Portable Electromagnetizing Instrument Transformer tester (calibrator) assumes first that there is no significant change of mechanical parameter.
Then it employs electric parameter to map the error model, and compute its error graph. all the error data is obtained from simulated test, including test power source and phatom electronic load, so as to lower down the test power significantly.
Because the simulation signal is applied from the secondary with primary being open circuited, the simulating voltage should assure that insulation between windings should not be damaged, which places high requirement for accurate measurement of feedback current from the secondary in response with the drive voltage.
But actually the feedback current can be as low as serveral miniamp, it is not easy to carry on accurate test without noise undercontrol.
From this point of view, frequency-response analyzing technique being used to complement that defect and focus attention on filters.
Data tested from simulation can be used to re-modify the original model that representing the error characteristics, among which one significant value is leakage inductance, a parameter not easy for direct measurement.
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This is Chinese version talk about electro-magnetic instrument obtained from Pusala Technology.transformer portable test methods.
English version is not available at the present.
But some ideas and views will be discussed in Both Chinese and English.
To correct the above comment:
"This is Chinese version talk about electro-magnetic instrument transformer portable test methods obtained from Pusala Technology.
English version is not available at the present.
But some ideas and views will be discussed in Both Chinese and English."
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