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needtoknow
Active Contributor

Join Date: Nov 2009
Posts: 12

Induced Voltage

05/15/2011 7:37 AM

Hi friends,

if some one can explain how to calculate the induced voltage for 132 kv cables as the cable supplier is asking me to do this calculation details are hereinafter::

132 kv,1c,cu,1200mm2 cross section,lead sheath,xlpe, each three cables to be laid together,,,,,,,please advise
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nairck
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Join Date: Apr 2011
Location: Located in INDIA.Kerala state,kottayam Dt,pala.
Posts: 42
#1

Re: induced voltage

05/15/2011 8:13 AM

The lead sheathed cable is free of induced voltage on other parallel run cable.The leadsheath contain the capacitance and magnetically induced voltages. By earthing the sheathing the the induced voltage diminishes.

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 Lalithambika
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needtoknow
Active Contributor

Join Date: Nov 2009
Posts: 12
#2
In reply to #1

Re: induced voltage

05/15/2011 9:28 AM

thanks indeed Mr.Nairck,

Thats ok,as you said the sheath will be earthed with the earth link box ,but why do you think the supplier asked me to do the induced voltage calculation?and what is the formula in details if possable.

regards
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3
In reply to #2

Re: induced voltage

05/16/2011 4:41 AM

Ask the individual who wants the calculation the question "why".

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LAA_Lucke
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Join Date: Feb 2010
Posts: 1013
Good Answers: 36
#4
In reply to #1

Re: induced voltage

05/16/2011 9:32 AM

There will be a Voltage field and a magnetic field.

The magnetic field will pass through the lead sheath and induce a current / Voltage in the other cables (lead shields included.

To calculate all these interactions ??? must find the litterature! I did not do this in details.
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needtoknow
Active Contributor

Join Date: Nov 2009
Posts: 12
#6
In reply to #4

Re: induced voltage

05/18/2011 7:46 AM

Thank you,,,,,AA Lucke,

your information is really helpfull.
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nairck
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Join Date: Apr 2011
Location: Located in INDIA.Kerala state,kottayam Dt,pala.
Posts: 42
#5

Re: Induced Voltage

05/16/2011 10:16 AM

The iron wire armour protect the magnetic flux from crossing it.External armour of other core is protecting its conductor from receiving linkage of flux.power cables are generaly designed as no interfering other any circuits.

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 Lalithambika
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needtoknow
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Posts: 12
#7
In reply to #5

Re: Induced Voltage

05/21/2011 6:53 AM

Thank you so much.....
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LAA_Lucke (1); nairck (2); needtoknow (3); PWSlack (1)

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