Selecting the right relay for the job…Between relay manufacturers with the type and characteristics – can one take for granted the relays will be able to do the same job.
If you bought a cheap relay, make sure you install and use it correctly…otherwise you can kiss it goodbye in a short while…
Bought a good quality relay…make sure you get your value for money back…
For instance- With a good relay you can even drive a motor…just be careful!
FYI: Relays are normally rated and intended for RESISTIVE LOADS (AC1) and driving loads like solenoids , motors and transformers one has to derate it according to the “powerfactor”…and this is by quite a big factor.
And do not forget to put that flyback diode in there – it will increase the life span of that relay tremendously (for DC loads that is).
Note to self: It would be nice to get feedback on manufacturers if this inductive derating is affected when the load is only switched on once a day compared to 30 times an hour. After all, it is the switching that kills the contacts and not the “on time”. gs
For a more technical discussion check below:
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