Atec Megger-TTR300 Series - Manual

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
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);
highest accuracy (0.1%)
n Displays % error vs. name plate with pass/fail
limits
TTR ® 300 Series
Three-Phase Transformer Turns Ratio Test Sets
TTR330 shown
TTR300 — remote controlled “black box” unit