Resources
Q
What is the measuring principle of the turn-to-turn insulation tester?
(The impulse coil tester needs to test its electrical performance under the condition of not damaging the DUT. The first condition is that the quality of the coil can be judged in a short moment.) During the measurement, the same pulse as the standard coil measurement is passed through the capacitor. Discharge is applied to the coil under test. Due to the existence of coil inductance and Q value, it will respond to a voltage attenuation waveform corresponding to the discharge pulse. Comparing some characteristics of the attenuation waveform, it can detect short circuits and loops between coils and layers. The difference between the number and the magnetic material, by applying a high voltage pulse, judges the insulation failure based on the appearance of corona or inter-layer discharge.
Q
What are the functions of the turn-to-turn insulation tester?
The functions are-area comparison, area difference comparison, corona discharge comparison, phase difference comparison.
Q
Will the turn-to-turn insulation tester damage the tested part?
Because it is a short moment to judge the quality of the coil, the turn-to-turn insulation tester will not damage the tested part.
Q
Why does the voltage of TH2881A and TH2882 series test the same device with a lot of difference in order to display the same?
The voltage of TH2881A is 1.4 times that of TH2882-3/-5, and the energy is 2 times (U*U*C).
Q
What are the advantages of the program-controlled interlayer insulation withstand voltage tester and the old-fashioned CRT tube?
The program-controlled interlayer instrument does not need to be preheated. It is significantly better than the simulated interlayer instrument in terms of test speed and test accuracy. Compared with the analog interlayer withstand voltage instrument in terms of service life and subsequent maintenance, Big advantage.
Q
Can TH2882 test coils with small inductance?
Yes.
Q
Since the area can see the "fire", "short circuit" and "open circuit" between the layers, what is the significance of the difference in area and corona?
The degree of detail is different.
Q
If the area of the measured waveform has a 20% jump, but the waveform is relatively smooth and has no glitches, is the motor good or bad, and is it usable?
Not necessarily.
Q
What are the functions of the transformer tester?
The test covers various low voltage parameters of the transformer, including inductance L, leakage inductance Lk, turns ratio Turn-ratio, DC resistance DCR, impedance Z, inter-coil capacity C, quality factor Q, series equivalent resistance ESR, Phase, Ps pin short-circuit check and balance BL comparison function, etc.
Q
What series of transformer testers are there?
There are TH2818 series: TH2818XA/XB/XC, TH2819 series: TH2819XA/XB.
Q
What is the difference between TH2818(2819)XA and TH2818(2819)XB?
In addition to the transformer function of TH2818 (2819) XB, TH2818 (2819) XA also has the function of LCR bridge.
Q
How to deal with when the transformer test data is different?
When the transformer test data is different, you can use the deviation subtraction function to correct the data, you can also test several times, and clear it if possible.
Q
Which coils can the coil tester test?
The coil tester can test the coils of motors, high and low voltage packages, transformers, and relays.
Q
Why is the turns ratio inaccurate?
It may be caused by the magnetic properties of the transformer, magnetic leakage, and poor instrument accuracy.
