Raytech USA, Inc. All rights reserved
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INTRODUCTION
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Raytech Single Phase Transformer Turns Ratio (TR-1 & TR-1P) was designed to be a rugged and reliable
automatic transformer Ratiometer. This system has a high degree of accuracy and will test ratios to 4000:1. The
design of this test system is based upon the popular Raytech Automatic Three Phase test set: TR-Spy.
The TR-1 & TR-1P are a completely new approach in technology. Raytech is an innovative, research and
development company. Many hours of research and development enhance the reliability and precision of this test
set. To set this instrument apart from the standard test sets on the market we have added a graphical display and a
sensing circuit that can indicate when a transformer is connected to the test leads automatically.
The TR-1 & TR-1P are high precision, fully automatic, microprocessor based, Single Phase Transformer Turns
Ratio Test systems. This system is designed for highly accurate readings on-site with laboratory precision.
The TR-1 & TR-1P applies a preset test voltage on the HIGH winding side of the transformer and measures back
through the LOW side of the transformer. The results are reported on the easy to read liquid crystal display.
The TR-1 & TR-1P are lightweight systems that come complete in rugged waterproof field cases.
There is No maintenance required. There is No calibration procedure (No potentiometers to turn). This is due to the
utilization of high precision components in the design.
Advanced Protection: Upon powering on the system initializes itself with a self-calibrating, circuit checking
sequence. If any problems are detected during this initialization period, or during operation, the operator is
immediately notified. The system constantly monitors the condition of the transformer under test. The TR-1 &
TR-1P can even recognize shorted leads and will terminate the test without any damage to the test equipment. This
works especially well when test leads accidentally fall free from the transformer while under full voltage
measurement. This, incidentally, is one of the many reasons why we can extend our warranty to 5 years.
