TTR Tester Repair

TTR Tester Repair & Calibration

June Company repairs and calibrates transformer turns ratio (TTR) testers from every major manufacturer, including Megger, ISA/Altanova, Tettex, Vanguard Instruments, and Phenix Technologies. We service single- and three-phase turns ratio meters, winding resistance meters, and power factor/tan delta sets — restoring ratio accuracy and bringing each unit back to manufacturer specification with NIST-traceable calibration.

Models We Commonly Repair

Megger TTR300, TTR310, TTR330, MTO210/300/330, MCTT-10, and IDAX300/350; ISA T 2000, T 3000, TD 5000, and TDX 5000; Tettex 2292, 2293, TTR 2795/2796, and Midas 2880; Vanguard ATRT-01/01B/03, TRF-250, TRM-20/40, and WRM-10P; and Phenix TTS10M. If your model isn’t listed, we almost certainly still service it — send us the details.

Common Faults We Resolve

Out-of-tolerance ratio accuracy, measurement bridge drift, damaged test leads and Kelvin clips, excitation source failure, internal reference degradation, display and keypad faults, and battery or power-supply problems. Every repair includes full functional testing and NIST-traceable calibration across the unit’s measurement ranges, documented on a calibration certificate.

Why Utilities and Test Labs Choose Us

Most repairs finish in 5–10 business days, every job carries a 90-day parts-and-labor warranty, and your evaluation fee is credited toward the repair. We serve electric utilities, transformer manufacturers, substation crews, and independent test labs from our Oregon facility.

Frequently Asked Questions

How much does TTR tester repair cost? Repairs start at a flat evaluation fee that’s credited toward your final repair cost. You receive a firm quote before any work begins.

How long does it take? Most units are completed within 5–10 business days of arrival.

Do you provide a calibration certificate? Yes — every repair includes NIST-traceable calibration with documented results.