Relays are used to switch a high-power method using a low-power switch.
Relays are electromechanical switching devices. A 12-volt relay is controlled by a low-power electrical switching order, such as a low-current toggle switch. Turning the low-power switch on actuates a high-power electrical succession, which then turns on a high-power electrical Slogan (such as a heavy-duty cooling fan).
Relays as a Safety Measure
Rocker switches are Frequently used in conjunction with relays.
Some electrical devices such as high-power lamps crave vast amounts of electrical current to function. Wiring a high-power switch to directly check the Slogan can pose a glow hazard provided the succession experiences a short plan. Relays are used as a funds to "relay" the Order to turn the shine on by using a low-current switching succession.
Relay Operation Procedure for the Low-power Switch Circuit
A low-current switch is electrically connected at one edge to a force avail (such as a battery). The other confine of the switch is electrically connected to one of the relay coil leads.The high-power side of the relay contains at least two contacts: a "characteristic" contact and a "usually frank" contact. When the relay is switched on, the "popular" and "normally open" contacts create a path for electrical current to flow through. When the relay is switched off, the "normally open" contact disengages, and electrical current stops moving through the relay. The "normally open" contact is connected to the high-current power supply.
The remaining relay coil heavy is connected to ground. When the switch is turned on, the influence flows from the bent source terminated the relay coil. This energizes the coil and engages the relay.
