Megger TTRU3-EXP/PRO/ADV True 3 Phase Transformer Turns Ratiometer - 3Ø 125 or 250V
The Megger TTRU3 transformer turns ratio tester is a revolutionary instrument designed to perform three-phase turns ratio measurements using step-up excitation. A single three-phase lead-set connection is all that is required to complete three-phase tests in less than 10 seconds!
The TTRU3 is capable of three-phase excitation and can induce up to 250 V on the primary winding, overcoming the voltage dependence on larger transformers. The three-phase source also allows you to test phase shifting and zigzag transformers and provides you with a guaranteed accuracy of ±0.05 % from -20 °C to +50 °C.
Download results or control the instrument remotely by connecting the TTRU3 to a computer. There is also an optional 2-inch printer for the instrument, giving you a hard copy of your results if required.
You can also configure test plans and store results directly on the TTRU3 using the built-in 7-inch (18 cm) daylight-viewable touchscreen display. Results can be downloaded in Excel to generate reports, and PDF files can be saved to a USB drive.
Truly Simple
The TTRU3 is an important tool for determining the mechanical condition of transformers. It is so simple to use that only a quick guide is enough to begin testing. All ratio tests are performed with one 3Ø lead set connection.
Vivid Touchscreen
With the latest 7-inch touchscreen display, it's easy to see and operate in dark and sunny conditions, and temperatures down to -20 C. The display uses large icons, simplifying the transformer testing process.
Accurate and Fast
The most impressive part is the accuracy, its 3Ø test gives results that you can trust, and at under 10 seconds per test, you'll have more time in your busy day.
Key Features
- Guaranteed accuracy ±0.05 % from -20 °C to +50 °C
- Phase shifting and zigzag transformers are tested easily and accurately
- Fast three-phase tests - less than 10 seconds
- 3Ø test voltage - up to 250V
- Banana plug input for connection to terminal blocks
- Confirm the expected nameplate vector configuration
- Ability to measure actual vs expected phase shift
- Unique kelvin clamps with an adjustable 3-inch jaw
- Turns ratio % error vs nameplate with pass/fail
- PC interface via USB for remote control operation and downloading of test results
What's Included?
- Transformer turns ratio tester
- AC Adapters & Power Cord - 2.5m (8ft)
- USB 2.0 Cable
- OLTC Tap Changer cable - 9m (30ft)
- Cable bag - backpack
- Ground Cable - 5m (16ft)
- Thumb Drive
- Triple Function Pen
Software Included with TTRU3 Expert
- All Automation SW
- PowerDB Control
- One Touch OLTC
- Custom App Control
- All Versatile SW
- Phase Shifting
- Magnetic Balance
Product Range
- Megger TTRU3-ADV TTRU3 Advanced, 3Ø 125V
- Megger TTRU3-EXP TTRU3 Expert, 3Ø 250V + All SW
- Megger TTRU3-PRO TTRU3 Professional, 3Ø 250V
Revolutionary Design
The TTRU3 uses patent-pending 3Ø step-up turns ratio testing to perform a complete series of measurements on a transformer.
Confidence While Testing
The TTRU3 can confirm the expected nameplate vector configuration.
Versatile Measuring Ability
With a true 3Ø source, zig-zag and phase-shifting transformers can be tested quickly and accurately.
High-Quality Clamps
The TTRU3 leads come with industry-defining kelvin clamps with adjustable 3-inch jaw and banana plug inputs, making connections to transformers or terminal blocks easy and safe.
Datasheets
| Input Power | 90-264VAC, 47-63Hz, 250VA Max | |
|---|---|---|
| Output | Voltage | 3Ø, 1 - 48VAC, up to 250V on Primary |
| Frequency | 50-480Hz | |
| Current | 0.1mA - 1A, Max 2A @ 48V | |
| Turns Ratio Measurement Methods | 3Ø Step-Up, 3Ø Step-Down, 1Ø Step-Up, 1Ø Step-Down | |
| Turns Ratio Range and Accuracy Guaranteed accuracy from -20°C to +50°C |
Step-Down Excitation 25-48V | ±0.05% 0.8 - 1000 |
| ±0.10% 1001 - 2000 | ||
| ±0.30% 2001 - 15000 | ||
| ±1% 15001 - 50000 | ||
| Step-Down Excitation 1-24V | ±0.10% 0.8 - 1000 | |
| ±0.20% 1001 - 2000 | ||
| ±0.60% 2001 - 15000 | ||
| Step-Up Measurement 25-250V | ±0.05% 0.8 - 200 (most Power Tx) | |
| Step-Up Measurement 1-24V | ±0.10% 0.8 - 200 | |
| Excitation Current Measurement | Resolution | 0.1mA 0.1mA - 100mA, 1mA 101-2000mA |
| Accuracy | ± 1% ±0.1 mA | |
| Frequency Measurement | Resolution | 0.1 Hz |
| Accuracy | ±0.1% ±0.1 Hz | |
| Transformer Phase Measurement | Range | 0 - 360 Degrees |
| Accuracy | ± 0.05 Degrees | |
| Resolution | 0.01 Degrees | |
| Weight | 6.5kg / 14lbs | |
| Dimensions | 406 x 304 x 254mm / 16 x 12 x 8in | |
| Environmental | Operating | -20°C to +50°C (-4°F to +122°F) |
| Storage | -30°C to +70°C (-22°F to +158°F) | |
| Relative Humidity | 0-90%, non-condensing | |
| Regulatory | Safety | IEC 61010-1:2010 + AMD1:2016 |
| EMI/EMC | IEC 61326-1:2012 | |
| RoHS2 | EN50581 | |
| Vibration/Drop/Shock | MIL-STD-810G | |
| Touchscreen | 180mm (7 in.), 800 x 480 Resolution, 1100 NITS | |
| Transformer Testing Standards | IEEE C57.152-2013, IEC 60076-1:2011, AS/NZS 6076 1:2014, CIGRE 445 2011 | |
| Case | Rugged case with fold-out feet, canvas carrying bag for leads and accessories | |
| Internal/External Data Storage | Up to 2000 sets of 3-phase results internal storage, transferable via USB 2.0/3.0 thumb drive | |
| Communication/Control Software | 180mm (7in) built-in display running custom GUI, USB Interface for PC Control running custom GUI | |
| Printer Output | 51mm (2in) thermal printer, prints all measurement data displayed on GUI | |
| SKU | TTRU3-EXP/PRO/ADV |
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