Electrical relay symbol on schematics. This page contains information on the megasquirt relaypower distribution board for the megasquirt efi system. The presentation of the interconnections between circuit components in. Many converts to autocad electrical are coming from the plain autocad environment so there drawings usually consist of simple lines and text to represent wires and wire numbers and simple blocks to represent schematic symbols. Electrical library complies with ansi y322 and iec617 and fluid power library complies with iso1219.
Control relay tutorial how a relay works. The small number 28 in the right hand margin tells you the line location of the contacts associated with relay coil ifr. How to use house electrical plan software electrical plan is a document that is developed during the first stage of the building design. A good trade school program will cover electrical schematics but blueprints arent in the curriculum for most hvac programs and neither are covered in most licensing exams.
Most of those errors have been corrected here. This allows the mounting of the megasquirt ecu in the passenger compartment which keeps the ecu from experiencing the severe under hood. On the originals the third pin is used to flash the dash repeaters via additional contacts in the indicator switch whereas on electronic units the third pin is connected to earth. An octal base relay like the one shown below is one of the most common electrical devices in use today.
Electrical blocks library and fluid power blocks library for autocad. The relaypower board is designed to be installed in the engine compartment and interconnected to the megasquirt ecu using a remote cable. Fuse relay panel. However its wise to verify your relays using the relay part numbers listed below especially for the 1980 1982 carsthe fuserelay panel is located under the dash drivers side behind the kneebar.
A circuit diagram electrical diagram elementary diagram electronic schematic is a graphical representation of an electrical circuita pictorial circuit diagram uses simple images of components while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations. This scheme is composed of conventional images or symbols of components that operate by means of electric energy. The bentley service manual has numerous errors in its list for relays and fuses.