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Noptana
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Join Date: Jan 2015
Posts: 3

How to Vary Load for Calculating Fault in DPL Script

01/23/2015 12:08 AM

This is my script.

!================initial for short circuit====================

int i;

double j;

string name;

set S;

object shc,L;

shc=GetCaseObject('ComShc');

shc:iopt_mde=iopt_mde; ! Method for fault condition

shc:iopt_allbus=iopt_allbus; ! Location of fault

shc:iopt_shc=iopt_shc; ! Fault type

! Short Circuit Terminal

!======== Load F1 veriable=====================

for (j=1;j<=10;j+=1)

{

S=AllRelevant('F1.ElmLod');

L=S.First();

L:plini=j;

shc.Execute();! Execute Short Circuit Command

}
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Pathfinder Tags: DPL script
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
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#1

Re: How to vary Load for calculating fault in DPL script.

01/23/2015 1:19 AM

Have you found the fault yet?

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Noptana
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Join Date: Jan 2015
Posts: 3
#2
In reply to #1

Re: How to vary Load for calculating fault in DPL script.

01/23/2015 1:47 AM

Yes i have got a fault current but it does not change based on Load. In fact, it must change if a load is changed.

I have attached the Picture.

Thank you.
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Tornado
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#3
In reply to #2

Re: How to vary Load for calculating fault in DPL script.

01/23/2015 2:05 AM

I apologize for being somewhat facetious in my first comment. Most people will probably not want to wade through umpteen lines of code to find any bugs.

The spreadsheet picture is too small to read. However, in my limited experience, fault current is primarily dependent on the ability of a source to provide it, together with internal and conductor impedances; and much less so on the load. This may be why variations in load show little effect.

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Noptana
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Join Date: Jan 2015
Posts: 3
#4
In reply to #3

Re: How to vary Load for calculating fault in DPL script.

01/23/2015 2:31 AM

Have you ever used Digsilent Program?I have a problem with a code in program.
CAN I HAVE YOUR EMAIL ADDRESS PLEASE?
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Tornado
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#5
In reply to #4

Re: How to vary Load for calculating fault in DPL script.

01/23/2015 2:39 AM

Sorry; I am not familiar with that, nor do I have the software to process it.

However, Digsilent should have some on-line help resources and/or user groups that could be helpful.

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Crabtree
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#6

Re: How to vary Load for calculating fault in DPL script.

01/23/2015 3:07 AM

Nonsense. Fault currents don't pass through the load. That's why they are called "fault"!

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SHOCKHISCAN
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#7
In reply to #6

Re: How to vary Load for calculating fault in DPL script.

01/23/2015 8:27 AM

Sorry but this statement is not correct wherein the fault is caused by the load device(s).

Example: Shorted or grounded motor windings are indeed a fault and massive current flows through the windings until the protective device clears the fault by disconnecting the faulted device from the system.

The length of time and the magnitude of current that flows through the faulted downstream device is determined by the number of cycles allowed to occur before relay operation is initiated.

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Crabtree (1); Noptana (2); SHOCKHISCAN (1); Tornado (3)

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