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All electrical relays consist of two circuits.
1.. A control circuit that utilizes a control voltage with a minimum current to
switch a
2.. Power circuit requiring much greater current.
The advantage of using this type of circuitry is that the switches or sensors that control large loads can be very small, {i.e. pilot switches, limit switches, sensors, etc.}, since they are the control switching device that can be capable of switching loads up to 600 amperes. This arrangement allows a very small wire size for controlling large loads.
Without the use of relays, switches that control larger loads would be very expensive and occupy much more space.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoIt's basically a switch that is actuated magnetically. Current flowing through the control circuit energizes an electromagnet, which toggles the switch.
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