![]() ![]() ![]() 238000006467 substitution reaction Methods 0.000 description 5.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co Priority to US265255A priority Critical patent/US2231717A/en Application granted granted Critical Publication of US2231717A publication Critical patent/US2231717A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Westinghouse Electric and Manufacturing Co Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US265255A Inventor Edwin L Harder Current Assignee (The listed assignees may be inaccurate. ![]() Google Patents Polyphase wattmetric relayÄownload PDF Info Publication number US2231717A US2231717A US265255A US26525539A US2231717A US 2231717 A US2231717 A US 2231717A US 265255 A US265255 A US 265255A US 26525539 A US26525539 A US 26525539A US 2231717 A US2231717 A US 2231717A Authority US United States Prior art keywords phase wattmeter responsive line current Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2231717A - Polyphase wattmetric relay ![]()
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