Close Up Faults 1

[Ashdgee]

Hello all,

I am doing a relay settings study for 2 back up MV generators.In the relay manual for MiCom , they did mention the term Close-up falts.

Can someone tell me what is a close up fault (I have heard of close in/out faults)

 

[davidbeach]

Probably the same thing as a close-in fault.

 

[che12345]

Dear Mr. Ashdgee

Q. "...In the relay manual for ... , mention the term Close-up falts (fault)...".
A I am of the opinion that it is a translation "slip".
a) The terms [Far-from-generator short circuit] and [Near-to-generator short circuit] is used in IEC 60909
b) Refer to IEC 60909 for their definition and application in short circuit current calculation.
Che Kuan Yau (Singapore)

 

[RRaghunath]

'Close-up' refers to fault close to the generator terminals.

 

[che12345]

Dear Mr. RRaghunath
Please advise which Standard viz. IEC, ANSI or publication etc., states " 'Close-up' refers to fault close to the generator terminals."
Che Kuan Yau (Singapore)

 

[waross]

That would be in the MiCom relay manual. (Under the scope of "etc.")

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[crshears]

I'd agree it's probably a translation thing; in my neck of the woods, "close-up" is a photography term, and a "close-up fault" would be something like the way a picture turns out where the distance between the camera and my face is so short that not only does distortion occur but individual nose-hairs can be counted...

'Close-in' is the term we use for faults close to the supply protective device, most typically a circuit breaker of some sort.

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]