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On-Off switch using 2 relays – Four versions

On-Off switch using 2 relays – Four versions The load wired to output of such device is connected and disconnected by each momentarily pressing on a pushbutton. The arrangement haves a toggle flip-flop function, or toggle bistable. The three versions are presented, based on the momentary pushbutton respectively single normally-open, SPDT and DPDT type. If…

03/11/2006

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On-Off switch using 3 relays – Fifteen versions

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On-Off switch using 3 relays – Fifteen versions ! Since the electrical standards adopted by various nations may vary, the graphical schematic/wiring diagram simbols can also vary (example: DIN, NEMA, IEC, EEMAC, CENELEC). This article uses International/British graphical simbols. For unambiguity, the used simbols are described in the following table: A relay control system is…

03/11/2006

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