Product Details

Three-Phase Transformer Ratio and Vector Group Tester Detailed Information:

    In the production process of power transformers, whether semi-finished or finished products, before new transformers are put into operation, and according to the preventive test regulations of the State Grid, it is required to regularly test the turns ratio or voltage ratio of operating transformers. Traditional ratio bridges are cumbersome to operate, readings are not intuitive, and necessary conversions are required, with test results only providing the ratio value for one phase. Three-Phase Transformer Ratio and Vector Group Tester overcomes the shortcomings of traditional ratio bridge testing. It features a large high-resolution LCD screen, is powered by lithium battery for convenient field use, has Chinese menu prompts, is easy and intuitive to operate, completes three-phase ratio testing in one go, with fast testing speed and high accuracy.

Three-Phase Transformer Ratio and Vector Group Tester Features:

1. True three-phase testing: Single-phase power input, internally synthesizes a three-phase standard sine wave signal source, through a high-fidelity power amplifier, generates a three-phase test power supply (distortion less than 0.1%) output. Test results have better equivalence, and there will be no misjudgment of vector groups.

2. Powerful functions: It can perform both single-phase measurement and automatic testing of three-phase windings. Both single-phase and three-phase can measure polarity and phase angle, completing in one go the measurement of AB, BC, CA three-phase ratio values, phase angle values, errors, tap positions, tap values, and other parameters, with automatic identification of the vector group number.

3. Phase angle measurement function: Accurately measures the phase angle between the high and low voltage sides, and can measure the ratio and angle of transformers with non-integral tap positions.

4. Hexagonal diagram display function: Test results are displayed in both digital and hexagonal vector diagram forms, allowing intuitive viewing of the transformer connection group.

5. Blind measurement function: No need to select wiring mode or connection group, no external shorting required for measuring Y/△ and △/Y transformers, and the wiring mode can be automatically switched based on the selected test content. It can completely measure the ratio and group number of transformers without nameplates.

6. Tap testing: Can quickly measure the ratio and ratio error at each tap switch position. The rated ratio only needs to be input once, and the ratio error at each tap position can be calculated without repeated input.

7. It has both turns ratio measurement and operating voltage ratio measurement functions. The operating ratio can more truly reflect the actual value of the voltage ratio during actual transformer operation.

8. It has the function of simulating parallel operation of main transformers, allowing analysis of the actual situation when two main transformers operate in parallel.

9. Good vibration resistance: The use of connectors enhances vibration resistance.

10. Revolutionary representation of the magnitude and phase relationships between various voltages and currents in vector diagrams, making it easier for users to intuitively understand the actual significance of each parameter.

11. Uses a 7-inch high-definition color screen to display data and vector diagrams with intuitive and detailed effects.

12. The test source used by this instrument is a digitally synthesized standard sine digital source with distortion less than 0.1%, unaffected by the quality of the working power supply.

13. Portable: Small size, light weight, suitable for field operations. 

14. Optional internal rechargeable battery, allowing testing to be completed without any external power supply on site.