Just a silly question but just to make my curious mind bac to normal

Just a silly question but just to make my curious mind bac
to normal - Why was not 67 and 67N
relays built into a single relay as i have noticed that the
R,Y,B CT wiring end up into the 67 relay
while the common of the R,Y,B CT wiring end up into the 67N
relay. Then it was better if a single relay was manufactured
just like the distance relay (21). Another question i would
like to ask is - how do we know where the 67 and 67 N
relay has to be placed.why is it not placed at the
transformer bay? In the substaion that i am working -i have
noticed that it is placed between a breaker and
a common double bus bar and this line bay is connected to
another substation at a remote place which is furthur
connected to a load.

B
U
S______CT for 67 & 67N ______Breaker _____ remot s/s.
B
A
R

Question Posted / bejoypeedikayil

1 Answers
2925 Views
I also Faced
E-Mail Answers

Just a silly question but just to make my curious mind bac to normal - Why was not 67 and 67N re..

Answer / k.prakashchandra

Such relay is available

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

Why armour HT XLPE power cable required to Earth?

1 Answers

what is the differenc between A.C. and D.C, which is more dangerious?

4 Answers

what happens when dc supply is given to the transformer?

3 Answers

How to Calculate KA Rating of Main LT Panel

0 Answers

in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks

0 Answers

Diode is active or passive element?

14 Answers Infosys,

need help, please can someone tell me how can i calculate the main breaker and branches breakers to distribution panels (MDB) depending on the load ampere .. i really need it but can't find any site >>

3 Answers

Where is servomechanism used?

0 Answers

single phase can run in PVC conduit. Three phase can also run in one PVC conduit. But two phase cannot run in one PVC conduit. WHY? reply plz....awaiting your answer.

8 Answers L&T,

Is it possible to control the power in transmission lines by remote controlling method?? if yes explain in details???

1 Answers

How to Calculate the current drain in the battery (1.4V) for the 2mins time period?

7 Answers

what is d main difference between KVA and KWA

2 Answers Charoen Pokphand,

For more Electrical Engineering Interview Questions Click Here