Answer / k.prakashchandra

sotf = switch on to fault ,lbb = local bus bar backup , pole
discrepancy = in 3 phase individually operated circuit
breaker ,all the three poles should close simultaneously
,otherwise there will be pole discrepancy .i.e, time lag
while closing .

Sir pl provide 5 year sample paper for post junior engineer(electrical).I have currently applied for junior engineer (electrical) on RRB Ajmer

0 Answers  

---

what happen when dc supply is given to the transformer

9 Answers   Bhel,

---

What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?

0 Answers  

---

If oil and air can withstand a high MeV when used as an insulator in a transformer, what are the values of how high for each material?

0 Answers  

---

working principle of AC Servo Motor with its construction

0 Answers   TATA,

---

What the difference between three phase contactor (coil 110vac) & three phase SSR (control voltage 110Vac)? May I use contactor in place of SSR?

0 Answers  

---

How to calculate the rating of ELCB OR RCCB for an equipment?

2 Answers  

---

What difference between ref protection and differential protection ?

0 Answers   EPC, INEL Power System Engineers,

---

how to calculate knee point voltage for pt?

1 Answers   Amec,

---

what is the difference between ground and neutral?

2 Answers  

---

why power factor is only cosine angle not sine angle?

2 Answers  

---

what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?

0 Answers  

---