Multifunction Transformer TTR Tester MTH3-TTRA; particularly suitable for Z- winding transformers, rectifier transformers and electrical systems railway Scott, inverse Scott balanced transformer. This tester using a large -screen LCD display, friendly man-machine interface, fully functional , easy to operate, it is the ideal instrument for power system , transformer manufacturers and railway electrical systems transformer ratio , group do not , polarity, and the angle of the testing.
Multifunction Transformer TTR Tester Product Features
1. Suitable for test turns ratio and phase difference of special transformer.
2. Particularly suitable for measuring rectifier transformer with phase shift, intuitively
display angle of phase shift.
3. Automatically generate stable amplitude, phase constant three-phase (120 °) or
two phase (90 °) power supply.
4. Not restricted by the internal wiring mode of the transformer, directly measure
voltage ratio and phase angle difference of HV and LV side.
5. Simultaneous 3-phase measurement.
6. Disposable set test parameters, test directly after converting tapping switch,
automatically determine tap position and standard ratio.
7. Fast speed, test time 8 seconds.
8. Test results are not affected by power-frequency power frequency and
9. Internal protection function with over-current protection, high and low voltage
reverse connection protection.
10.Can completely by the host computer to control the whole testing process, save the
data, print the test report.
11.Auto save the test results, up to 99 groups.
Ratio measuring range 1~10000
Group range 1~12
Accuracy 1~1000:0.2; 1000~2000:0.5; 2000~10000:1
Angular resolution 0.01°
Power supply 220V±22V ,50Hz±1Hz
Relative Humidity ≤85%, no condensation
What is TTR Device?
Transformer Turning Ratio Tester TTR is designed to measure transformer winding ratio or voltage turn ratio of three-phase or single-phase power transformers. Transformer testers have areas of use such as voltage, current amplification and reduction. Turning ratio changes are seen between the windings in the transformer over time. These differences in the conversion ratio may cause under or over billing in the measurement transformers.
Why Is It Important That The Turning Ratio Does Not Change?
The change in the conversion ratio over time will ensure that the output voltage from the secondary of the transformer is not at the desired value. Different from the values that will be reflected to the output outside the current/voltage values designed in production, a voltage/current value that is less than required or a voltage/current value more than required may cause insulation problems in systems, unbalanced loads, sudden trips in switchgear elements and fires.
How to Calculate Conversion Rate?
Due to environmental factors such as dust and humidity over time, some changes in the turning ratios are inevitable. To determine the turning ratio of an ideal transformer, a known input voltage is applied to one of the windings. The output voltage is measured. The winding ratio is determined by proportioning the input and output voltage values. Thus, the ratio found and the value written on the transformer label must be the same as determined in the production of the transformer.
How Should TTR Device Selection Be?
Devices known as TTR Devices are used for testing the conversion ratios of transformers. When using these testers, it is necessary to consider the size and parameters of the transformer. Because many businesses can use transformers at different voltage levels and powers. Therefore, the test device to be used should be selected according to the appropriate parameters. It should be able to perform the conversion rate tests of the transformer fully automatically without any problems and give the result information accurately.