Answer / nur.asidik

differential/87G-need two sets of CTs, coverage are protection is only area between CT,
overcurrent/50,51--only need 1set CTs, Relay trip CB regardless fault location

Answer / raj

Differential protection relating to Voltage induced in the alternator with prescribed limit(In Common words. the protection circuit is used to trip the generator when over voltage is produced by the generator)
The over Current Protection is used on the output side( at terminal) of the generator ( when the load is exceed with limit of the alternator then it will trip the O/P ckt for safe limit of the generator

what is the breakdown voltage value in BDV test in transformers?

6 Answers   Siva, TATA,

---

why odd hormonics only will effect the power system.why not even hormonics

1 Answers  

---

Draw a circuit diagram in which if button is open we can use socket and bulb as a series test circit and if button is close than simple we can use socket as any load purpose.

0 Answers  

---

What is the difference between Split ring and slip ring?

8 Answers  

---

what is meant by power factor ?

17 Answers   Harita, Pricol,

---

---

why ac signals are sinosuidal

2 Answers  

---

how we can check the CT & VT?

2 Answers  

---

What will be the change in its efficiency and other parameters of a ONAN transformer if it changed to ONAF transformer ?

3 Answers   Tesla,

---

How to increase the specific gravity of DG batteries?

12 Answers   SCS,

---

if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current

0 Answers  

---

WHAT IS SEMICONDUCTOR? EXPLAIN DETAIL. FOR EXAMPLE TAKE A PENCIL.THE LEAD IS MADE UP OF GRAPHITE IT IS A CONDUCTOR.THE OUTER COVER IS MADE UP OF WOOD IT IS INSULATOR.PENCIL IS A SEMICODUCTOR MATERIAL.

5 Answers  

---

i ha done my 10th with 71% ,ITI with 81% 11th with 75% 12th 43% apprentiship with 71% in SAT i secure 1390 ,TOEFL 27 i was refused four times and in all me interview visa officar told that i am not Qualify for study in USA but i completed my 12th yes i got low persentage in my 12th but i seen to much student they already got visa with them 3 or 4 backlocs so why they are refused me ?

0 Answers  

---