what is means of ALF,kPV(min),lexc(max)at Vk,Rct@75 degree centrigate ohm in c

what is means of ALF,kPV(min),lexc(max)at Vk,Rct@75 degree
centrigate ohm in current transformer name plate?

Question Posted / varun tripathi

2 Answers
5709 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what is means of ALF,kPV(min),lexc(max)at Vk,Rct@75 degree centrigate ohm in current transformer n..

ALF--accuracy limit factor(ratio of nominal over current to the rated current)
KPV--knee point voltage(secondary voltage must be less than KVP so that ct accuracy will not hampered)
KPV=k.Is(Rct+Zs) where Rct=resistance of secondary winding at 75 c

Is This Answer Correct ?

2 Yes

0 No

what is means of ALF,kPV(min),lexc(max)at Vk,Rct@75 degree centrigate ohm in current transformer n..

Answer / m.esakkiraja

1. ALF - Accuracy Limit Factor
It is the ratio of Instrument limit primary current to the Rated primary current.

2. KPV- Knee point Voltage
It is defined as a point where 10% increase in the Secondary Voltage causes an increase in the Secondary Current by 50%.

3. Iexc- Excitation current
A transformer exciting current is the current or amperes required to energize the core.

4. Rct @75°C - Resistance of Secondary winding on CT at 75°C.

Is This Answer Correct ?

1 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

why we short ckt the secondry vo5tage/ winding in transfr and motor?

2 Answers

what is principle in relay testing kit?

3 Answers

I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.

0 Answers KVF,

Hi,i want to appear for IES (EEE),can any one plz help me how to apply and how to prepare

1 Answers

what are 3 factors when selecting a contactor for a job?

1 Answers

what are factors comes under relay setting (distance relay 7sa52) under OPEN DELTA VTs connection??

0 Answers

What is the difference between ground & earth or neutral

1 Answers

Why transformer is not rotating?

20 Answers BARC, Nerolac,

What is the difference between surge and impulse?

4 Answers

what is the relationship between horse power and watts

9 Answers

can anyone please help me to find the rupturing or breaking capacity in KA of circuit breaker (MCCB,VCB,ACB etc) of HT and LT side of a distribution transformer...please help with detailed step by step answer...thank you

0 Answers

what is over cureent protection

3 Answers Anil Group, MPSEB,

For more Electrical Engineering Interview Questions Click Here