The transformer turns ratio(TTR) test is one of the fundamental transformer routine tests declared defined in both IEC 60076-1 and IEEE C57.12.90. The transformation ratio test of the transformer is a test to verify whether the transformer can achieve the specified voltage conversion effect and whether the transformation ratio conforms to the technical conditions of the transformer or the value specified on the nameplate. The purpose is to check whether the number of turns of each winding, the assembly of lead wires, and the indication position of the tap changer meet the requirements; The parallel operation of small and medium-sized transformers with a ratio difference of 1% will generate a circulating current of 10% of the rated current in the transformer windings, which will greatly increase the loss of the transformer and be detrimental to the operation of the transformer.
JYT-F turns ratio tester Demo Video:
JYT-F turns ratio tester Function:
1. Fit for distribution transformer to 1000kV transformer
2. JYT-F transformer turns ratio tester has wide test turns ratio range up to 0.9-10000.
3. Able to perform a three-phase test in 6 seconds.
4. asy to find short-circuit in windings via current-injection function
5. Can test CT, PT,CVT and Z connection of transformers.
6. With blind-test function for testing turns ratio and connection group type of power transformer.
7. Time,date and data saved automatically as power failure.
8. JYT-F equipped with 480 groups data stored, Large screen display, printing with thermal printer inside, with RS485 communication interface and U flash disk memory interface
9. Protection function from transformer short-circuit, turn-to-turn short-circuit , high-low voltage reverse and mis-connection to 380V voltage.
JYT-F turns ratio tester is a professional testing equipment which is suitable for transformer manufactures, transformer service industries, substation maintenance companies, power transformer /distribution transformer maintenance companies and other transformer testing fields, Kingrun series turns ratio testers have reliable capability, accurate testing results and long working life, it was selected by SIEMENS and ABB transformer manufacture and transformer service companies.
JYT-F Technology Specification:
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Type |
JYT-F |
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Figures on Display |
5 digit LCD display |
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Output Voltage |
AC160V |
AC10V |
Auto (powered by DC Battery) |
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Ratio Range |
0.9 -10,000 |
0.9 - 500 |
0.9 - 5000 |
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Accuracy |
<500 |
0.1% ±2 digits |
≤150 |
0.1% ±2 digits |
≤1000 |
0.1% ±2 digits |
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500-2000 |
0.2% ±2 digits |
150- 500 |
0.3% ±2 digits |
1000-5000 |
0.3% ±2 digits |
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>2000 |
0.3% ±2 digits |
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Minimum Resolution |
0.0001 |
Rechargeable lithium battery |
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Power Supply in Operation |
AC220V±10%,50Hz±1Hz |
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Stored Test Data |
50 groups |
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Operation inTemperature |
-20℃~+40℃ |
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Relative Humidity |
≤80%RH, non-condensing |
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Volume / Weight |
Length 395mm Width 240mm Height 250mm / 6 kg |
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JYT-F Transformer Turns Ratio Testing Connection:
JYT-F select series NEC Microprocessor to make sure high testing accuracy.
Unlike traditional flip-cover testers, the JYT features an open-end terminal design, allowing test leads to connect in any direction. This prevents cable bending, ensures accurate results, and makes setup faster in tight spaces — ideal for frequent field testing.
It’s designed for power, distribution, CT, PT, and OLTC transformers across multiple voltage levels.
Kingrun Transformer Instrument Co.,Ltd.
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