Time Delay Relays
Time delay relays are simply control relays with a time delay built in. Their purpose is to control an event based on time. The difference between relays and time delay relays is when the output contacts open & close - on a control relay, it happens when voltage is applied and removed from the coil; on time delay relays, contacts can open or close before or after some time delay.
Timing relays are arranged for an intentional delay in operating their contacts
