ABB-REG670 voltage protection(60) and fuse failure(RFUF)

[odlanor]

Does anyone knows the difference in the of application of Voltage differential protection (PTOV, 60) and Fuse failure supervision (RFUF)?
It seems samething.

 

[slavag]

Hi odlanor.
Its not same, differnt pinciple of operation and not only for REG670
function 60 is volatge phase differntial protection and two VT on the bus/line are needed.
FFS is voltage/curent function, operated on the U2/I2 or U0/IO or both of them principal.
Hope that help.

 

[odlanor]

slavag
I am talking about difference in the application, not principle of operation.

 

[slavag]

Sorry, my mistake.
Yep, application is a same.

 

[odlanor]

slavag . that's the problem.
REG670- function FFS block functions 40, 21, 27, etc
REG670-function 60 does not.

 

[slavag]

Hi.
its free programmable in the PCM600
depend on your standards

 

[odlanor]

Document ID: 1MRK502016-UEN
Issued: December 2007
Revision: B
IED product version: 1.1

 

[JG2828]

odlanor,
Can't you just set it up to block the functions you want under signal matrix?

 

[odlanor]

JG2828
I'm not familiar with the REG670 to answer you.
I always saw 60 function blocking those functions 21.40, ...
I wonder what is the advantage of using 60 or FFS to block functions 40, 21, 27.

 

[slavag]

Hi.
No advantages, its used, when you not have a second VT.
ActualLy, 60 is best solution.
Of course possible do it (if it prepared) in the single matrix.

 

[JG2828]

I agree that 60 is the best solution if you have two VTs.

This paper has some good information about the topic.

http://www.pes-psrc.org/Reports/Loss_of_AC_Voltage_Considerations_for_Line_Protection.pdf

 

[inpran]

You cannot block the function directly with the signal matrix. You can definitely do it using PCM600.