Transformers

What is a Transformer?

A transformer is a device that takes a given input voltage and changes it to a different output voltage. This can be an increase or a decrease in the amount of voltage, which in turn, can affect the speed of the electrical current.

Why is the Transformer Important?

Electricity needs to be transported at high voltages to reach its required places. Taking electricity in this form will, however, result in dangerous overloads. As such, transformers are used to lower the electricity’s voltage so that it is safe to use.

How Does a Transformer Work?

A transformer uses electromagnetic induction to increase or decrease an electrical current’s voltage. This is achieved by wrapping two wire conductors into coils, with one being longer (having more loops in the coil) and the other shorter (having fewer loops in the coil). As the longer coil is electrified, a current will be induced in the shorter coil at a lower voltage than is present in the first coil.

What is the Symbol of a Transformer?

A transformer schematic symbol is a graphical representation of the device. It provides a simple, visual indicator of the transformer’s position on the circuit diagram without the need for a physical inspection.

What Does an Electrical Transformer Symbol Look Like?

A typical electrical transformer symbol may look like two coils (called windings) placed next to each other, with the magnetic coupling and orientation between these two coils being indicated in the image. Some coil symbols may also be labeled with letters and/or numbers to indicate their electrical connections or dots to indicate polarity.

Many transformer electrical symbols use the dot convention marking. In this case, dots indicate the winding direction between input and output and, therefore, the polarity between windings.

Types of Transformer Symbols

There are many different standard transformer configurations, each with its own transformer schematic symbol. Below are some examples:

Auto Transformer Symbol

An auto transformer utilizes a single winding for both the primary and secondary circuits, unlike traditional transformers, which have separate windings. This single winding is tapped at different points to adjust the output voltage.

Current Transformer Symbol

A current transformer measures alternating current (AC) by converting a high current into a lower, manageable current. It is commonly used in power systems for applications like metering, protection, and monitoring, making it possible to measure high currents safely and accurately.

Electrical Drawings Made Easy With Capital X Panel Designer!

With so many different transformer symbols out there, it can be difficult to remember and draw them all. Fortunately, Capital X Panel Designer lets you skip the tedious drawing process by providing you an extensive library of pre-made transformer schematic symbols for your perusal. Just find the one you need and drag and drop it into your electrical drawing. You’ll find your productivity skyrocketing with this electrical CAD software in your arsenal.

Learn more about how to create your own electrical symbols.