Low- woltage devices as seiches, relay, fuses, curcuit breakers, surge protection device ,power contractors and switches
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Differential relays take a variety of forms, depending on the equipment they protect. The definition of such a relay is “one that operates when the vector difference of two or more similar electrical quantities exceeds a predetermined amount. It will be seen later that almost any type of relay, when connected in a certain way, can be made to operate as a differential relay. In other words, it is not so much the relay construction as the way the relay is connected in a circuit that makes it a…

If you are adding an extension, installing an air conditioner or anything else that will contribute towards a large change in your energy consumption, you may need your mains supply upgraded in order for it to cope with this new load.