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.
Features
Stand-alone or remote-control operation
Accurately measures ratio, phase deviation and excitation current
Field upgradeable without compromise to calibration
Built-in capability for storing and downloading test results in an XML format, via RS-232, Ethernet or USB ports (depending on model)
Works in the presence of high interference/high voltage
Highest ratio measurement (45,000:1); highest accuracy (0.1%)
Displays % error vs. name plate with pass/fail limits
SPECIFICATIONS
Input Power: 120 V ac ±10%, single phase, 50 ±2 Hz or 60 ±2 Hz, 100 VA
Excitation Voltage: 8, 40, or 80 V rms, automatically or manually selected
Excitation Current Range and Accuracy: 0 to 500 mA, 3 digit resolution, ±(2% of reading + 1 digit)
Phase Deviation Range and Accuracy: ±90 degrees, 1 decimal point for the minutes display, 2 decimal points for the degree display, or for the centi-radian display Accuracy: ±3 minutes
Display: 8.4 in., full-color VGA with full QWERTY keyboard and navigational pushbuttons.
Test Result Storage: Internal, nonvolatile memory for storing up to 200 sets of three-phase measuered and calculated ratio, exciting current. phase, ratio error, plus serial number and transformer type
Measuring Time: 9 to 20 seconds depending on mode of operation and type of transformer
Operating Temperature: 23°F to 122°F (-5°C to 50°C)
Storage Temperature: -58°F to 140°F (-50°C to 60°C)
Relative Humidity: 0 to 90% noncondensing
Dimensions: 10.5 H x 17.5 W x 6.9 D in. (266.7 H x 444.5 W x 175.3 D mm)
Weight: Approx. 16.5 lbs (7.5 kg), instrument only, not including leads
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