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Question
what are the  difference between protection class CT and 
Class PS CT
 Question Submitted By :: Vijaykunaseelan
I also faced this Question!!     Rank Answer Posted By  
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 1
Protection class CT give more accuracy than PS class CT.ps
class can use only unit protection but protection class
cant be used in unit protection.
 
Is This Answer Correct ?    9 Yes 56 No
Aruna Devi
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 2
class ps ct is a protection class ct.it is used for
differtial proction,distance proction.
 
Is This Answer Correct ?    45 Yes 3 No
Siddharth Agasti
 
 
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 3
Protection class CT are 5 p10 and 5 p 20 and PS class ct
are used where neutral point is available such that star
conneccted secondary of Transformer and alternator ,it is
used for differential protection.
 
Is This Answer Correct ?    25 Yes 7 No
Chetan Joshi
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 4
Protection class is ued in protection like over current
relay and earth fault relay of transformer,Alternator and
HT motor.PS class is used in DIfferential protection like
transformer,Alternator and HT motor.
 
Is This Answer Correct ?    13 Yes 6 No
Patel Indukumar
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 5
The Difference Between protection class and metering class
is mainly of saturation, the saturation values of protection
class is higher as when fault occur protection CT must not
get saturated as high current flows and metering CT can be
saturated as when fault occur metering is not necessary,
accuracy is also a factor but not the main factor
 
Is This Answer Correct ?    8 Yes 6 No
Mauhammad Yasir Abdul-rub
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 6
protection class ct have less acuuracy than ps ct 
Is This Answer Correct ?    2 Yes 5 No
Sanwan
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 7
Both Protection class and class PS CTs are used in
protection circuits only. As someone mentioned earlier,
class PS CTs are special CTs used in all types of
Differential Protetion scemes. they generally come in pairs
and they are special in sense their turns ratios,
impedances, VA burdens, knee point etc all these critical
parameters are exactly matched with each other.
 
Is This Answer Correct ?    8 Yes 1 No
Manoj
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 8
all the protection cts like over current
relay and earth fault relay of transformer,Alternator and
HT motors are having core 1 and core 2 options. CLASS PS
type is used only for differential protection purpose of
transformer,Alternator and
HT motors only. and this type of cts are available only in
PAIR SCHEME (PS) AND their turns ratios,
impedances, VA burdens, knee point etc all these critical
parameters are exactly matched with each other.
 
Is This Answer Correct ?    17 Yes 4 No
Shivaji Mangalagiri
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 9
the saturation point between the ps is higher than
protection class & metering.and the accurracy is also
higher then protection CT. It has highly efficient so it is
mosly used in sofasticated protections ( REF,DIFF,DISTANCE )
 
Is This Answer Correct ?    9 Yes 1 No
S.rajasekar
 
  Re: what are the difference between protection class CT and Class PS CT
Answer
# 10
the saturation point between the ps is higher than
protection class & metering.and the accurracy is also
higher then protection CT. It has highly efficient so it is
mosly used in sofasticated protections (DIFF,DISTANCE )
 
Is This Answer Correct ?    4 Yes 1 No
Satheesh
 

 
 
 
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