Description
Megger TTR310 Transformer Turns Ratio Tester Repair
The Megger TTR310 is a three-phase transformer turns ratio (TTR) tester — it measures the turns ratio, excitation current, and phase displacement of power and distribution transformers to verify windings and detect faults during commissioning and maintenance. As a precision ratio-measurement instrument with a test source, its faults concentrate in the source, the ratio-measurement circuitry, and the test-lead connections.
June Company repairs and calibrates the Megger TTR310 for transformer-maintenance and utility crews.
Common Megger TTR310 problems we fix
- Ratio-measurement recalibration — turns-ratio readings out of spec, recalibrated against standards so results are trustworthy.
- Excitation-current / phase faults — the excitation or phase-displacement measurement off, repaired.
- Test-source faults — the applied test signal not generating correctly, repaired.
- Test-lead / connection faults — the measurement connections, serviced.
- Display, control, or interface faults.
FAQs
My TTR310 ratio readings look wrong — fixable? Yes. Ratio-measurement and source faults are repairable and recalibrated, then verified so turns-ratio and phase results are accurate, with a NIST-traceable certificate.
Are excitation and phase verified? Yes — checked along with ratio against our standards.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.






