The 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, and tapped transformers.
The 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, and tapped transformers.
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The unique design of the TTR25-1 allows 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 TTR25-1 must operate, special attention has been paid to making it extra rugged, with a high impact, shock resistant case, yet incredibly lightweight at a mere 1.9 lb (870 g).
Caractéristiques
Applications
The proper operation of a transformer relies almost entirely on the electrical properties of its windings. The ensure continued proper operation, transformers are tested to verify that their electrical properties have not changed from design specifications. A TTR is an extremely useful instrument for testing transformer windings because it can help locate several types of problems within single and three-phase transformers. This type of TTR is best suited for power transformers up to 1 MVA.
| Power Source | 6 x AA alkaline batteries |
| Battery Life | Up to 12 hours of field operation |
| 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 |
| Transformer Polarity | Normal or reversed |
| Current (rms) Accuracy | 5% rdg ±0.5 mA |
| Display Full Graphics | LCD module, adjustable back-lighting, wide temperature range, 128 x 64 dots (21 characters by 8 lines) |
| Safety/EMC/Vibration | Meets the requirements of IEC-61010, CE and ASTM D999.75 |
| Temperature Range | -5 to 130°F (-20 to 55°C) |
| Measuring Time | Less than 5 seconds |
| Dimensions | 9.5 x 4.5 x 1.9" (240 x 115 x 50 mm) |
| Weight | Approximately 2.8 lb (1.3 kg), including leads |
| Power Source | 6 x AA alkaline batteries |
| Battery Life | Up to 12 hours of field operation |
| 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 |
| Transformer Polarity | Normal or reversed |
| Current (rms) Accuracy | 5% rdg ±0.5 mA |
| Display Full Graphics | LCD module, adjustable back-lighting, wide temperature range, 128 x 64 dots (21 characters by 8 lines) |
| Safety/EMC/Vibration | Meets the requirements of IEC-61010, CE and ASTM D999.75 |
| Temperature Range | -5 to 130°F (-20 to 55°C) |
| Measuring Time | Less than 5 seconds |
| Dimensions | 9.5 x 4.5 x 1.9" (240 x 115 x 50 mm) |
| Weight | Approximately 2.8 lb (1.3 kg), including leads |
