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Anonymous Poster

Armour

10/23/2008 9:46 AM

I saw that 2 different types of armour used on LV cable according to the cable types i.e,multicore had GSWA and single core had AWA.so,what is the difference between the Gaslvanised steel wire armour(GSWA) and Aluminiun wire armour(AWA)?
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SAK
Commentator
Engineering Fields - Power Engineering - Projects Engineer

Join Date: Aug 2008
Location: Tanzania- East Africa
Posts: 71
#1

Re: Armour

10/25/2008 5:20 AM

Grade of armouring .

steel will provide higher grade of protection.

Alu is soft and easier for installation for single wires.

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Anonymous Poster
#2

Re: Armour

10/30/2008 1:25 AM

Galvanised steel is an insulating metal and will give more strength to cable.....where as aluminium armour is conducting metal....
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SAK
Commentator
Engineering Fields - Power Engineering - Projects Engineer

Join Date: Aug 2008
Location: Tanzania- East Africa
Posts: 71
#3
In reply to #2

Re: Armour

10/30/2008 3:43 AM

Galvanised steel is an insulating metal !!?

Please be careful do you mean galvanised steel is an insulator.

we have been using the galvanised steel of armoured cables as grounding .

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 A wise person will understand more from a Foolish question than what a Fool will understand from a Wise Answer
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Anonymous Poster
#4

Re: Armour

12/28/2009 6:21 AM

1C cables should have non-magnetic armour material to avoid eddy current loss in it, so aluminum armour is used, Whereas in case of 3C cables, flux linking armour will be zero because of all 3 ph current flux sum is zero at any instance, there we can use steel armour to have good protection against mecanical damage.
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gova1467
Commentator
India - Member - New Member

Join Date: Nov 2008
Location: India
Posts: 72
#5
In reply to #4

Re: Armour

10/28/2010 6:52 AM

Dear sir

My understanding.

Please correct me if wrong.

Even in 3 core cables,when the load is unbalanced,there may be armour current and hence armour losses.Hence it is advisable for three core cables also to balance the load current in all the three phases to eliminate armour losses in the armour and eddy current losses in the cable support system.

Thanks in avance

Regards

gova1467
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