Atec Megger-TTR100 - Manual

TTR ™ 100
Handheld TTR
■ Fully automatic; fast; easy-to-use;
handheld; robust; lightweight
■ Battery powered with power-saving and
shutdown function
■ Tests turns ratio, phase displacement,
excitation current, winding resistance
and polarity
■ Meets all IP54 requirements
■ RS232 for data transfer and printing
■ Stores 200 test results and 100 user-
defined transformer test settings
■ Six user-selectable languages
TTR™100
Handheld TTR
DESCRIPTION
The Megger TTR100 is an automatic handheld, battery
operated transformer turns ratio test set used to measure
the turns ratio, excitation current, phase displacement, dc
resistance and polarity of windings in single- and three-
phase distribution transformers (tested phase by phase),
potential & current transformers, and tapped transformers.
Deviations in the mentioned measurements will quickly
indicate problems in transformer windings or in the
magnetic core circuits.
The unique design of the TTR100 allows the user to
operate the test set while holding it in one hand. No other
transformer test set offers this capability. It effectively
eliminates the user from having the kneel or bend down
to operate the instrument and speeds up testing time.
Realizing the extreme environments in which the TTR100
must operate, special attention has been paid to making it
extra rugged, with a high impact, shock resistant case, yet
incredibly lightweight at 3.3 lb. (1.5 kg). It weights less
than any other commercially available instrument on the
market.
Its rugged and robust design makes this instrument well
suited for use in a variety of harsh environments. The
TTR100 is particularly suited for testing in substations and
transformer-manufacturing environments where testing
single and three-phase transformers can be performed.
The TTR100 provides reliable results, helping the user in
determining the condition of the transformer under test. It
features a high contrast LCD screen which can be seen in
bright or ambient light.
The TTR100 comes equipped with specially designed leads
which provide the necessary flexibility needed in all
weather conditions.
This unit measures the highest turns ratio in the industry
with an accuracy of 0.1% or better and with the lowest
excitation voltage. No other instrument’s performance is
comparable that is commercially available today. Another
excellent feature of this TTR is the ability to accurately
measure phase deviation (in minutes or centiradians) of
the transformer primary versus secondary. This
measurement is also useful in verifying phase errors in PTs
and CTs.
The TTR100 features special software capabilities. It comes
equipped with sufficient onboard memory to store up to
200 test results (including test report header information)
in the field for later retrieval, as well as 100 user-defined
transformer settings. Test results can be printed on an
optional serial printer whenever a hard copy is desired, or
the data can be downloaded to a PC. Identification of
individual test readings is also easily done. The system
software allows entry of the transformer alphanumeric
serial number, transformer type and tap information
(numerical, alphabetical, or alpha-numerical) for each test
performed.
The TTR100 comes with a Windows ® based software
program that permits download of test data from the
instrument to a PC database. Data stored in the database
can be retrieved at a later date and test reports can be
printed to assist in the preparation of management and/or
analysis reports. These reports are easily transmitted via
e-mail.