The TTR3XX Series of three-phase transformer turns ratio test sets is 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.
| Backlight | LED |
| Computer Interface | Ethernet |
| Dimensions | Instrument: 8.5 H x 21.5 W x 13 D in. (216 H x 546.1 W x 330.2 D mm) |
| Display Size | 300 mm (12 in.) |
| Excitation Current Range and Accuracy | 0 to 500 mA, 3 digit resolution, +-(2% of reading + 1 digit) |
| Excitation Voltage | 8, 40, or 80 V rms, automatically or manually selected |
| Input Power | 120V, +-10% 60Hz, +-2 Hz, 100 VA |
| Internal Data Storage | up to 100,000 data sets |
| Luminance | 1600 nits |
| Measurement Method | ANSI/IEEE C57.12.90 |
| Memory | 32 Gigabits (SSD) |
| Operating Temperature | 23 Degree F to 122 Degree F (-5 Degree Celsius to 50 Degree Celsius) |
| Storage Temperature | -22 Degree F to 158 Degree F (-30 Degree Celsius to 70 Degree Celsius) |
| Technology | 4-wire resistive touchscreen |
| Relative Humidity | 0 to 90% noncondensing |
| Accuracy | +-3 minutes ( +-0.05 degrees) |
| Resolution | 1024 x 768 (VXA) |
| Display Type | Touchscreen display (ruggedized for field use) |
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