Raytech T-REX User manual

RAYTECH USA, Inc.
118 S. 2nd Street
Perkasie, PA 18944 USA
Tel. 888 4 THE SPY
Tel. [phone]
Fax. [phone]
THREE PHASE VOLTAGE OPTION
Model: T-REX
Instruction Manual Ver. 2.3

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 2
RAYTECH USA, Inc.
118 S. 2nd Street
Perkasie, PA 18944
Tel. 1 888 4 THE SPY (484 3779)
Tel. [phone]
Fax. [phone]
TABLE OF CONTENTS
TABLE OF CONTENTS.................................................................................................... 2
SAFETY PRECAUTIONS!................................................................................................ 3
UNCRATING:.................................................................................................................... 4
INTRODUCTION............................................................................................................... 5
THEORY OF OPERATION............................................................................................... 6
Circuitry Design............................................................................................................... 6
Design Consideration ...................................................................................................... 6
SPECIFICATIONS............................................................................................................. 7
Measurement Parameters................................................................................................. 7
Temperature..................................................................................................................... 7
Cable Set.......................................................................................................................... 7
Features............................................................................................................................ 7
GETTING STARTED QUICKLY...................................................................................... 8
OPERATION...................................................................................................................... 9
WARRANTY ................................................................................................................... 11
Limitation of Warranty.................................................................................................. 11

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 3
SAFETY PRECAUTIONS!
The following safety precautions must be observed during all phases of operation, service, and
repair of this instrument. By purchasing this equipment the purchaser assumes all liability for the
operation and use of this equipment. The intended use of the instrument, its design and
manufacture, is to be conducted within the precautions or other specific warnings located within
this manual. Failure to comply with these precautions and other specific warnings violates safety
standards of design, manufacture, and intended use. Raytech USA, Inc. assumes no liability for
the operation and use of this equipment.
SAFE OPERATION
Only qualified knowledgeable persons should be permitted or attempt to operate this test
equipment. All test personnel should fully familiarize themselves with the correct application and
operation of this and all test equipment prior to operation. Persons directly and indirectly
engaged in the operation of this test equipment should keep clear of all high voltage apparatus
while conducting tests and measurements.
BEFORE APPLYING POWER
Do not vary the input power source voltage level (IE..Connected to a variable AC power source).
The T-Rex and TR-Spy or Mark II auto-sense the input power from the mains plus from 100 to
240 vac 50/60Hz. Varying the input voltage will cause the test voltage to vary and result in a
higher or lower test voltage than indicated.
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cabinet must be connected to a properly
grounded receptacle. The power cord supplied with the equipment must be connected an
electrical receptacle with an electrical ground (safety earth ground). Non grounded instruments
are dangerous and may cause instrument damage
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified service personnel. Do not replace components with
power cable connected. To avoid injuries, always disconnect power, discharge circuits, and
remove external voltage sources before touching components.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Because of the danger of introducing additional hazards, do not install substitute parts or perform
any unauthorized modification to the instrument. Return the instrument to a Raytech USA
service department for service to ensure proper operation and that safety features are maintained.
Instruments, which appear damaged or defective, should be made inoperative and secured against
unintended operation until they can be repaired by qualified service personnel.

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 4
UNCRATING:
Unpack the new T-Rex and check to see that you have the following items:
T- Rex Interface H & X Lead Power Manual Cable Bag
Cable Connection Cable
If any of the above items are missing or damaged contact your local representative or Raytech
USA, Inc. immediately.
RAYTECH Toll free service & support telephone: 1 888 4 THE SPY (484 3779)
* Note 1:
The T-Rex Fieldcase is a waterproof design that incorporates a pressure relief valve that should
be slightly open when encountering atmospheric changes; i.e... Airplane Travel, High altitudes,
etc... Close the valve when transporting the equipment in wet conditions.
* Note 2:
When the optional hard travel case (part number ST0 822) or the optional soft travel case (part
number MC845) is ordered with a new T-Rex, the cable bag depicted above is omitted from the
shipping box.

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 5
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.

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 6
THEORY OF OPERATION
Circuitry Design
The T-Rex system is designed to produce and generate three (3) perfect sine waves from DC
coupled 24 Volts. The incorporation of D/A converters with the proper amplification produces
an AC sine wave on three (3) output channels. These sine waves are produced with identical
amplitudes and are shifted in phase 120. The T-Rex is basically a smart artificial 3 phase
generator. This system is designed to handle loads with an impedance as low as 0.5 ohms.
All system measurements are conducted in the appropriate ratiometer connected to the T-Rex.
No measurements are conducted by the T-Rex. Standard ratiometer measurements can be made
directly through the T-Rex without any influence.
Design Consideration
The T-Rex system was designed to be used world wide with consideration to test engineers
utilizing various specifications. Nomenclature and operation of the T-Rex was decided upon with
that consideration.
The T-Rex system was designed to assist the engineer in making precise phase angle measurements.
The T-Rex measurements will indicate phase angles of 180.
The ratiometer, working in conjunction with the T-Rex, senses the phase rotation by 180.
The measured result indicates to the engineer that the phase relationship is in a clockwise or
counterclockwise direction. With this indication the engineer is able to adjust the vector grouping
(Phase displacement) number on the ratiometer to correspond to the closest relationship in 30
degree increments. This is done to allow for greater accuracy of the phase relationship
measurement.
For example:
Measurement of a transformer with a phase shift of 42.
Select and measure the transformer with a phase displacement (Vector Group) number “0”.
The system would measure and display a phase displacement of 42.
The engineer would then adjust the phase displacement (Vector Group) number selection from a
“0” to a”1”(“1” indicates a 30shift). The resultant reading from the Ratiometer and T-Rex
would then be 12.0and be a more accurate phase result.
Rotation convention and nomenclature:
The convention of positive (+) Rotation and negative (-) Rotation is predetermined by the
software and the customers nomenclature.
All TR-Spy and Mark II systems dispatched prior to May 2002 are sent with the following
convention: A Transformer with the following configuration D-Y 1 would have a (+) Positive 30º
result. And a transformer with a configuration of D-Y 11 would have a (-) Negative 30º result.
The reverse convention (D-Y 1 (-) negative 30º & D-Y 11 (+) 30º positive) can be achieved by
requesting a software change for the TR-Spy Mark II and/or TR-Spy from RaytechUSA;
Tel. [phone]. Please indicate serial number upon requesting.
All systems with firmware revision 2.23 and higher have the following selection included in the
software menu: Press “Setup” Select “TRex Phase angle” Select “is Positive” or “is Negative”

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 7
SPECIFICATIONS
MODEL: T-REX
SIZE: L: 18.5” (470 mm) W: 14.6” (371 mm) H: 7.5” (190 mm)
WEIGHT: 18.5 lbs. (4.8 kg)
INPUT POWER: 100 to 250 vac 50 / 60 Hz Autoranging
TEST VOLTAGE: Three Phase, Internally Selected
PANEL DISPLAY: Indication lamps
FRONT PANEL: Anodized aluminum
INTERFACE: 25 Pin connection to TR-Spy or Mark II / Centronics Parallel Printer
Measurement Parameters
PHASE ANGLE:180 Degrees ACCURACY:0.1 Degree
RESOLUTION:0.1 Degree
Temperature
Operating: - 10C to 60C Storage: - 40C to 70C
Cable Set
3 Phase cable extension set
Interconnect Power supply cord
Interconnect Signal/Printer Cable for TR-Spy, Mark II
Interconnect Signal/Printer Cable for TR-Mark III
AC Power cord
Manual
Cable bag
T-Rex shoulder strap
Features
Automatic measurements of Voltage Ratio and phase angle relationship
Single push button operation
Single hook up to the transformer
Heavy duty protection circuitry
5 Year standard warranty
* Specifications are subject to improvement at anytime.

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 8
GETTING STARTED QUICKLY
WARNINGS!
BEFORE OPERATING THIS OR ANY OTHER TEST EQUIPMENT READ ALL SAFETY
WARNINGS AND UNDERSTAND THEM FULLY.
DO NOT VARY INPUT VOLTAGE (MAINS) AFTER POWERING ON TEST SET.
The T-Rex and TR-Spy or Mark II auto-senses the input (mains) voltage from 100 TO 250 vac
50/60 Hz. The TR-Spy then “locks–in” the test voltage range. If the input voltage (mains) is
varied after the TR-Spy was powered on the actual test voltage may be higher or lower than
indicated and damage to the test set may result.
CONNECTION: 6 –0
Connection of the T-Rex to the TR-Spy, Mark II is straight forward and relatively easy.
1. Connect the two short Red leads from the H & X connectors located on the top, right side of
the T-Rex (marked “TO TURNS RATIO SPY”) to the H & X connectors on the TR-Spy or
Mark II.
2. Connect the 25 pin Interface cable from the connector located on the middle- right side of the
T-Rex (marked “TO TR SPY”) to the Printer port of the TR-Spy or Mark II.
3. Connect the Power Interface cable from the connector located on the bottom- right side of
the T-Rex (marked “POWER OUTPUT”) to the Power connector of the TR-Spy or Mark II.
4. Connect the multi-colored test lead cables that were supplied with the TR-Spy or Mark II to
the respective connectors, H & X, located on the top, left side of the T-Rex (marked “TO
TEST OBJECT”). The clip lead end would then be connected to the respective connections
on the transformer under test (Note: The long Red extension cables may be used, if required).
Basically, this connection is performed as if a standard ratio test was to be made.
5. Connect the power cord supplied with the TR-Spy or Mark II to the “POWER INPUT” of the
T-Rex. Plug the power cord into a grounded 100 –250 vac outlet.

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 9
OPERATION
After following the connection instructions previously listed, switch on the power to the TR-Spy
or Mark II and also on the T-Rex. (Power on sequence is not critical as the TR-Spy or Mark II
and the T-Rex communicate constantly). After a 2 second delay both systems should turn on.
The T-Rex should have all three phase lamps illuminated and the TR-Spy or Mark II should have
the display screen illuminated.
The first step in operation of the T-Rex is to ascertain the correct Vector phasing (Phase
displacement) of the transformer under test if unknown (See also “Test Result Notes”on the
next page). This can be accomplished by running a standard Ratio test on the transformer using
the TR-Spy or Mark II.
If the Phase displacement is known proceed to step 2.
1. Select the correct transformer configuration on the TR-Spy or Mark II then select “?” if the
Vector phasing is unknown. Run a standard ratio test (refer to the TR-Spy or Mark II
manual). The TR-Spy or Mark II will display the correct vector phasing at the completion of
the test.
2. Select the following screen on the TR-Spy or Mark II to initialize operation of the T-Rex:
T-Rex Operation screen
3. Enter the Phase displacement number or enter “0”.
Note 1: The Phase displacement (number 11 shown in the example) should be the same as
previously tested. The Phase displacement number can be changed if desired.
Note 2: By selecting the Phase displacement prior to testing, the actual phase result will be the
most accurate phase result obtainable. The displayed phase is then added or subtracted
from the vector setting. For example: Phase displacement of 1 is set and the instrument
shows 0.13º result. The actual phase displacement is 30.13º
4. Press “GO” then “ALL” on the TR-Spy or Mark II and the test sequence will check,
calibrate, and test each phase sequentially (A, B, C) while applying three phase voltage to the
transformer.
5. The Results of the voltage ratio and phase relationship will be displayed on the TR-Spy or
Mark II screen.
6. End of Test. It is now possible to print or store the test results.
(see the TR-Spy or Mark II manual)

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 10
Testing Notes:
1. Transformers may have a nameplate that lists phase displacements referred to zero
degrees. Select “0” as the phase displacement and test. Afterwards check the results against
the nameplate.
2. Greater accuracy of the actual phase displacement can be achieved by selecting a vector
grouping as close to the actual phase displacement as possible. For example: If the initial
vector grouping selected was “0”(0) and the resulting phase was 62then select vector
phasing “2” (2 x 30).
3. The Phase displacement result is the phase relationship between H1 and X1, H2 and X2, etc…

Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent 11
WARRANTY
RAYTECH USA, Inc. warrants to the original purchaser of any new T-Rex, 3 Phase voltage
option, that it will be free from defects in material and workmanship under normal use and
service for a period of 2 years from the original date of shipment. An additional 3 year extended
warranty is provided, at no cost to the end user, for the products covered under this warranty if
the products are returned on each calendar year from the original date of shipment, prepaid, to
Raytech USA, for system evaluation. Failure to do so will void the additional extended warranty.
The obligation of RAYTECH USA, Inc. under this warranty is limited, in its exclusive option, to
repair, replace, or issue credit for parts or materials which prove to be defective, and is subject to
purchaser's compliance with the RAYTECH USA, Inc. warranty claim procedure as set forth
within this manual.
This warranty covers only those parts and/or material deemed to be defective resulting from
manufacturer’s workmanship. The liability of RAYTECH USA, Inc. shall be limited to the
repair, replacement, or issuance of credit for parts deemed defective within the meaning of this
warranty. Costs for labor or other expenses that may have occurred incidental to the inspection,
repair, replacement, or issuance of credit for such parts and/or materials shall be the sole
responsibility of purchaser. This warranty shall not apply to any accessories, parts, or materials
not manufactured or supplied by RAYTECH USA, Inc.
Equipment must be returned prepaid with a Return Material Authorization (RMA) to:
RAYTECH USA, Inc. or RAYTECH GmbH
118 S. 2nd Street Oberebenstrasse 11
Perkasie, PA 18944 CH-5620 Bremgarten
USA Switzerland
Tel. [phone] Tel. + 41 56 640 0670
Fax. [phone] Fax. + 41 56 640 0674
www.RaytechUSA.com www.Raytech.ch
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper and unauthorized
modifications or misuse and abuse of the product, negligence, alteration, modification, faulty
installation by the customer, customer’s agents or employees. Attempted or actual dismantling,
disassembling, service or repair by any person, firm, or corporation not specifically authorized in
writing by RAYTECH USA, Inc.
Defects caused by or due to handling by carrier, or incurred during shipment, trans-shipment, or
other move.
Inadequate maintenance by the customer, second source supplied software or interfacing,
operation outside the environmental limits, or improper site preparation.
Exclusive remedies provided herein are the customer’s sole and exclusive remedies.
RAYTECH USA, Inc. shall not be liable for any damages resulting from the use of this
equipment whether direct, indirect, special, incidental, or consequential damages, or whether
based on contract, tort, or any other legal theory.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED.