What is TTR?
TTR stands for Transformer Turns Ratio Tester, a core device in the power industry used to inspect transformer winding turns ratio, connection group, polarity, and errors. It is also an indispensable key instrument in factory acceptance, handover, and preventive testing of transformers. By precisely measuring the voltage ratio between primary and secondary windings, it rapidly identifies potential hazards such as interturn short circuits, wiring errors, tap changer faults, and winding deformation, directly ensuring the safe and stable operation of transformers.
In power field applications, customer priorities center on six dimensions: accuracy, speed, compatibility, blind testing capability, portability, and interference resistance. Common equipment often suffers from issues like falsely advertised accuracy, slow testing, inaccurate blind measurements, and poor field interference resistance. Goldhome addresses these pain points with industry-leading solutions based on proprietary technology.
As a national-level high-tech enterprise and provincial-level specialized, refined, distinctive, and innovative "Little Giant" company, Wuhan Goldhome has dedicated 20 years to developing power testing equipment. Holding over 30 national patents, it has become the preferred brand for power grids, power plants, transformer manufacturers, and new energy sectors.
Goldhome's TTR tester breaks industry norms with an ultra-wide measurement range of 0.9 to 10,000, achieving a transformation ratio resolution of 0.0001 and a phase angle resolution of 0.01°. Its high-voltage side voltage measurement accuracy reaches 0.05%, while the low-voltage side achieves 0.1%-significantly exceeding national standards. The instrument incorporates a proprietary three-phase digital power supply, significantly enhancing interference resistance for stable output even in complex environments. It completes fully automatic three-phase testing within 10 seconds and single-phase testing in just 5 seconds, delivering efficiency far surpassing comparable products.
Addressing high-frequency customer demands, the device supports full blind testing mode. It automatically identifies turns ratio and connection group without requiring nameplates, parameters, or manual selection. Compatible with all transformer types-including Y/Δ, Z-type, rectifier transformers, furnace transformers, and reverse Scott transformers-it resolves testing challenges for specialized transformers. Featuring a lightweight design weighing only 2.3kg (6.5 lbs) with dimensions of 320×240×130mm (12.6×9.4×5.1 inches), it is easily portable with one hand, suitable for various scenarios including elevated locations, fieldwork, and substations.
Equipped with a high-definition color display and intuitive vector graphics, the instrument features built-in data storage, one-touch printing, and USB export capabilities to meet standardized test report requirements. Integrated overvoltage, overcurrent, and discharge protection ensure safe operation. Each unit undergoes full-process calibration and aging tests in the company's dedicated high-voltage testing facility, delivering industry-leading stability and consistency.
Within transformer safety operation systems, the TTR serves as the first critical "health checkpoint." Leveraging proprietary core technologies, stringent quality control, and comprehensive scenario adaptability, Goldhome continuously delivers more precise, efficient, and reliable transformer ratio testing equipment to global power users, supporting the safe and efficient operation of power systems.
