Atec TTR300 User Manual

TTR®300 Series

Three-Phase Transformer Turns Ratio Test Sets

TTR®300 Series

3-Phase Transformer Turns Ratio Test Sets

n

Stand-alone or remote-control operation

n

Accurately measures ratio, phase deviation

and exciting current

n

Field upgradeable without compromise to

calibration

n

Built-in capability for storing and downloading

test results in an XML format, via RS-232,

Ethernet or USB ports (depending on model)

n

Works in the presence of high interference/

high voltage

n

Highest ratio measurement (45,000:1);

TTR330 shown

highest accuracy (0.1%)

n

Displays % error vs. name plate with pass/fail

limits

DESCRIPTION

The TTR300 Series of three-phase transformer turns ratio
test sets are designed to measure the turns ratio of power,
instrument, and distribution transformers in a substation or
manufacturing environment. A rugged and robust design
makes these instruments well suited for use in a variety of
harsh environments. Our leads are specially designed to
provide the necessary flexibility needed in cold weather.

The TTR300 Series are ideal for use by power transformer
manufacturers. Their unique testing procedures and storage
capability allows an operator to set up and test difficult
three-phase transformers (with multiple tap changers and
bushing CTs) in a fraction of the time than it used to take
with other TTRs. This test also includes a pass/fail limit of
individual ratios.

The TTR300 Series also measure the phase deviation of
the transformer primary versus secondary. This quickly
indicates problems in the transformer such as partial
shorted turns and core faults. This measurement is also
useful in verifying phase errors in all types of PTs and CTs.

Each unit comes equipped with a remote-control switch
for single person testing. This allows the operator to test
transformers with LTCs very quickly.

The Series consists of four instruments:

TTR300

The TTR300 is designed to be completely remote
controlled via a PC running PowerDB LITE (included)
or PowerDB (full version) PC software applications. The
TTR300 is field upgradeable to the TTR310, TTR320 or
TTR330.

Some of the features of the TTR300 are:

n Field upgradeable to a model TTR310, TTR320 or TTR330

without compromise to calibration

n Built-in capability for storing test results into internal

memory in an open XML data format via PowerDB LITE

n Quickly download test results via RS-232 serial port

TTR300 — remote controlled “black box” unit

TTR310 — text-based LCD interface unit

TTR310

This unit features an easy-to-read, high-contrast LCD
which can be seen in bright sunlight and provides the
user interface for instrument set-up and test operation.
The unit comes complete with the software application,
PowerDB LITE.

The TTR310 has the ability to store test results, upload
results to a PC (via RS232 serial port), and/or print them
in the field via optional thermal paper printer, without the
use of an external computer.

Some of the features of the TTR310 consist of:

n Fully automatic operation (either stand-alone or

remote-control)

n Field upgradeable to a TTR330 or TTR320 without

compromise to calibration

n Built-in RS-232 port and optional thermal spool-paper

printer allows for printing of test results, while in the
field, and without the use of an external computer

n Built-in capability for storing test results into internal

memory in an open data format for direct input into

®

Excel

or XML format via PowerDB LITE

TTR®300 Series

Three-Phase Transformer Turns Ratio Test Sets

TTR320

The TTR320 features a high contrast bright 5.7” full VGA
color display that can be seen in direct sunlight. The
instrument employs a full QWERTY keyboard for entering
nameplate-type information. Communications ports are
provided in the form of RS-232, USB and Ethernet ports for
easy on-board printing, storage, and downloading of test
results.

Also, with a simple interface to PowerDB LITE PC software
application (included), the user can perform data analysis
and trending of results.

The TTR320 includes the following features:

n Fully automatic operation (stand-alone or remote-

control)

n Field upgradeable to a model TTR330 without compromise

to calibration

n Graphical User Interface allows for automated setup and

control through easy-to-read ICON based screens

n Built-in capability for storing test results, in an open XML

format, to either internal memory or to an external USB
storage device

n Built-in RS-232 port and optional thermal spool-paper

printer allows for printing of test results, while in the field,
and without the use of an external computer

n 5.7” VGA bright color display

TTR330 shown testing a pad mount three-phase transformer

TTR320 — graphical ICON based user interface unit

TTR330

The TTR330 offers a new user interface which allows
the operator to interact with the PowerDB ONBOARD
software system via full QWERTY and navigation keypads
as displayed on an 8.4” VGA bright-color screen. One of
the primary benefits of this interface is that it displays the
actual test form on the screen. An advanced feature of the
TTR330 allows the user to customize these test forms via
optional full-version PowerDB.

Other primary features of the TTR330 include three
communications ports (two USB, one Ethernet). The USB
“host” ports can be used for connecting directly to an
optional printer (to print full size 8.5” x 11” completed test
forms) and for data storage to a USB memory device (for
later printing, analysis, archiving, and/or trending). The
Ethernet port allows the TTR330 to interface (on a bi­directional basis) directly to a PC.