Earth Circuit Symbol

Digital common ground.

Earth circuit symbol. It detects small stray voltages on the metal enclosures of electrical equipment and interrupts the circuit if a dangerous voltage is detected. An elcb is a specific type of latching relay that has a structure s incoming mains power associated through its switching contacts so that the circuit breaker detaches the power in an unsafe condition the elcb notices fault currents of human or animal to the earth wire in the connection it guards. To identify an earth ground terminal in cases where neither the symbol 5018 nor 5019 is explicitly stated. An earth leakage circuit breaker elcb is a safety device used in electrical installations with high earth impedance to prevent shock.

Connected to the chassis of the circuit. In electrical engineering ground or earth is the reference point in an electrical circuit from which voltages are measured a common return path for electric current or a direct physical connection to the earth. Here are the precise iec definitions for each symbol. The earth ground symbol is unfortunately used in many applications in electronics and electrical engineering often meaning different things to different people so it may be a bit confusing to some beginners.

To see how the current flows in a circuit diagram with ground symbols just connect all the points that have ground symbols. For instance the earth ground symbol is also used as a common ground symbol or a 0v reference. The cable side earth switch is interlocked with the circuit breaker and can only be closed when the circuit breaker is in the drawn out position. Whether you are a novice or a professional engineer these basic symbols can help create accurate circuit diagrams in minutes.

That is what you do when you build the circuit. Used for zero potential reference and electrical shock protection. Electrical ground symbols of circuit diagram earth ground chassis ground digital ground. Even if there is no earth or chassis connection it is common to refer to one point or voltage in the circuit as ground.

It also eliminates some wiring and un clutters the schematic. The actual symbols used to indicate ground terminals are found in iec 60417 graphical symbols for use on equipment figure 1. Basic electrical symbols contain earth electrode cell battery resistor etc. The withdrawable circuit breaker provides load switching short circuit protection and circuit isolation when opened and in the draw out position.

Electrical circuits may be connected to ground earth for several reasons. Use of the ground symbol gives instant visualisation of the grounded points on the circuit. The ground symbols indicate the generic reference point. Flow of current when the ground symbol is shown.

Exposed metal parts of electrical equipment are connected to ground so that failures of internal. An example circuit using ground symbols.