Macey's Electrical - Serving Electrical Utilities - A Network of Quality Equipment

Arbiter Systems Inc.


Home | Arbiter-Systems | Synchronized Power Measurements | Model 936A Reference Current Transformer


Arbiter Systems Logo

Model 936A 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.

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.

Model 936A Reference Current Transformer



  • 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.


Input Range

1A to 1200A rms

Current Ratios

1200:5, 1000:5, 800:5, and 600:5.

Output Current

5A rms maximum

Output Voltage

8.5V rms maximum


Environmental / Safety

Operating Temperature

0C to 40C

Storage Temperature

-40C to 85C




Designed to meet UL, CSA, VDE Standards


General Specifications

External Power

85V to 264V AC, 47Hz to 440Hz, 15VA max.
110V to 250V DC, 15W max.


IEC-320 with fuse and mating cord-set

Dimensions (sense transformer)

55mm ID nominal

Dimensions 936A

205mm x 305mm x 225mm




Ordering Information

Arbiter Systems 936A

Reference Current Transformer includes Operating Manual and power cord.


Our Partners



Home | Products | Search | Site Map |


Macey's Electrical Pty. Ltd.
ABN 17 344 601 468
Unit 1, 49 Gavenlock Road, Tuggerah, NSW Australia 2259
Phone: +61 2 4353 4644    Mobile: 0412 678 925