Electrical Symbols For Electrical Schematic Diagrams
Electrical symbols virtually represent the components of electrical and electronic circuits. This article shows many of the frequently used electrical symbols for drawing electrical diagrams. Though these standard symbols are simplified，the function descriptions can make you understand clearly.
Below lists the most commonly used electrical and electronic symbols that can help you get started quickly.
|Name||Electrical Symbol||Alternate Symbol||Description|
|ground/earth||This symbol identifies an earth(ground) terminal used for a zero potential reference point and electrical shock protection.|
|equipotential||It is a symbol to identify parts with the same voltage (i.e., the same electrical potential or equipotential). Since equipotential surfaces all have the same voltage, you won't be shocked if you touch two such surfaces unless you are also touching another part with a different potential from the first two parts.|
|chassis ground||It is a link between different metallic parts of a machine to ensure an electrical connection between them. It must not be considered as a link to the earth.|
|battery||It is a device that consists of one or more electrochemical cells with external connections to empower electrical devices and generates constant voltages.|
|resistor||It is an electrical component that reduces the electric current, for example, to limit the current passing through an LED. A resistor is used with a capacitor in a timing circuit.|
|attenuator||It is an electronic device that reduces the power of a signal with appreciably distorting its waveform, which is the opposite of an amplifier.|
|capacitor||It is a device with two terminals, which stores electric energy. The effect of a capacitor is known as capacitance. It can also be used as a filter to block DC signals but pass AC signals.|
|accumulator||It is an energy storage device that accepts, stores, and releases energy, increasing or relieving pressure in the system.|
|antenna||An antenna also knows as an aerial, is a device designed to transmit or receive electromagnetic (e.g., TV or radio) waves.|
|loop antenna||A loop antenna is a radio antenna consisting of a loop (or loops) of wire, tubing, or other electrical conductors with its ends connected to a balanced transmission line.|
|crystal||A crystal oscillator uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with an exact frequency.|
|circuit breaker||A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.|
|fuse||A fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit.|
|ideal source||An ideal voltage source is a two-terminal device that maintains a fixed voltage drop across its terminals. It is often used in the simplified analysis process of a real electric circuit.|
|transducer||A transducer is a device that converts energy from one form to another. Usually, a transducer converts a signal in one type of power to a signal in another.|
|inductor||A coil of wire creates a magnetic field when current passes through it. It may have an iron core inside the coil. It can be used as a transducer converting electrical energy to mechanical energy by pulling on something. It is a passive two-terminal electrical component used to store energy in a magnetic field.|
|explosive squib||Explosive squib is often used on stage and film to trigger various special effects.|
|sensing link squib|
|Surge protectors protect your electronics from power surges in your electrical system.|
|instrument||For example, a voltmeter is an instrument used for measuring the electrical potential difference between two points in an electric circuit. The wattmeter is an instrument for measuring the electric power in watts of any given circuit.|
|delay element||The delay element provides a specified delay between the actuation of the propellant-actuated devices.|
|permanent magnet||A permanent magnet is a material or object that produces a magnetic field.|
|bell||The electric bell is found in an ordinary house doorbell, and when activated, it makes a ringing sound.|
|buzzer||An electrical buzzer is similar to the bell that makes a constant buzz noise instead of a single tone or bell sound.|
|lamp||A transducer converts electrical energy to light, used for a lamp providing illumination, for example, a car headlamp or torch bulb.|
|speaker||A speaker can take digital input and turn it into analog sound waves—one of the most important parts of a wide range of electrical products like TVs and telephones.|
|oscillator||It produces a repetitive electronic signal, often a sine wave or a square wave.|
|AC source||Alternating Current, continually change direction.|
|DC source||Direct Current, always flow in one direction.|
Each electrical component may have several representations as the electrical symbols can vary from country to country nowadays. Some electrical symbols become virtually extinct with the development of new technologies. In cases where there is more than one universal electrical symbol, we have tried to give an alternate representation.
It is easy for you to create an electrical diagram when you know where to find thousands of electrical symbols. You can watch the video below and learn how to create an electrical circuit diagram. Alternatively, you can follow the instructions of words and pictures step by step.
Step 1: Launch EdrawMax on your computer. An extensive collection of electrical diagram templates can be found in the Electrical Engineering category. Click the icon of Basic Electrical to open the library that includes all symbols for making electrical diagrams.
Step 2.1: As you are into the workspace of EdrawMax, drag the symbol that you need directly onto the canvas. You can resize the selected symbol by dragging the selection handles. A double-sided arrow shows the direction to which you can move the mouse, and you can only move the symbol when a four-direction arrow appears.
Step 2.2: You can also change the shape of the symbol via the floating menu/action button. It shows when the symbol is selected or when the pointer is over the symbol. For example, the resistor can have 12 kinds of variations.
Step 3: When your electrical diagram is complete, you can export it to JPG, PNG, SVG, PDF, Microsoft Word, Excel, PowerPoint, Visio, HTML with just a single click. So you can share your drawings with people who don't use EdrawMax with no need to looking for ways of converting file formats.