In a time-delay relay, which component is responsible for delaying the action?

• A. Coil
• B. Timing mechanism
• C. Alarm
• D. Contacts

Answer: (B)

The timing mechanism is what creates the pause between energizing the coil and the actual switching action. When power reaches the coil, the timing mechanism starts counting. After the preset delay, it changes the state of the contacts to either open or close, depending on whether it’s an on-delay or off-delay type. The coil provides the magnetic force to move the contacts, but it does not determine how long the delay lasts. The alarm is just an indicator, not the delaying element, and the contacts are the switching path that the timer ultimately controls. The timing mechanism can be a mechanical timer, a digital timer, or an electronic timing circuit.