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                                                                                   | Arbiter Systems | Synchronized Power Measurements | 936A


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  Model 936A Portable Reference Current Transformer

The Arbiter Systems Inc. Model 936A Reference Current Transformer provides laboratory grade accuracy in a small portable ruggedized case, making it ideal for field use. Multiple ratios of 1200:5, 1000:5, 800:5, and 600:5 are selectable via a front panel switch. The guaranteed accuracy over the full input range and operating conditions is 0.02% ratio and 0.01 phase (traceable to NIST), ideal for calibrating other current transformers.

The model 936A uses an active transformer to achieve the high accuracy needed for a primary reference. This design incorporates a dual toroid with an amplifier aided second stage. The active circuitry reduces the sense transformer core flux to zero and produces an accurate output current independent of burden.



  • Portable and rugged for field work.
  • Supports multiple ratios of 1200:5,
    1000:5, 800:5,
    and 600:5.
  • Guaranteed accurate - within 0.02% ratio and  0.01 phase, traceable to NIST.
  • Works with Model 935A and 931A.
  The Model 936A was designed primarily for use with the Model 935A Current Source and the Model 931A Power System Analyzer to calibrate current transformers used with the Model 1133A Power Sentinel. The Model 936A's multiple ratio selections allow other current transformers to be tested and calibrated across their entire operating range

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