Three-Phase Transformer Turns Ratio Tester

TURA-03; Device for measuring the transformation ratio in three-phase transformers, with integrated battery and printer / Ratio meter


  • Ratio Measurement 0.8 to 50,000
  • Test Voltages 1 V to 250 V
  • High Accuracy 0.08%
  • Built-in Printer

TURA-03 are designed using advanced engineering technology to measure the turns ratio of single-phase and three-phase transformers.

TURA-03 have easy, fast and accurate turns ratio measurement features for current, voltage and power transformers using our user-friendly software.

By using ANSI/IEEE C57.12.90 measurement method, TURA-03 can produce precise results. TURA-03 are one of the most accurate devices with its wide range (0.8 to 50,000) ratio measurement capability and high precision (0.08 %).

Besides the ratio measurement, TURA-03 can also measure excitation current, phase angle, polarity, ratio error and magnetic balance.

Even though TURA-03 have a three-phase cable configuration, operators can also make single-phase transformer tests as well.

TURA-03 can detect vector groups automatically.

TURA-03 have a wide operation range from high excitation value current transformers to high powered power transformers at substations with 1V, 4V, 10V, 40V, 100V and 250V AC test voltages generation capability.

A 7-inch TFT touch display allows TURA-03 to show all measurement results on a single screen.

USB, Bluetooth (Option) and Flash Memory features allow TURA-03 Series to control, record and store measurement results (up to 100 Test Records).

With the Data Management Platform (DMP Software), operators can control TURA-03 and analyse measurement results.

Operators can easily print the measurement results with the 2.28-inch built-in Printer of TURA-03.

Multi-language capability and user-friendly operation menu make it easy to control TURA-03, even by less experienced staff.

TURA-03 can control tap changers (raise and lower) via its tap changer outputs.

TURA-03 devices are light, compact and rugged with the protection class IP67 (case closed).

In addition to ratio tests, TURA-03 can perform Magnetic Balance Tests as well.


  • Turns Ratio Measurement (Single-phase and three-phase measurement)
  • Ranges from 0.8 to 50,000 ratio measurement
  • High Accuracy (0.08 %)
  • 1V, 4V, 10V, 40V, 100V and 250V AC test voltages
  • Ratio Error Measurement
  • Excitation Current, Phase Angle, Polarity Measurement, Magnetic Balance
  • Built-in Printer
  • Automatic vector group detection feature
  • Internal memory, USB Flash Drive
  • PC control via USB cable
  • Optional Bluetooth control and communication
  • 7-inch TFT touch display

Ordering Information

TURA-03; Three-Phase Transformer Turns Ratio Tester with Built-in Printer

TURA-03 BLUE; Three-Phase Transformer Turns Ratio Tester with Built-in Bluetooth & Printer

TURA-03B; Three-Phase Transformer Turns Ratio Tester with Built-in Battery & Printer

TURA-03B BLUE; Three-Phase Transformer Turns Ratio Tester with Built-in Battery, Bluetooth & Printer

Measurement Parameters

Turns Ratio Measurement, Excitation Current, Phase Angle, Polarity, Ratio Error (%), Vector group detection, Magnetic Balance

Ratio Measurement Modes

CT Mode, PT Mode (Single-Phase and Three-Phase)

Measurement Method

ANSI / IEEE C57.12

Test Voltages

CT Mode: 1 V e 4 V

PT Mode: 1, 4, 10, 40, 100, 250 V

Ratio Range

0,8 - 50000






CT Mode (1 V - 4 V)

0,80 - 399




400 - 4000

0,1 % 


PT Mode (10 V - 250 V)

0,80 - 5000




5000 - 12000




12001 - 50000


Phase Angle Measurement

0 - 360 Degrees

Excitation Current

2 A





Fino a 1 mA

0,2 μA

0,25% rdg ± 500 μA

Da 1 mA a 10 mA

1 μA

0,25% rdg ± 500 μA

Da 10 mA a 100 mA

10 μA

0,25% rdg ± 500 μA

Da 100 mA a 2000 mA

100 μA

0,25% rdg ± 500 μA

Power Supply

100 - 240 V AC 47/63 Hz


Sì, 14,4 V 3,6 Ah Optional (Models: TURA-03B, TURA-03B BLUE)


Up to 100 records (include up to 25 tap results)


2.28-inch Printer


USB 2.0/1.1 Standard-A, USB 2.0/1.1 Standard-B, Bluetooth (factory install option)

PC Software

DMP Software


7-inch Colour Touch Display


424 mm x 340 mm x 173 mm


7.1 kg

Operating Temperature

-10 °C ... +60 °C

Protection Class

IP67 (closed housing)

Set of Package

TURA-03, Power Cable, Ground Cable, 5 m (16.4 ft.) Standard Test Cable Set, 10 m (33 ft.) Extension Cable Set, Tap Changer Cable Set, USB Cable, Printer Paper (x2), USB flash drive, Instruction Manual (Soft Copy), DMP Software, Cable Bag


Hard Carrying Case, Bluetooth (factory install option), Battery

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For any information you can contact us by phone or e-mail:
+39 0471 1800338 -

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