TTRU3 - Basic Model

Megger TTRU3-Basic - 3 Phase Transformer Turns Ratiometer

Megger’s TTRU3 transformer turns ratio tester is a revolutionary instrument designed to perform three-phase turns ratio measurements using step-up excitation (patented). 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 seen 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.

What’s more, the TTRU3 can be connected to a computer, enabling you to download results or control the instrument remotely. There is also an optional 2-inch printer for the instrument, enabling you to have 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 touch screen display. To generate reports, results can be downloaded in Excel, and PDF files can be saved to a USB drive.

Key Features

• ***Leads sold separately. See lead selection section below.***
• Step-up ratio testing
• Step-down ratio testing
• Confirmation of expected nameplate vector configuration
• Ability to measure actual vs expected phase shift
• Unique kelvin clamps with adjustable 3-inch jaw (sold separately)
• Banana plug input for connection to terminal blocks
• Turns ratio % error vs nameplate with pass/fail
• Test voltage up to 250 V
• Automates an OLTC test sequence with one touch

The Megger TTRU3 - Basic Model # TTRU3-BASIC is manufactured by Megger. Valley Instrument Service is an authorized Megger dealer offering full sales support, NIST-traceable calibration, and expert technical assistance.