very good 'metering' levels of accuracy with a higher degree of functionality and installation flexibility, all at a significantly lower cost.

LKAT plus offers 0.75% Basic Measurement Accuracy

Now available in 2 accuracy versions, ideal for measurements < 100kA

  • New LKAT2 provides 0.25% basic accuracy : +/-50amps@20kA +/-250amps@100kA
  • LKATplus provides 0.75% basic accuracy : +/-150amps@20kA +/-750amps@100kA

    Extremely compact design for mounting versatility
  • Tight fit to bus locates head in maximum magnetic field minimizing external influences
  • Truly bi-directional performance means accurate operation even in reversed fields or when measuring AC current.

    Standard "Accuracy Diagnostics" monitors operation to ensure measurement confidence
  • Provides indication of correct measurement for control decision making
  • Local indication via LED as well as output for control systems.
      Easy to accommodate output signals
    • mA output signal is ideal for control systems and can successfully be wired through electrically noisy environments.
        Standard Reverse Current Protection
      • User configurable relay/alarm typically used for reverse current or over current protection

        Optional Protection Extensions (PE)
      • Second broad-range, independently scaled output signal for intelligent rectifier control & protection
      • Two additional user configurable relay/alarm outputs. Provides a total of three 'trip' points to be set.

      • DynAmp, LLC
        3735 Gantz Road
        Grove City, OH, 43123, USA
        Tel: (+1) 614-871-6900
        Fax: (+1) 614-871-6910


        Copyright 2020 DynAmp, LLC
        All Rights Reserved
        ( formerly Halmar and LEM DynAmp )
        To visit LEM Group, click here
        Updated: March 2020