In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?

2 Answers  

---

what is the reason for drop in freq. from 50 hz at generating side to 49.8 ,49.6 etc.at receiving side???

2 Answers  

---

HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT-SWITCH BOARD,MLDB,ACB,BUSBAR,ETC,......?

0 Answers  

---

what do you mean by mf of energy meter & its formula?

4 Answers  

---

what is the pre charge circuit,what will be work which function it will be use plz tell me

0 Answers  

---

how electical engineer is related to apsrtc (general) post? if they ask a question in interview as why did u choose this job what shd be answer

0 Answers  

---

What are test signals and their significance?

0 Answers  

---

We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

---

if the 10 hp motor name plate indicates rated current as 13.6 amp the what will be the thermal relay setting? Why? And in how much time relay will trip at the set value?

2 Answers  

---

what is meant by CT burden = 10 VA?

1 Answers  

---

If we connect a motor and generator together (I mean that the generator gives the motor electricity and the motor gives the generator movement) regardless the losses. Will the generator still generate and the motor still move?

0 Answers   Cap Gemini,

---

How much resistance between neutral earthing and body earthing of Power transformer?

1 Answers  

---