Latching Relay Basics - Basic working principle in 2 minutes

The video explains the function and benefits of latching relays in electrical circuits. It begins with a description of how electromagnetic relays work, resetting when de-energized. The need for latching relays is highlighted using an elevator call button example, where the light remains on to indicate the elevator's arrival. The video details the design of latching relays, consisting of three circuits and a piston. It describes the operation of these relays in an elevator system, emphasizing their ability to maintain position without continuous power. Finally, the video outlines the benefits of latching relays, such as positional memory and efficiency.

What is the primary function of a latching relay in an elevator system?

• To ensure the elevator doors close properly

• To keep the elevator light on after the call button is pressed

• To control the speed of the elevator

• To provide power to the elevator motor

Which of the following is NOT a component of the simplified latching relay system described?

• Call button circuit

• Battery backup

• Reset circuit

• Lamp circuit

How does the piston in the latching relay system maintain the circuit?

• By using a hydraulic system

• By being spring-loaded

• By staying in position without a spring

• By rotating continuously

What happens when the elevator reaches the lower floor in the latching relay system?

• The elevator doors open

• The piston is pushed further in

• The lamp turns off automatically

• The call button is reactivated

What is the advantage of the positional memory feature in latching relays?

• It allows the relay to reset automatically

• It reduces the need for continuous power

• It enhances the durability of the relay

• It increases the speed of the relay