■ functional features of handheld transformation ratio tester

▲ true three-phase test: single-phase power input, internal digital synthesis of three-phase standard sine wave signal, and three-phase power output through high-power amplifier, with small distortion, high stability and high phase to phase symmetry. The test results have better equivalence, and there will be no group misjudgment and other phenomena.

▲ it can not only carry out single-phase measurement, but also realize the automatic test of three-phase winding. Both single-phase and three-phase can measure the polarity and phase angle. It can measure the variable ratio, error, tapping position, tapping value and other parameters of AB, BC and Ca at one time, and automatically identify the group number.

▲ simple operation: there is no need to select the wiring mode and wiring group. There is no need for external short circuit for measuring Y / △, △ / y transformers. The wiring mode can be switched automatically according to the selected test content.

▲ tapping test: it can quickly measure the transformation ratio and transformation ratio error at each tapping switch position. The rated transformation ratio only needs to be input once, and the transformation ratio error at each tapping position can be calculated without repeated input.

▲ the built-in rechargeable battery can be used as the working power supply, and there is no need to look for the working power supply on site. (optional function)

▲ the concept of measuring phase angle is introduced into the transformation ratio measurement, which can measure the phase angle of any angle between the high-voltage side and the low-voltage side.

▲ it can test the transformation ratio and group (phase angle) of single-phase transformer, three-phase transformer, Z-type transformer, rectifier transformer, Scott transformer, inverse Scott transformer and other types of transformers.

▲ the 7-inch high-definition color screen is used to display the data effect and vector diagram, which is intuitive and exquisite.

▲ the magnitude and phase relationship between each voltage and current are expressed intuitively by vector diagram, so that users can understand the practical significance of each parameter more easily subjectively.

▲ the test source used in this instrument is a standard sinusoidal digital source of digital synthesis, which has small distortion and is not affected by the working power supply.

■ technical parameters

▲ measurement range of transformation ratio: 0.8-10000

▲ group: 0-11

▲ accuracy:

● level 0.1 0.8 － 2000

● level 0.2 2000-5000

● level 0.3 5000-10000

▲ overall dimension: 20mm × 240mm × 130mm

▲ phase difference test range: 0 ~ 360 °

▲ phase measurement accuracy: 0.2 °

▲ phase difference resolution: 0.001 °

▲ instrument power input: 220V ± 22V, 50Hz ± 1Hz

▲ weight: 3kg