Answer / amit khamesra

Conventionally only PS class CT shall be used for unit
protections. But now a days, with the use of miro processor
based relays having facility of low impedance or biased
differential protection, 5P20 may be used as biasing in the
relay takes care of the unmatched characteristics of the
both side Cts.

Answer / avdhesh

Class 5p20 CT is a protection class CT which is used for
normal protections. For differential protection you must
use class PS CT.

Answer / persistence

yes 5P20 class CT can be used for differential
protection,In our industry they have been used for
transformer differential protection,transformer being 10 mva
and for bus differential protn. class PS has been used.

Answer / dharmaraj

For diff.protn you must use ps(or) px class CT.

Answer / dheena hitech

For diff protection we should be use PS or PX class Because
of yjat one ine is spl. class for diff and Dist protection

WHAT IS VFD,FUNCTION, PURPOSE,

2 Answers   RasGas,

Your B.tech marks is being given in CGPA grade. How is it calculated?

1 Answers  

which cable is used for 15 Hp monoblock pump 3phase and service wire Distance is 210 feet please tell me cable size Armaured

0 Answers  

srij i need the relationship b/w KW AND KWH and with an electrical example. plz send if u can?

4 Answers  

why are u join ntpc

0 Answers   NTPC,

What is transmission line potential gradiant?

1 Answers  

hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

0 Answers  

for selection of transformer we will considering 5 to 6 times of starting current of higher rating motor connected to secondary side. according to process wise we will start the motors gradually suppose if we will start 15 to 20 motors at a time wat will happen?

1 Answers  

What will be the direction of rotation of a Alternator in case it goes in motoring action when connected with grid ?

6 Answers   DVC, NTPC,

sir pls tell me . our ct specifications are 120/5 ,2 core , 0.2 and 5p10 class , 30va and 30va buden. insted of 30 va i want use 15 va. can i use?

0 Answers  

in 3 phase induction motor resistance value is how much

1 Answers  

in 33/11kv stepdown transfomer, transformer will stepdown to 11kv & remaining 22kv where it will go..

3 Answers