2014
DOI: 10.1016/j.epsr.2013.09.007
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The source of the inductive current transformers metrological properties deterioration for transformation of distorted currents

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Cited by 25 publications
(21 citation statements)
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“…No increase of this component of determined composite error for such conditions, in relation to the situation, when sinusoidal current is transformed, indicate that there is no magnetic core saturation and there is no need to decrease tested CT secondary winding load. However, taking into consideration, that the percentage composite error determined for distorted current exceed 0.3%, to ensure high accuracy of harmonics transformation, rated load active power of tested CT secondary winding should be reduced to 10 W [11,12]. This is due to the fact, that in such non-sinusoidal conditions for the same maximum magnetic field strength in the magnetic core, higher maximum magnetic flux density is obtained.…”
Section: Tested Cts and Results Of The Measurementsmentioning
confidence: 99%
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“…No increase of this component of determined composite error for such conditions, in relation to the situation, when sinusoidal current is transformed, indicate that there is no magnetic core saturation and there is no need to decrease tested CT secondary winding load. However, taking into consideration, that the percentage composite error determined for distorted current exceed 0.3%, to ensure high accuracy of harmonics transformation, rated load active power of tested CT secondary winding should be reduced to 10 W [11,12]. This is due to the fact, that in such non-sinusoidal conditions for the same maximum magnetic field strength in the magnetic core, higher maximum magnetic flux density is obtained.…”
Section: Tested Cts and Results Of The Measurementsmentioning
confidence: 99%
“…In the same time the main component of composite error is decreasing (as also in the other cases shown in Table 3), as a result of the decrease of phase displacement for transformation of the main harmonic of distorted current. This is caused by the decrease of magnetic core permeability (decrease in slope of the magnetization curve) and the increase of reactive component of the magnetizing current with, at the same time, no change in the active power losses in magnetic core and no change of the active component of magnetizing current [11]. Calculated, in the third step of pre-selection procedure Fig.…”
Section: Tested Cts and Results Of The Measurementsmentioning
confidence: 99%
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