Types of Relay

A Woman’s Guide to Identifying Different Types of Relay

Women these days are independent and able thanks to the society’s empowerment. Whatever you put in their way, women will thrive even if it means tacking electrical works. Who says that a woman cannot handle electrical works? Schools these days integrate basic electrical works in their curriculum. Women need not worry.

This article will discuss the basics of relays. A relays is essentially a switch that is electrically operated. The earliest application of a relay can be traced back to the age of telegraphs. Long distance telegraphs use a relay as amplifiers. A simple one involves a curl of wire covered around a solenoid, iron yoke, iron armature, and contacts.

mercury relay

It is time to know the different types of relay. Here’s the list:

Coaxial relay

In the case of receivers and radio transmitters, a coaxial relay is used. Receivers and radio transmitters usually share the same antenna. Coaxial relay shields the receiver from the excessive transmitter power.


Contactors are famous for industrial works because it is heavy-duty. Additionally, it has higher ratings for current. The current ratings of contactors range from 10 amps to more than a hundred. You have to know that contactors have different forms. Contactors are not designed to interfere short circuit, unlike circuit breaker. The thing about contactors is that it is noisy.

Latching relay

Latching relay can also be called impulse or star relay. This relay is designed to sustain contact position without power in the coil. A latching relay controls a building’s lighting without the unnecessary hum.

Mercury relay

As the name suggests, mercury relay considers mercury as its switching component. A mercury relay can be applied when contact erosion is a setback. However, this type of relay is uncommon because of environmental concerns.

Overload protection relay

Sometimes overloading happens and when it hits, it can damage not only the motor but the circuits as well. This is the reason why overload protection relay is very important. This relay will avert destruction caused by overloading. Additionally, it can handle short circuits and other internal faults.

Polarized relay

The polarized relay was first seen in the middle of the 20th century. During this time, it is used to spot weak rhythms of telephone exchanges and correct the distortion of the telegraph. In this kind of relay, the armature is positioned between the poles of a magnet thereby increasing its sensitivity.

Safety relay

A safety relay, as the name suggests, is a tool that has the power to put in place safety functions. In the event of peril, safety relay will use suitable measures to diminish the existing risk.

The list is extensive. For the meantime, focus on learning few types of relay before moving to other electrical works. When undertaking electrical works, it is crucial that you observe safety precautions, as it is dangerous. Remember to plug all the switches and neatly tuck it away so babies and pets cannot touch it. Most importantly, keep away any electrical things from the water. If you have a baby around, cover reachable outlets with safety caps. The safety of the people around is in your hands. Be smart.