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AC contactor for pump application. A contactor is an electrically controlled switch used for switching an electrical power circuit. [1] A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch.
Date: 23 December 2020: Source: This file was derived from: IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (20).svg (in English) (1993) 315-1975 - IEEE Standard American National Standard Canadian Standard Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters), IEEE, p. 73 DOI: 10.1109/IEEESTD.1993.93397.
IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (12).svg (in English) (1993) 315-1975 - IEEE Standard American National Standard Canadian Standard Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters), IEEE, p. 62 DOI: 10.1109/IEEESTD.1993.93397. ISBN: 0738109479. Author
(in English) (1993) 315-1975 - IEEE Standard American National Standard Canadian Standard Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters), IEEE, p. 60 DOI: 10.1109/IEEESTD.1993.93397. ISBN: 0738109479. Author
Normally closed mercury relay, with coil around top of tube and adjustable angle. A mercury relay (mercury displacement relay, mercury contactor) is a relay that uses mercury as the switching element. They are used as high-current switches or contactors, where contact erosion from constant cycling would be a problem for conventional relay contacts.
The "coil" (output of a rung) may represent a physical output which operates some device connected to the programmable controller, or may represent an internal storage bit for use elsewhere in the program. A way to recall these is to imagine the checkers (contacts) as a push button input, and the actuators (coils) as a light bulb output.
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as 51, with choke coil 59 AC out, rectifier in, light switch 51, 51-, 51a 59a charge, rotor out 59 64 generator control light Generator, voltage regulator; 61 charge indicator (charge control light) B+ battery + 51, 51B+, B+30, B+51 B- battery - 31B- D+ dynamo/alternator diode+ D- dynamo/alternator diode- DF dynamo field DF1 dynamo field 1 DF2