Transformer Turns Ratio Testers
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Vanguard Instruments Company Inc. manufacturers three micro-processor based automatic transformer turns ratio testers:
a line operated single-phase tester - Model ATRT-01
a battery/line operated single-phase tester - Model ATRT-01B
a line-operated three-phase tester - Model ATRT-03
All units:
measure ratio from 0.800 to 2000.00
display ratio on backlit LCD display require no calibration
incorporate RS-232C interface for connection to computer
are provided with software for data storage and report generation
Additional features of the 3-Phase Tester - Model ATRT-03:
Runs tests without need to change test hookup cables
Measures and displays excitation current
Measures and displays winding phase angle
Built-in printer provides immediate hard copy of results
Automatically calculates & prints out % error of each test
Stores a full transformer's test result for printing or uploading to PC