Raytech USA, Inc.
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INTRODUCTION
The Raytech three phase voltage system option SM206 (T-Rex) is an optional system accessory
for 3-Phase transformer ratiometer test sets designed by Raytech (ie...TR-Spy, Mark II).
T-Rex was designed to allow Engineers and Test Technicians the ability to test the phase
relationships and actual voltage ratios of transformer windings while applying three phase
voltage.
The system can precisely measure the ratio and angular relationship of transformer phases with
voltage applied to all three phases simultaneously. This is a “real condition” measurement, which
allows greater understanding of how the transformer will operate connected to a 3 phase system.
The T-Rex is especially useful for transformers with:
Phase relationships other than 30
.
Zig Zag windings.
Uncentered neutral points.
Suspected broken, damaged, or missing core laminations.
The T-Rex is contained within a separate yellow case and comes complete to connect to the
Raytech TR-Spy or Mark II, three phase transformer ratiometer.
The system: The T-Rex is a completely new approach in technology. Raytech, an innovative
research and development company, has developed a system for three phase measurements in a
single lightweight package. There are no other systems available to the engineer that allows such
quick and accurate measurements. The system is precision built and extremely accurate.
Ease of use: The T-Rex is an intelligent system option that communicates with the TR-Spy or
Mark II during three phase voltage measurements. No additional programming is required.
The system and option can operate a full 3 phase testing sequence with a single push button operation.
Connect the leads, Select the transformer configuration and vector phasing, Press GO to initiate the
test.
Unique Measuring Technique: This newly designed option incorporates high precision
circuitry for phase resolution measurements. The design utilizes a precision crystal controlled
frequency generator for precise phase measurements.
Operation: The T-Rex applies a preset, three phase voltage on the HIGH windings 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 of the TR-Spy or Mark II.
Compact Design: The T-Rex is a lightweight option that comes complete with its own rugged
waterproof Fieldcase.
Simple Maintenance: 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.
