Tettex TTR 2796 Three Phase Transformer Turns Ratio Meter

• Fully automated measurement of turns ratio, voltage ratio, phase displacement, and excitation current.
• Better transformer excitation due to higher test voltage of 250V.
• Highest accuracy on the market - up to 0,03%.
• Ratios of up to 50’000 can be measured
• Measurement of phase displacement of transformers with irregular vector groups like: phase shifting, rectifier, arc-furnace and traction transformers.
• Automatic Winding Connection Identification (AWCI) and automatic vector group detection supports quick and easy operation.
• Quick setup with intuitive guide-through user interface. Test setups and results can be stored and recalled, printed out with the built-in printer or used for later analysis.
• Lightweight, rugged and compact design allows use in harsh environment (field proof). Closed case is IP65 waterproof, open case is splash proof.
• Safety connection control feature proofs test setup before applying regular test voltage to guarantee safety of the personnel and instrument.
• Free external application software allows data exchange and advanced analysis of results on a computer (USB connection) including automatic report generation.
• Remote tap changer switch enables convenient testing of multi-tap transformers.

General
Excitation voltage	2.5 V, 25 V, 100 V and 250 V; automatic or manual selectable
Excitation current	max. 1 A
Display	5.2” dot matrix LCD 240x128 module with backlight
Memory	Stores up to 100 complete test results / test setups
Printer	Thermal strip printer, paper width 58mm
Interfaces
Computer:	USB 2.0 client (with supplied adapter)
Tap changer:	3 pole contact in/out (potential free)
Operating temperature	- 10°C* … 55°C * - 10°C typical, - 5°C guaranteed
Storage temperature	- 20°C … 70°C
Humidity	5 .. 95 % r.h. non-condensing
Mains	95 … 240 V AC, 50/60 Hz, max. 1.3 A
Dimension (L x W x D)	41 cm x 31 cm x 17 cm (16” x 12.2” x 7”)
Weight	8.8 kg (19 lbs) excl. cables

Turns ratio, voltage ratio, phase displacement and excitation current measurements according to ANSI, IEC and Australian standards on:

• Power Transformers
• Distribution Transformers
• Special transformers
  • Phase shifting transformers
  • Rectifier Transformers
  • Arc-furnace Transformers
  • Traction Transformers.
• Instrument Transformers

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