Fundamentals of Timer Relays


In large industrial settings, it is hard to keep an eye on what is happening with every electronic device on the floor. The same applies to household appliances that require electricity for many hours during the day. A good example is your refrigerator, which requires an automated system to regulate the voltage use because it needs to be running most of the time. This is where timer relays come in handy, and there is a host of them in the market to cater for your specific needs. Here are some of the fundamentals that you need to know about timer relays:

Interval-on-Operate Timer Relays

An interval-on-operate timer relay begins timing when you apply voltage to the coil and cause the contacts to transfer. When the timing interval lapses, the contacts transfer and cut off the voltage supply. You must switch on power again restart the timer relay.

On-Delay Timer Relays

An on-delay timer relay works in such a manner that the timing of the voltage cycle begins immediately you apply the voltage through the circuit. When the set time elapses, the circuit contacts close and stay closed until no more voltage passes through the coil. If you cut off the voltage supply before the period on the timer lapses, then the timer relay automatically resets itself.

Off-Delay Timers

An off-delay timer has a slightly different working mechanism compared to that of an on-delay timer. When you apply voltage through the circuit, nothing happens to the timer. However, the contacts transfer when you close the control input. When you open the control input, the timer starts running and the contacts in the circuit stay closed. They will transfer when the set time runs put.

Unlike the on-delay timer relays where voltage cut off causes the timer to reset, this function has been transferred to the control input in the off-delay timers. If you close the control input before the set time elapses, then the timer will reset. On the other hand, cutting off the voltage supply opens the contacts and resets the timer at the same time.

Flasher Timer Relays

Flasher timer relays are the go-to option when you need repetitive action from an electronic device over a long period. Whenever you supply voltage to the circuit, there is repeated energisation and de-energisation of the contacts in the circuit with equal on and off cycle periods. Here, removing the voltage stops the timing action and the cycle will begin all over again when you introduce voltage.


6 April 2017

Investing in New Industrial Equipment

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