Lunite FH4540Z

[Sittard]

Hello All

I would like to ask you for advice. I’ve got the Lunite single phase compressor equipped with terminal box with the 63Amps contactor. I would like to know if that contactor is sufficient to do the job.

This is the electric specification:
Rated Current RLA: 20A
Max Current: 30A
Start Current: 100A

That starting current makes me a bit anxious.

Many Thanks,
Sittard

[chemi-cool]

No problem.

Your 63amp contactor is sufficient to do the job.

What you have to look at, is the MAX CURRANT.

At start the contacts are closed and it takes less than a second for the compressor to run and drop the amps.

When you disconnect the contactor at high currant, there is a big spark between the contacts and that is what kills contactors.

[coolhibby1875]

i have seen 10 hp 3 phase compressors on 32 amp contactors, your little pot will be fine!

[coolhibby1875]

http://www.actrol.com.au/PriceGuide/Actrol_Technical_Resource_&_Price_Guide_July_2009_Section_4.pdf

according to the above link fla are 7 amps

[monkey spanners]

Many contactors have the max motor hp/kw marked on them or on a chart on the box come in. I think your compressor is a 3hp model.