What is a multifunction timer relay?
1. Multifunctional Timer Relay description. Multifunctional Timer delay module is a revolutionary circuit with many commonly used timer delay functions. It is perfect for many applications from hobby to industrial controls.
What is timer relay?
A Timer Relay is a combination of an electromechanical output relay and a control circuit. The contacts will open or close before or after a pre-selected, timed interval.
What is the difference between timer and relay?
Relays are switches that open and close circuits electromechanically or electronically. Timers control timing in applications where functions need to be delayed or loads need to be maintained for a predetermined period.
How does delay timer work?
With ON-delay operation, the Timer receives an input and then an output signal is output by switching the Timer contacts after a set time delay. This name is used because there is a delay between when the input signal is received (i.e., turns ON) and when the output signal is output.
How do I test a timer relay?
Burden Test
- Adjust the timer with high time delay for example: 2 minutes.
- Energize the relay with 125V and measure the dc current.
- Note down the current before timer operates.
- After 2 minutes relay will pick up. Note down the current after operation.
- Calculate the relay power (W) = 125v x measured current.
What are the two basic classifications of timers?
Timers can be classified as on-delay or off-delay.
How does a delay on make timer work?
HOW IT WORKS: Immediately upon application of power, the Delay on Break timer enables circuit operation. Once power is interrupted, the circuit opens for the time set on the dial. After the time period elapses, the circuit closes, allowing the protected motor or compressor to start.
Where are timing relay used?
Timing Relays are used extensively in industrial applications, HVAC systems and building services to provide time-delayed switching. For example to start a motor, control an electrical load, or simply automate an action. They play a vital role for targeted logic needs.
What kind of timing relay should I use?
Their narrower design makes the 7PV15 timing relays particularly suitable for use in heating, ventilation and air-conditioning systems and compressors. All 7PV15 timing relays in this enclosure version are suitable for snap-on mounting onto TH 35 standard mounting rails according to IEC 60175.
How big is the Sirius 3rp25 timing relay?
The SIRIUS 3RP25 timing relays are available for all conventional applications in an industry-standard width of 22.5 mm or space-saving 17.5 mm. Up to 27 functions are integrated in the multifunctional timing relay – with a uniform wide voltage range of 12 to 240 V AC/DC.
How is a varistor integrated in a timing relay?
A varistor is integrated in the time-delay auxiliary switch to attenuate contactor coil switching overvoltages. With the new simulator for the SIRIUS 3RP25 timing relays, the sequence of different timing functions can be visualized and a variety of fault cases can be simulated.