Relay (English Wikipedia)

Edvard (2013-03-09). "Working Principle of Thermal Motor Protection Relay". Electrical-Engineering-Portal.com. Electrical Engineering Portal. Retrieved 2017-12-30.

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"Overload relay - Principle of operation, types, connection". www.electricalclassroom.com. 2020-02-15. Retrieved 2022-06-13.

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"Arc Suppression to Protect Relays From Destructive Arc Energy". Retrieved December 6, 2013.

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"Optocoupler Tutorial". 16 September 2013.

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Section 1.6, Engineers' Relay Handbook, 5th ed, Relay and Switch Industry Association, Arlington, VA; 3rd ed, National Association of Relay Manufacturers, Elkhart Ind., 1980; 2nd Ed. Hayden, New York, 1966; large parts of the 5th edition are on line here Archived 2017-07-05 at the Wayback Machine.

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"Relay". EtymOnline.com.

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Mason, C. R. "Art & Science of Protective Relaying, Chapter 2, GE Consumer & Electrical". Archived from the original on October 29, 2009. Retrieved October 9, 2011.

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US 1647, Morse, Samuel E.B., "Improvement in the Mode of Communicating Information by Signals by the Application of Electromagnetism", published June 20, 1840 Patent US1647 - IMPROVEMENT IN THE MODE OF COMMUNICATING INFORMATION BY SIGNALS BY THE - Google Patents. Archived from the original on May 24, 2012. Retrieved September 6, 2011.{{cite book}}: CS1 maint: bot: original URL status unknown (link)

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"Relay Automatic Telephone Company". Retrieved October 6, 2014.

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"The electromechanical relay of Joseph Henry". Georgi Dalakov. Archived from the original on 2012-06-18. Retrieved 2012-06-21.

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"Safety Compendium, Chapter 4 Safe control technology" (PDF). p. 115.

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Riba, J.R.; Espinosa, A.G.; Cusidó, J.; Ortega, J.A.; Romeral, L. (November 2008). Design of Shading Coils for Minimizing the Contact Bouncing of AC Contactors. Electrical Contacts. p. 130. Retrieved 2018-01-07.

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"Understanding Relays & Wiring Diagrams". Swe-Check. Retrieved 16 December 2020.

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"The Electromagnetic Telegraph". Archived from the original on 26 January 2021. Retrieved 14 March 2019.
"The electromechanical relay of Joseph Henry". Georgi Dalakov. Archived from the original on 2012-06-18. Retrieved 2012-06-21.
US 1647, Morse, Samuel E.B., "Improvement in the Mode of Communicating Information by Signals by the Application of Electromagnetism", published June 20, 1840 Patent US1647 - IMPROVEMENT IN THE MODE OF COMMUNICATING INFORMATION BY SIGNALS BY THE - Google Patents. Archived from the original on May 24, 2012. Retrieved September 6, 2011.{{cite book}}: CS1 maint: bot: original URL status unknown (link)
Mason, C. R. "Art & Science of Protective Relaying, Chapter 2, GE Consumer & Electrical". Archived from the original on October 29, 2009. Retrieved October 9, 2011.
Section 1.6, Engineers' Relay Handbook, 5th ed, Relay and Switch Industry Association, Arlington, VA; 3rd ed, National Association of Relay Manufacturers, Elkhart Ind., 1980; 2nd Ed. Hayden, New York, 1966; large parts of the 5th edition are on line here Archived 2017-07-05 at the Wayback Machine.
"British Telecom History 1912-1968". Archived from the original on October 14, 2014. Retrieved October 8, 2014.

worldradiohistory.com (Global: 127^th place; English: 68^th place)

Osborne, H.S.; Dowling, A.M. (July 1932). "The Electrical Discoveries of Joseph Henry" (PDF). Bell System Technical Journal. 11 (Supplement): 1–22. Bibcode:1932BSTJ...11T27.xO. doi:10.1002/j.1538-7305.1932.tb00627.x.
Alexandrovich, George. "The Audio Engineer's Handbook" (PDF). Db: The Sound Engineering Magazine. September 1968: 10.

yarchive.net (Global: low place; English: low place)

Varney, Al L. (1991). "Questions About The No. 1 ESS Switch".

Relay (English Wikipedia)

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