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Join Date: Apr 2010
Posts: 4

How To Calculate Cable Burden

04/18/2010 6:08 AM

what is mean by Cable burden ? how to calculate burden value of cable?

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Engineering Fields - Electrical Engineering - Been there, done that. Engineering Fields - Control Engineering - New Member

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#1

Re: Mr

04/18/2010 8:49 AM

You don't really give enough information to explain which possible version of cable burden you have. You might be talking about the equations that make a catenary curve. You may need to know the tensile strength of a cable. You could even be referring to collisions in computer science. Lastly you might even be wondering about the harness strength for your donkey.

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#2
In reply to #1

Re: Cable burden

04/18/2010 10:55 AM

The cable burden is the load (in VA) imposed to CT secondary due to the cable resistance. When considered the CT load, the cable burden is also added to the other loads used in CT secondary.

The CT secondary load = Sum of the VA's of all the loads (ammeter, wattmeter, transducer etc.) connected in series to the CT secondary circuit + the CT secondary circuit cable burden.

Cable burden = I2 x R x L

Where

I = CT secondary current,

R = cable resistance per length,

L = total length of the secondary circuit cable.

If the proper size and short length of wire is used, cable burden can be ignored.

See also http://cr4.globalspec.com/comment/448082

- MS

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