Translation of CT classes between IEC and ANSI
Translation of CT classes between IEC and ANSI
(OP)
I need some way of translate IEC CT class 0,2 to an ANSI Class C??? are there any standard way of doing this?
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Translation of CT classes between IEC and ANSI
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Translation of CT classes between IEC and ANSITranslation of CT classes between IEC and ANSI(OP)
I need some way of translate IEC CT class 0,2 to an ANSI Class C??? are there any standard way of doing this?
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RE: Translation of CT classes between IEC and ANSI
IEC defines the burden as a VA, i.e. Cl. 0.2 - 15 VA. IEEE defines burden as impedance, i.e., 0.3B1.8 (up to 1.8 ohms).
RE: Translation of CT classes between IEC and ANSI
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Application IEC Class ANSI Class
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Precision measurement & calibartion 0.1 0.3
Accurate pwr & tariff metering 0.2 0.3
Tariff & accurate measuring instruments 0.5 0.6
Industrial Meters: V, I, P, meters 1 1.2
Ammeter or volmeters, overcurrent/V relay 3 1.2
Current Transf. protective cores 5P,10P C,T
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SOURCE: ABB Switchgear Manual, 10th edition.
RE: Translation of CT classes between IEC and ANSI
That info is slightly dated, whereas the IEEE equal for the first 2 IEC classes listed is the 0.15 class.