3 phase element connection

[garagerob]

can anyone help?
I replaced a three phase element/immersion, like for like, the new one is now not pulling any current.
Found the neutral is not connected in the isolator enclosure, so i only have the three phases connected at the appliance.
Can i get the element to work without a neutral?

 

[RF Lighting]

The old one must have done. This is normal for balanced 3 phase loads.

Are you sure it was the element that was previously faulty, or could it be a stat or supply problem?

 

[333rocky333]

Seen it done here, but it is more common abroad, manufacturers here tend to fit the neutral as without it problems arise when one element fails

 

[333rocky333]

The stat is usually connected to a triple pole contacter, we have found when the element goes as there is 400 volt it sometimes blows the contacts in it to bits.

 

[garagerob]

definately the element bust, big burst in one of the legs, continually tripping it out.
i thought there was a link pattern for the terminals at the element like star or delta with links etc but cant remember!

 

[garagerob]

fitted new contactor too..

 

[333rocky333]

sometimes like this

http://www.mid-com.co.uk/Downloads/01.pdf

 

[garagerob]

spot on! i'll get back and check it out again.

thanks