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Megger TTR100 Hand-Held Transformer Turns Ratio Tester

Manufacturer part number: TTR100
The Megger TTR100 is an automatic handheld, battery operated transformer turns ratio test set used to measure the turns ratio, excitation current, phase displacement, dc resistance and polarity of windings in single- and three-phase distribution transformers (tested phase by phase), potential & current transformers, and tapped transformers.
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The Megger TTR100 is an automatic handheld, battery operated transformer turns ratio test set used to measure the turns ratio, excitation current, phase displacement, dc resistance and polarity of windings in single- and three-phase distribution transformers (tested phase by phase), potential & current transformers, and tapped transformers. Deviations in the mentioned measurements will quickly indicate problems in transformer windings or in the magnetic core circuits.

This unit measures the highest turns ratio in the industry with an accuracy of 0.1% or better and with the lowest excitation voltage. No other instrument’s performance is comparable that is commercially available today.

Features

  • Fully automatic; fast; easy-to-use; handheld; robust; lightweight
  • Battery powered with power-saving and shutdown function
  • Tests turns ratio, phase displacement, excitation current, winding resistance and polarity
  • Meets all IP54 requirements
  • RS232 for data transfer and printing
  • Stores 200 test results and 100 user-defined transformer test settings
  • Six user-selectable languages
  • Type of Power: Rechargeable NiMH battery pack, 3.6 V dc, 3800 mAh
  • Battery Life: 15 hours of field operation
  • Charger Input Voltage: 100-250 V ac, 50/ 60 Hz ±2 Hz Unit can be operated while charging. Charging time is approximately three hours
  • Excitation Voltage: 8 V rms for testing distribution or power transformers, and PTs; 1.5 V ac RMS, or 8 V ac RMS for testing CTs. The excitation voltage is switched automatically if excitation current exceeds a preset value.
  • 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: 8 Vac: 0.8 to 20,000, 5 digit resolution (for transformers and PT testing); 1.5 V ac: 5.0 to 2200, 5 digit resolution (for CT testing)
  • Phase Deviation Range: ±90º, 1 decimal point for the minutes display, 2 decimal points for the degree display, or for the centiradian display
  • Winding Resistance Range: 0 to 2000 Ω, 4 digit resolution
  • Transformer Vector Group: 1PH0 or 1PH6
  • Transformer Polarity: Additive or subtractive
  • Current (rms) Accuracy: ±(2% of reading + 1 digit)
  • Phase Deviation Accuracy: ±3 minutes
  • Measuring Time: 8 to 20 seconds for single-phase distribution transformer
  • PC/Printer Interface: RS232C port, 9-pin, 57.6 Kbaud (19.2 Kbaud for the printer)
  • Display Full Graphics: LCD module, wide temperature range, 128 x 64 dots (21 characters by 8 lines)
  • Test Result Storage: Internal, nonvolatile memory for storing up to 200 sets of single-phase measured and calculated ration, exciting current, phase, ratio error, winding resistance, polarity, vector group, plus header information (company, substation, transformer manufacturer, transformer rating, instrument serial number, temperature, relative humidity, and operator name). In addition, up to 100 user-defined transformer settings can be stored.
  • Operating Temperature: -4ºF to 131ºF (-20º C to 55ºC)
  • Storage Temperature: -58ºF to 140ºF (-50º C to 60ºC)
  • Operating Relative Humidity: 0 to 90% noncondensing
  • Storage Relative Humidity: 0 to 95% noncondensing
  • Dimensions: 9.5 H x 4.5 W x 1.875 D in. (241 H x 115 W x 48 D mm)
  • Weight: Approx. 3.3 lbs (1.5 kg), instrument only, without leads
Description

The Megger TTR100 is an automatic handheld, battery operated transformer turns ratio test set used to measure the turns ratio, excitation current, phase displacement, dc resistance and polarity of windings in single- and three-phase distribution transformers (tested phase by phase), potential & current transformers, and tapped transformers. Deviations in the mentioned measurements will quickly indicate problems in transformer windings or in the magnetic core circuits.

This unit measures the highest turns ratio in the industry with an accuracy of 0.1% or better and with the lowest excitation voltage. No other instrument’s performance is comparable that is commercially available today.

Features

  • Fully automatic; fast; easy-to-use; handheld; robust; lightweight
  • Battery powered with power-saving and shutdown function
  • Tests turns ratio, phase displacement, excitation current, winding resistance and polarity
  • Meets all IP54 requirements
  • RS232 for data transfer and printing
  • Stores 200 test results and 100 user-defined transformer test settings
  • Six user-selectable languages