Hager Low noise contactors

[ed-ectrician]

A client has a bloody loud (solenoid clicks and also a progressively high whining sound which makes it sound as if it's about to go off pop!) hager contactor switching his underfloor heating (primary heat source for whole flat - all on one stat - do what?!) It is a 40a 3NO contactor. ES 340 is the model.

I looked online for low noise hager ones and I found the following (Hager 2 Module 4NO Contactor 20A 230V 50Hz, ESN420)

This one is 4 Normally open instead of 3 - dont see why this should pose a problem. Just use 3 of the four poles right? Or am I being thick. Havent used contactors much and college is a fairy distant memory now - "you dont use it you dont remember it" - it is a single phase load.

Has anyone used these before? Do they really work in keeping noise down?

Thanks

Ed

 

[Brightspark2]

Contactor shouldn't be that loud...

Ive used the Hager ones, they are quiet, if I remember rightly lol...

Just use 3 poles yes...

 

[Knobhead]

Contactors like anything else mechanical wear and do get noisy. Go in to an old switch room with 200+ contactors and it gets very noisy.
As you say just use three of the four contacts and you'll be fine.

 

[Engineer54]

Gone are the day's when contactors were totally serviceable, with literary every part/component replaceable. Now if contacts become burned, spring become weak, coil open or burned, they tend to be throw away jobs!! lol!!

 

[Knobhead]

Mores the pity.

 

[Engineer54]

Here Here!! lol!!

 

[ed-ectrician]

Thanks all, sounds like it's old and tired. When things get old and tired they complain more I suppose... (is that how this forum keeps going?!?!)

I'm replacing and I may as well try a low noise one. I'll let you know how i get on.

Thanks all

Ed