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Hand-held Transformer Tester – Megger TTR25-1

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Power Meter and Process Calibrator

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Rp.123

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DESCRIPTION
SPECIFICATION

The Megger TTR25-1 is an automatic hand-held battery operated transformer turns ratio test set. It is used to measure the turns ratio, excitation current and polarity of windings in single- and three-phase distribution and power transformers (tested phase by phase), potential & current transformers, and tapped transformers. The unique design of the TTR25-1allows the user to operate the test set while holding it in one hand. It effectively eliminates the user from having to kneel or bend down to operate the instrument and speeds up testing time. Realizing the extreme environments in which the TTR25-1must operate, special attention has been paid to making it extra rugged, with a high impact, shock resistant case, yet incredibly lightweight at a mere 870 g (1.9 lbs).

Excitation Voltage : 8 V rms for testing distribution or power transformers and PTs; 0.5, 1.5, or 8 V ac rms for testing CTs
Test Frequency : 55 Hz internally generated providing a universal 50/60 Hz test set
Excitation Current Range : 0 to 100 mA, 4-digit resolution
Turns Ratio Range : 0.8 to 20,000, 5 digit resolution
Current (rms) Accuracy : 5% rdg ±0.5 mA
Turns Ratio Accuracy* :
0.20% (0.8 to 4,000)
0.25% (4,001 to 10,000)
0.30% (10,001 to 20,000)
*For Excitation Current Values no greater than preset value.
Temperature Range Operating : -20º C to 55º C (-5º F to 130º F) & Storage : -50º C to 60º C (-55º F to 140º F)
Relative Humidity Operating : 0 to 90% noncondensing & Storage : 0 to 95% noncondensing
Measuring Time : Less than 5 seconds
Measurement Method : ANSI/IEEE C57.12.90 and IEC 600076.1 (2000)
Dimensions : 240 H x 115 W x 50 D mm (9.5 H x 4.5 W x 1.9 D in.)
Weight : Approximately 1.3 kg (2.8 lb), including leads

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