2021
DOI: 10.1515/teme-2020-0086
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Optimised calibration programmes for comparators for instrument transformers

Abstract: Traditionally, instrument transformers are calibrated using bridges. By definition, bridges use the null method of measurement. The traditional calibration programme for instrument transformer bridges characterise namely this null measurement. Many new commercial comparators for instrument transformer use a very different method. They sample the secondary signals of reference and device under test (dut) transformer independently. Based on the samples, magnitude and phase of both signals are determined. Ratio e… Show more

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Cited by 3 publications
(1 citation statement)
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“…If the comparator is a traditional bridge, it is calibrated using an error generator [33]. If the comparator is not a traditional bridge, but a sampling-based system, the calibrator can be similar to the system discussed above [34].…”
Section: Extension Beyond 21 a And 700 V 51 Extension Using Amplifiersmentioning
confidence: 99%
“…If the comparator is a traditional bridge, it is calibrated using an error generator [33]. If the comparator is not a traditional bridge, but a sampling-based system, the calibrator can be similar to the system discussed above [34].…”
Section: Extension Beyond 21 a And 700 V 51 Extension Using Amplifiersmentioning
confidence: 99%