According to IEC and relevant national regulations, semi-finished and finished products in the production process of transformers, as well as newly installed and overhauled transformers, must undergo transformer ratio testing before being put into operation. In the "Regulations for Handover and Prevention of Electrical Equipment", it is also required to regularly measure the transformation ratio of operating transformers. Transformer ratio testing can check the condition of the transformer windings and tap changers, determine whether there are defects such as coil short circuits, connection errors, and turn to turn short circuits in the transformer, and ensure the safe use of the equipment.

Developed and produced by our companyYHBB Transformer Ratio TesterUsing a 32-bit ARM core as the processing core to control the entire machine. Achieved one-time measurement of the transformation ratio of single-phase or three-phase transformers. All instrument operations are displayed in Chinese menus, which are simple and intuitive. The test results are accurate and reliable, and can be stored and printed. Strong anti-interference ability. Can meet the needs of various large, medium, and small transformer ratio tests.

1. Fast testing speed, high accuracy, and good repeatability.

2. Capable of testing PT and Z-shaped connected transformers.

3. Can automatically test the ratio and group number.

4. One start-up can automatically measure the winding ratio value and calculate parameters such as ratio error, tap point position, tap value, polarity, etc.

5. It can automatically store measurement results, and this instrument is equipped with a built-in power-off memory and a micro printer, which can print all data.

6. The large LCD Chinese display menu is intuitive and convenient to operate.

7. The instrument is compact and lightweight, suitable for field operations.

1. The main technical indicators and usage conditions are shown in the table below

1) AC220V: AC220V power socket with built-in switch and fuse.

2) Grounding post: Instrument grounding terminal.

3) A, B, C, O: Connect the high voltage side of the test object to the corresponding high voltage side of the test object using a red sheathed test wire. Single phase testing is for phases A and B.

4) A, b, c, o: Connect the low voltage side of the tested object to the low voltage side of the test object using a black protective sheath. Single phase testing is for phases a and b.

5) 0-9.: Number keys, decimal point, used for inputting numbers when setting parameters.

6) Reset button: Used for resetting and initializing the entire machine, it can return to the initial state from any state

7) Confirm key: the final confirmation of the main and sub menu function selection for the input parameter content;

8) Select key: The cursor is located at the current selected position, press this key to cycle through the selection.

9) Return key: Return to the previous menu.