Basic of Protection Systems

c
       
     

c
       
       1.? Y
 of fault and abnormal Condition to b
rottd againt 2.? Quantiti availabl for maurmnt 3.? Y
 of
rottion availabl 4.? S
d 5.? Fault
oition dirimination 6.? D
ndabilit / rliabilit 7.? Surit / tabilit 8.? Ovrla
of
rottion 9.? Pha dirimination / ltivit 10.?CY and VY ratio ruird 11.?Auxiliar u

li 12.?Bau

rottion 13.?Cot 14.?Du
liation of
rottion Y

    For LV S tm Ditribution Fdr and Yranformr VY Auxiliar Su

li     Widl ud in All Powr S tm 1.? gonDirtional 2.? Dirtional. ÌcYc For fdr Bubar Yranformr Gnrator t 1.? Ãigh Im
dan 2.? Low Im
dan 3.? Rtritd E/F 4.? Biad 5.? Pilot Wir

   For tranmiion and ubtranmiion lin and ditribution fdr alo ud a bau

rottion for tranformr and gnrator without ignaling with ignaling to
rovid unit
rottion .g.:

1.? 2.? 3.? 4.? 5.? 6.? 7.? 8.?

Yimt

d ditan
rottion Prmiiv undrrah
rottion (PUP) Prmiiv ovrrah
rottion (POP) Unbloing ovrrah
rottion (UOP) Bloing ovrrah
rottion (BOP) Powr wing bloing Pha om
arion for tranmiion lin Dirtional om
arion for tranmiion lin

    ! 1.? Undr and ovr voltag 2.? Undr and ovr frun 3.? A 
ial rla for gnrator tranformr motor t. 4.? Control rla : autorlo ta
hang ontrol t. 5.? tri

ing and auxiliar rla   "
  
 ! minimiz damag and dangr #  
 !?minimiz  tm intabilit dirimination and urit an b otl to ahiv. Exam
l: 1.? diffrntial
rottion 2.? diffrntial
rottion with digital ignaling 3.? ditan
rottion with ignaling 4.? dirtional om
arion with ignaling 
      Powr  tm dividd into
rottd zon mut iolat onl th fault ui
mnt or tion 
$  %  $   Prottion mut o
rat whn ruird to Failur to o
rat an b xtrml damaging and diru
tiv Fault ar rar. Prottion mut o
rat vn aftr ar of inativit Im
rovd b u of: 1.? Bau
Prottion and 2.? du
liat Prottion "  %"$   Prottion mut not o
rat whn not ruird to .g. du to: 1.? Load Swithing 2.? Fault on othr
art of th  tm 3.? Rovrabl Powr Swing  

   1.? go blind 
ot 2.? Whr
oibl u ovrla

ing CY