Transformer ratio test can effectively supervise the quality of transformer products during factory delivery and use, prevent inter turn short circuits, open circuits, connection errors, internal faults or contact faults of voltage regulating switches. Our company has independently developed, researched, and produced a multifunctional handheld automatic transformer ratio tester that is easy to operate, fully functional, and has stable and reliable data according to the user's on-site usage requirements. In addition, it can also be used for blind measurement (accurately measuring the transformer ratio value and group number without knowing the nameplate parameters of the tested transformer, while accurately measuring the phase angle); It can adapt to the needs of various large, medium and small transformer ratio tests (including Z-type transformers, rectifier transformers, electric furnace transformers, non integral phase-shifting transformers, traction transformers, Scott and inverse Scott transformers), and is currently a comprehensive ratio tester with complete testing projects and measurement parameters.

1. True three-phase testing: single-phase power input, internal digital synthesis of three-phase standard sine wave signal source, through high fidelity power amplifier, generates three-phase test power output (distortion less than 0.1%, symmetry better than 0.05%), the test results have better equivalence, and there will be no group misjudgment or other phenomena.

2. Strong functionality: It can perform single-phase measurement and automatic testing of three-phase windings. Polarity and phase angle can be measured for both single-phase and three-phase. It can measure the transformation value, phase angle value, error, tap position, tap value and other parameters of AB, BC, CA phases in one go, and automatically identify the group number.

3. Phase angle measurement function: Accurately measure the phase angle between the high and low voltage sides, and can measure the transformation ratio and angle of non integer point transformers.

4. Hexagonal diagram display function: The test results are displayed in numerical and hexagonal vector diagrams, which intuitively show the connection group of the transformer.

5. Blind testing function: No need to select the wiring method or wiring group, measuring Y/△ and △/Y transformers does not require external short circuiting, and the wiring method can be automatically switched according to the selected testing content. It is possible to measure the transformation ratio and group number of transformers without nameplates.

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

7. At the same time, it has two functions: measuring the turns ratio and measuring the operating voltage transformation ratio. The operating transformation ratio can more accurately reflect the actual value of the voltage transformation ratio of the transformer in actual operation.

8. Good anti vibration performance: The use of military connectors enhances the anti vibration performance.

9. Adopting a 5.6-inch high-definition true color LCD screen, the display of data and vector graphics is intuitive and delicate.

10. The test source used in this instrument is a standard sine digital source synthesized digitally, with a distortion of less than 0.1%, and is not affected by the quality of the working power supply.

11. Convenient to carry: small size and light weight.

12. High capacity lithium-ion rechargeable batteries can be optionally installed, allowing for on-site testing without the need for a power source. With a single full charge, it can perform over 800 consecutive measurements.

1. Variable ratio measurement range: 0.8 to 10000.

2. Fast measurement speed: Complete three-phase testing within 1 minute.

3. Measurement accuracy: The measurement accuracy of the high voltage side voltage is 0.05%

The measurement accuracy of low-voltage side voltage is 0.1%

Phase angle measurement accuracy: 0.1 °

Variable ratio measurement accuracy 0.1% (0.8-3000)

0.2% (3000-10000)

According to user requirements, equipment with a full range of 0.1 level can be customized

4. Convenient to carry and suitable for field operations.

5. Weight: 3Kg