What is the IEC standard for electrical symbols?

What is the IEC standard for electrical symbols?

IEC 60617
Standards for symbols The graphic symbols used for electrical components in circuit diagrams are covered by national and international standards, in particular: IEC 60617 (also known as British Standard BS 3939). There is also IEC 61131-3 – for ladder-logic symbols.

What is bs3939?

BS 3939 has been issued in 29 parts at various times between 1966 and 1979. It deals with symbols for electrical and electronic components and assemblies and their use in various kinds of diagram, including circuit diagrams and block diagrams.

What IEC 617?

IEC 60617 contains graphical symbols for use in electrotechnical diagrams. All the parts (Ed. 2 or 3) of the previously published IEC 60617 have been incorporated into this database that currently includes some 1900 symbols. The database is the official source of IEC 60617.

What is a 3 line diagram?

Three-line diagrams expand on the single-line by providing a basic visual guide for actual feeder cabling, instrument transformer connections, and protective devices. These drawings show how phases are wired and specific winding configurations without regard for their physical location.

Why is a relay called K?

Countries using American standards use IEEE Std 315-1975 / ANSI Y32. 2, Graphic symbols for electrical and electronic diagrams. Relays are called ‘K’ because IEC 60750 and IEEE 315 say so. This is a rare case of European standards agreeing with American standards!

What does R mean on a circuit board?

IEEE 315 contains a list of Class Designation Letters to use for electrical and electronic assemblies. For example, the letter R is a reference prefix for the resistors of an assembly, C for capacitors, K for relays.

What is Rio panel?

Programmable Logic Controller (PLC) & Remote Input/Output Control Panels. PLC and RIO control panels can be designed for multiple arrangements of digital and analogue I/O.

What is K in a circuit?

K for relays and contactors. V for tubes and semiconductors. (Consider “V” for “vacuum tube”.) Q for “switching devices for power circuits”, i.e. circuit breakers.

What is M in wiring diagram?

Motor. A motor, shown as a circle with the letter M inside it, changes electricity into movement.