TRM-V Turn Ratio Meter

According to IEC and relevant national standards, transformer ratio test is a necessary item in the process of power transformer production, user handover and maintenance test. This can effectively supervise the quality of transformer products in the process of delivery and use, and prevent transformer turn to turn short circuit, open circuit, connection error, internal fault or contact fault of voltage regulating switch.

This turn ratio meter can accurately measure the transformer ratio and vector group without knowing any nameplate parameters of the transformer to be tested, at the same time, it can accurately measure the phase angle; it can adapt to the needs of various large, medium and small-sized transformer ratio tests (including Z-type transformer, rectifier transformer, electric furnace transformer, non-integral point phase-shift transformer, balance transformer, Scott and inverse Scott transformer).

The instrument uses color LCD, friendly man-machine interface, vector diagram display and wiring judgment to provide a reliable basis for checking the correctness of the circuit. The operation mode of the full touch conductive silica gel keyboard is easy to learn and easy to operate. The instrument has built-in large capacity power-off data memory without loss of data, which can save the field calibration data, and can expand to store up to 1000 groups of field calibration results. It can provide background microcomputer management software, transfer the results to the computer through the U disk, produce reports and print, and realize microcomputer management.

Product characteristics

1.Input single power, internal digital combination standard sine wave test source output

2.Phase angle measurement function: measure the phase angle between high voltage side and low voltage side. Measure the turn ratio and angle of “Non integral point” transformer.

3.It can conduct single-phase measurement and three-phase winding automatic test. Three phase turn ratio value, phase angle value, error, tapping position, tapping value can be measured for once. It also can identify connecting group number automatically.

4.Testing results can be displayed in the form of digit and hexagon vector diagram, which makes transformer connecting group can be made out obviously.

5.With blind test function: There is no need to choose connecting method and group. When measuring Y/△、△/Y transformer, no external short-circuit is needed, connecting method can be shifted automatically according to the chosen testing contents.

6.With tapping test function: TTR and TTR error in the position of each tapping switch can be gauged quickly. Just input rated TTR once, instead of input over and over again, TTR error in tapping position can be calculated.

7.With functions of turns ratio measurement and voltage TTR measurement.

8.With 5.6 inch LCD, the effect of data & figure display is visualized and fine.

9.With small size and light weight, it is easy to carry.

10.With built-in high capacity chargeable lithium battery. Test can be conducted without any power supply on site, and once the battery is charged fully, it can make measurement for more than 500 times continuously.

Technique parameters

1.Measurement range: 0.8~10000.

2.High measurement speed: three-phase test can be completed within 40 seconds.

3.Measurement accuracy:

   Voltage measurement accuracy on HV side: 0.05%

   Voltage measurement accuracy on LV side: 0.1%

   Phase angle measurement accuracy: 0.1°

   Ratio measurement accuracy: 0.1%（0.8－3000）

   0.2%（3000－10000）

4.Size: 320mm*240mm*130mm.

5.Weight: 3KG.

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