Category: How It Works

Control Relays – HOW THEY WORK & WHAT THEY’RE FOR

A relay is a type of electromagnetic switch, similar to a contactor, that can be controlled remotely with electricity, rather than needing manual input as a standard switch would. CONTROL RELAYS Relays can be used to control normal loads, as a contactor would, however the benefit of a relay is they come with multiple...

TRANSFORMERS – What They Are, How They Work, How To Size Them

Let’s open up a transformer and dig through it to see how they work. Transformers are extremely useful devices used in electrical systems to raise and lower voltage. They’re also used for isolation, typically in cleaning up power. They only exist in the world of Alternating Current however, so in DC circuits you won’t...

Automatic Circuits (Contactors, Relays, Photocells & Timeclocks)

Automatic circuits work on the philosophy that some external/automatic switch turns power on and off to a circuit.  This can be a photocell or timeclock that controls a set of relays or contactors which allow or disallow current to flow in a circuit. A photocell takes in light from a photovoltaic eye, and opens/closes...

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