LEADER 01742nam 2200349 450 001 9910135768903321 005 20231206190641.0 010 $a0-7381-0907-X 024 7 $a10.1109/IEEESTD.1980.8704479 035 $a(CKB)3780000000089305 035 $a(NjHacI)993780000000089305 035 $a(EXLCZ)993780000000089305 100 $a20231206d1980 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aANSI/IEEE Std C57.13.1-1981 $eIEEE Guide for Field Testing of Relaying Current Transformers /$fInstitute of Electrical and Electronics Engineers 210 1$aNew York, New York :$cIEEE,$d1980. 215 $a1 online resource (17 pages) 330 $aA description is given of field-test methods that will ensure that the current transformers used as a source of relay input current are connected properly, are of marked ratio and polarity, and are in condition to perform as designed both initially and after a period of service. The standard covers safety considerations; current transformer types and construction and the effect of these on test methods; insulation resistance tests; ratio tests; polarity check; winding and lead resistance (internal resistance); excitation tests; burden measurements; and specialized situations. 517 $aANSI/IEEE Std C57.13.1-1981: IEEE Guide for Field Testing of Relaying Current Transformers 606 $aCurrent transformers (Instrument transformer) 615 0$aCurrent transformers (Instrument transformer) 676 $a621.314 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a9910135768903321 996 $aANSI$92072434 997 $aUNINA