%0 Generic %C [S.l.] : %D 2017. %I IEEE, %@ 9781504441797 %@ 1504441796 %T PC57.12.20/D6, July 2017 - IEEE Draft Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below. %U http://SK8ES4MC2L.search.serialssolutions.com/?sid=sersol&SS_jc=TC_036445931&title=PC57.12.20%2FD6%2C%20July%202017%20-%20IEEE%20Draft%20Standard%20for%20Overhead-Type%20Distribution%20Transformers%20500%20kVA%20and%20Smaller%3A%20High%20Voltage%2C%2034%20500%20V%20and%20Below%3B%20Low%20Voltage%2C%207970%2F13%20800Y%20V%20and%20Below