Megger’s TTRU3 transformer turns ratio tester is 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 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.
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 |
| Guaranteed accuracy ±0.05% from -20°C to +50°C |
| 3Ø test voltage - up to 250V |
| 3Ø step up ratio (patented) |
| Phase shifting & zig-zag transformers tested easily and accurately |
| Fast 3Ø tests - less than 10 seconds |
| Confirm expected nameplate vector configuration |
| Ability to measure actual vs expected phase shift |
| Turns ratio % error vs nameplate with pass/fail |
| PC interface via USB for remote control operation and downloading of test results |
| SPECIFICATIONS |
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| Model: TTRU3 Series Overview |
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| Model | TTRU3ADV | TTRU3PRO | TTRU3EXP |
| Max Turns Ratio | 50,000 Down / 100 Up | 50,000 Down / 200 Up | 50,000 Down / 200 Up |
| Max Induced Voltage | 125V | 250V | 250V |
| Printer | Optional | Optional | ● |
| Power DB Control | Optional | Optional | ● |
| Safety Beacon 18 m (60 ft) | Optional | Optional | ● |
| OLTC Tap Changer Cable Adapters | Optional | Optional | ● |
| Power DB Control | Optional | Optional | ● |
| One Touch OLTC | Optional | Optional | ● |
| Custom App Control | Optional | Optional | ● |
| Ø Shifting TX’s Measurement | Optional | Optional | ● |
| Magnetic Balance | Optional | Optional | ● |
