How does a relay with time delay functions work? Leave a comment
What types of relays are produced?
What is the difference between On Delay, Off Delay, Single Shot, Interval On and all these other time delay functions? How does a time delay relay work?
Solution :
Understanding the all differences between all the timing relay functions available in time delay relays can sometimes be a daunting task. When designing circuits using time delay relays, questions such as what initiates a delay relay, does the timing start with the application or release of voltage, when is the output relay energized, etc., must be asked.
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, the contacts can open or close before or after some time delay.
Typically, timer relays are initiated or triggered by one of two methods:
– application of input voltage
– opening or closing of a trigger signal
