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Question
directional over current relay when acted & how it works
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Directionalized relays are relays that use a polarizing
circuit to determine which "direction" (in the zone of
protection, or out of the zone protection) a fault is.
There are many different types and different polarizing
methods - ground polarizing, voltage polarizing, zero
sequence voltage polarizing, negative sequence polarizing,
etc.

The basic operation of this relay is just like any
nondirectional relay, but with an added torque control -
the directionalizing element. This element allows the relay
to operate when it is satisfied that the fault is within
the zone of protection (ie not behind where the relay is
looking).
 
Is This Answer Correct ?    6 Yes 0 No
Engr. Ajay
 
Answer
# 2
the directional over current relay acting when the current
flow in perticular direction above relay setting.

It consist directional as well as overcurrent element.

the directional element sence direction of current then
o.c.element acting.
 
Is This Answer Correct ?    11 Yes 7 No
Aniruddh
 
 
 
Answer
# 3
i con't get u .plz send clear answer Aniruddh 
Is This Answer Correct ?    0 Yes 3 No
Ramya
 

 
 
 
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