Transformer TTR
Our Transformer Turns Ratio (TTR) Tester is a device used to measure the turns ratio between the primary and secondary windings of transformers. It is widely used by transformer manufacturers, power companies, and substations for ratio group testing, PT and CT ratio polarity testing, and to ensure compliance with design specifications.
Why Choose Us?
Our company has been specializing in the production and manufacturing of frequency series resonance devices for 21 years, with a modern intelligent factory covering over 40,000 square meters and more than 100 automated production, manufacturing, assembly, and testing equipment. We have obtained CE certification and currently serve over 20,000 customers worldwide.
Quotation within 1 hour – Solution within 24 hours - Product demonstration available - Strict contract performance
On-time delivery - 12-month warranty – Optional extended warranty - Factory acceptance testing
Authorized calibration (optional) - Worldwide training support – Regular follow-up visits
Product Features
1.Dual Power Supply Options – Operates on a lithium battery or 220V AC power, allowing more than 100 continuous tests per charge.
2.Blind Testing Function – Conducts ratio and group testing without prior knowledge of high- and low-voltage connections.
3.Comprehensive Testing Capabilities – Supports conventional transformer tests, Z-type transformer tests, PT tests, and CT ratio polarity tests, expanding its application range.
4.High Accuracy and Wide Measurement Range – Measures up to 10,000:1 turns ratio with 0.3% accuracy at maximum range.
5.Advanced Protection Functions – Includes reverse connection protection and output short-circuit protection.
6.Large Industrial-Grade Display – 5.6-inch high-brightness color LCD screen, clearly visible even in strong sunlight.
7.Built-in Thermal Printer – Allows on-site printing of test results.
8.Flexible Data Storage – Supports both local and USB storage, ensuring convenient data management.
What does this instrument test?
The Transformer TTR Tester is used to measure the transformer turns ratio (TTR).
✔ Main test items:
HV/LV winding ratio
Three-phase ratio consistency
Phase displacement
Vector group identification
Polarity check
📌 Purpose:
To verify whether the transformer winding ratio matches the design and ensure correct voltage conversion.
Why is TTR testing important?
✔ It helps confirm:
Incorrect winding connections
Improper turns ratio
Manufacturing defects
Internal open or short circuits
Tap changer position errors
📌 Any TTR deviation indicates a serious transformer defect.
What is the testing principle?
An AC excitation signal is applied to one side of the transformer, and the induced voltage on the other side is measured to calculate the ratio.
📌 Formula:
TTR = V1 / V2
👉 UHV systems use precision AC sources and digital sampling technology.
Which standards does it comply with?
IEC 60076 (Power transformers)
IEEE C57 series
GB/T 1094
DL/T power industry standards
👉 UHV instruments support both IEC and IEEE standard modes.
Measurement accuracy and range
Typical UHV configuration:
Ratio range: 1:1 up to 10,000:1 or higher
Accuracy: ±0.1% or better
Phase accuracy: ≤2 min
Automatic voltage adjustment
Does it support three-phase testing?
✔ Yes:
Automatic three-phase switching
Phase deviation calculation
Three-phase balance analysis
Automatic report generation
Procurement recommendations (UHV perspective)
✔ Power utilities / substations:
Standard three-phase TTR tester
✔ Transformer manufacturers:
High-accuracy model with OLTC analysis
✔ Testing laboratories:
High-precision version with advanced data analysis and reporting system
21 years professional manufacturer and supplier in china, standardized factory, best product quality, and cheap wholesale prices！！！
As one of the leading transformer ttr manufacturers and suppliers in China, we warmly welcome you to buy high-grade transformer ttr made in China here from our factory. For price consultation, contact us.