I. Overview

HTT-ATransformer Ratio Tester, featuring an exquisite circuit design and unique approach, boasts superior performance, comprehensive functions, compact size, and light weight. The instrument employs an electronic standard transformer as the measurement reference, ensuring long-term stable and reliable accuracy. It has an automatic measurement function, allowing for the automatic completion of three-phase ratio, winding connection method, and group numbering without any parameter settings.

HTT-A—— New Concept for Ratio Testing!!!

2.Wiring and precautions:

1. Please connect and operate the instrument according to the instructions in this user manual.

2. The grounding terminal or the grounding wire should be connected to a reliable ground point as close as possible.

3. Please note that when wiring, do not reverse the high-voltage and low-voltage leads.

4. Please note that there are four test lines in yellow, green, red, and black, respectively corresponding to the transformer's high-voltage side.A, B, C, and O terminal connections, with yellow, green, red, and black test wires on the low-voltage side, corresponding to the transformer's a, b, c, and o terminals, respectively. Do not connect them incorrectly. For transformers without a neutral point, the corresponding black test wire can be left open. For measuring single-phase transformers, use the high-voltage side A, B, and low-voltage side a, b test clips.

5. Please enter the correct parameter settings before testing, the group number must match the transformer being tested. If uncertain, use the group analysis or automatic measurement function.

6. In the Test Menu"Standard Type" refers to standard Y/Y, Y/D, D/D, D/Y connection group transformers. The "Z-Type" refers to ZN/Y or ZN/D connection group transformers. The menu selection must match the transformer being tested.

7. If the rated ratio is not entered, the test results will only display the measured ratio, without showing the error.

8. The unit's phase analysis function displays winding connection methods and phase numbers on both high and low voltage sides. In cases of severe residual magnetism within the transformer, there may be errors in identifying the connection methods, but it does not affect the phase numbers, nor does it impact the measurement results of the transformer ratio and errors, or the functionality of the unit.

9. For phase difference not on either high or low voltage sidesZ-type transformers in multiples of 30° and other special transformers; special requirements can be made to our company.

III.Main Functions and Features:

1. Fully automatic ratio measurement function, no need to set any parameters for automatic completionThree-phase transformer ratio, winding connection method, and group marking numbersMeasurement, easy operation, one touch and done.

2. Automatically measure transformer voltage ratios, including three-phase continuous measurement and single-phase measurement, and calculate ratio errors.

3. MeasurableTransformers of various connection types, including Y/y, Y/d, D/y, D/d, ZN/y, ZN/d, etc.

4. Measurable for both high and low pressure sidesWinding connection method and group numberingEspecially suitable for transformer measurement in unknown groups.

5. Comprehensive protection features, including overload protection with quantitative output and overvoltage protection.

6. At higher excitation currentsAutomatic voltage reductionFor transformers suitable for low rated voltages and high magnetizing currents.

7. Automatically tracks and measures loaded tap position without the need to re-enter parameters.

8. Storable1000 measurements with data retention during power loss.

9. Compact, lightweight, precise measurements, fast speed.

10. Color touch screen operation, intuitive and convenient.

11. Features Bluetooth transmission capability.

12. Non-volatile calendar and clock.

IV. Main Technical Specifications:

1. Ratio Measurement Range:  0.8—5000

2. Ratio measurement accuracy:  0.1%（0.8—1000）

0.2% (1000—2000)

0.5% (2000—5000)

3. Measure Try Electricity Pressure:   AC20Ｖ—220Ｖ

4. Worker Please provide the Chinese content you would like translated into American English. Warm Degree:   -１０℃—４０℃

5. Ring No Chinese content provided. Wet Degree:   １０%—８５%

6. Body       Accumulated:   380×260×160mm

7. Please provide the Chinese content to be translated.       Quantity:   6Kg (excluding test line)