Iec 60044-6 Pdf Free Download

[Maya Malbon]

Currenttransformers (CTs) are critical components in many electrical systems. They are used to step down high current levels to levels that can be safely measured by instruments or protective relays.

The behavior of inductive CTs in accordance with IEC 60044-1 and IEEE C57.13 isspecified for steady-state symmetrical AC currents. The more recent standard IEC 60044-6is the only standard that specifies the performance of inductive CTs (classes TPX, TPY andTPZ) for currents containing exponentially decaying DC components of the defined timeconstant. This section summarises the various classes of CTs.

Class P current transformers are defined so that, at rated frequency and with rated burdenconnected, the current error, phase displacement and composite error shall not exceed thevalues given in the table below.

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