Hoe werkt een relais? - Opencircuit (2024)

FAQs

How does a relay work? ›

Relay consists of a coil, which receives an electric signal and converts it to a mechanical action and contacts that open and close the electric circuit.

While a relay does add an extra step to the switching process, the main advantage is that you can leave the actual switching of high-power circuits for things like off-road lights or air compressors in the engine compartment, and control that switching with a much smaller amperage circuit that energizes the relay's ...

A bad main relay can cause problems like a no-start condition, unreliable vehicle ignition, an engine that won't stay running, and an illuminated check engine light. Relays are electronically-controlled switches. They connect or break paths in a circuit to control electric currents and their respective devices.

Relays are much more versatile than switches as they can handle different complex systems. From homes and electronics to various industries, relays can come in handy to assist in handling larger circuits.

Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal.

Relays, on the other hand, are more complex and expensive, but they can be used multiple times, provide faster response time, and can be controlled with electricity to open or close the circuit.

It is actually an "automatic switch" that uses a smaller current to control a larger current. Relay plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.

When you activate the relay by applying an appropriate voltage to the control circuit, the electromagnetic coil in the relay activates and pulls the switch open, stopping any current flowing through the switched circuit.

Generally, a power relay gets power from the battery source, and the electromagnet draws the armature. Also, it includes a moveable arm made of iron. It uses a spring to hold the armature in place. The armature gets pulled to the coil directly to reach contact and close the circuit.

The heart of a relay is an electromagnet (a coil of wire that becomes a temporary magnet when electricity flows through it). Think of a relay as a kind of electric lever: switch it on with a tiny current and it switches on (“leverages”) another appliance using a much bigger current.