848   Pole Slip LN is missing in P gruop

Created: 24 May 2012

Status: Future Improvement

Part: Part 7-4 (2010; Edition 2)

Links:

Page:

Clause: 5.11

Paragraph:

Category: Issue for edition 3 of this part

Issue

Protection logical node for Pole Slip protection which is also called loss of synchronism (78) is not defined in the Protection group logical node .

Proposal

Logical node of Pole Slip (PPS) has to be added

Discussion Created Status
20 Jul 12 Future Improvement
You could also use the LN class RPSB where you have the counter for the swings. 18 Jun 12 Discussion (red)
Henry, You are right, Pole slip, out of step or loss of synchronization represent the same function, the PPAM is named as “phase angle measurement” none of above which mis-leaded me, and it is modeled if I may say poorly, pole slip relay may be able to count the number of swing, direction motor or generator,… which are not even indicated in the optional signal. 31 May 12 Discussion (red)
The function can also be called Out-of-Step protection, can't it?
Then the LN PPAM can be used. 		27 May 12 Discussion (red)

 

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