MV cable Armour and Shield grounding connection

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vinod

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Team,
I have 3x300mm2 15KV rated armoured cable with shielded cores.
Can I connect the Armour and Shield tougher to ground?
If can't why? Which one will be the appropriate connection to ground, armour or shield?
 
vinod said:
Team,
I have 3x300mm2 15KV rated armoured cable with shielded cores.
Can I connect the Armour and Shield tougher to ground?
If can't why? Which one will be the appropriate connection to ground, armour or shield?
Click to expand...

I think nobody got my question...There was a dispute about the captive transformer(30MVA) secondary cable terminations, which is supply 11KV to the induction motor(13MW). The terminator have connected the core shield and cable armour into the same ground point. But one of our engineer saying that, there should not be TWO path for the fault current. So the shield should be disconnected and floting.

Which is correct? help me....
 
Who is the manufacturer? Can you contact the cable manufacturer and ask them what should be bonded together? I looked up an okonite cable that I think is like what you described, but I do not know if the shield should be bonded to the armour and equipment grounding conductors. I don't know how this would physically be done either.:-?
 
There are always two paths when you install a shielded cable and an EGC. The shield is for stress relief and the EGC for clearing the fault.
 
don_resqcapt19 said:
There are always two paths when you install a shielded cable and an EGC. The shield is for stress relief and the EGC for clearing the fault.
Click to expand...

So your opinion is that, shield and EGC should be connected to the earth. Am I correct?
 
vinod said:
So your opinion is that, shield and EGC should be connected to the earth. Am I correct?
Click to expand...

That is how most of the installations I have seen have been installed.
 
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