mamech
Full Member level 3
Hello
I want to select a relay to drive an air conditioning unit that is single phase and with power about 4.5 Hp . According to calculations, a 30 A rated relay will be enough, but my question is: will it really be enough?
I know that Ac machines has starting current that reaches up to 5~7 times the rated current. I do not know what is the relation between rated and maximum currents of relay because this is not explicitly mentioned in datasheet.
I am about to choose this one:
https://www.farnell.com/datasheets/1717914.pdf
In fuses, I heard that a rule of thumb is that the maximum current is about 10 times the rated current, does the same rule works with relays?
I want to select a relay to drive an air conditioning unit that is single phase and with power about 4.5 Hp . According to calculations, a 30 A rated relay will be enough, but my question is: will it really be enough?
I know that Ac machines has starting current that reaches up to 5~7 times the rated current. I do not know what is the relation between rated and maximum currents of relay because this is not explicitly mentioned in datasheet.
I am about to choose this one:
https://www.farnell.com/datasheets/1717914.pdf
In fuses, I heard that a rule of thumb is that the maximum current is about 10 times the rated current, does the same rule works with relays?