Answer / subaharan

first check the transformer bushings and their condition,then
you meggering the transformer each phase to phase and phase to
earth.
power cable you check the high voltage test which is used for
measuring the leakage current,meggering and continuity
checking.
switchgear the same meggering,isolator checking,relay
testing(set various values of currents,voltages and set time
for tripping) make the fault and note the trip time.

1.two coupled coils with L1=L2=0.6 H have a coupling coefficient of k=0.8 the turns ratio N1/N2 is......

5 Answers   BSNL, SSC,

---

What are the layers of protection over armoured cables?

3 Answers   Accenture, IOCL,

---

please tell me formula of 3 phase induction motor under condition{1]when we 3 phase motor starts without load in star or delta connection?thanks

1 Answers  

---

what is the instrument used for measuring insulator RESISTANCE

5 Answers   TATA, Transco,

---

why we are not earthing ht cable at both the ends(sending & receiving end)?

5 Answers   Essar,

---

---

What is the bundle conductor?

0 Answers  

---

all 3 current transformers (C.T) are burnt in a L.T Panel - what are the possible reasons

5 Answers  

---

Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?

1 Answers  

---

how the vaccum ckt breaker workes..? how the arc is quenching in it?

1 Answers  

---

the voltage per turn of a primary winding of a transformer is the same as the voltage per turn of the secondary winding of the transformer. why?

8 Answers  

---

if i have 5kw,9A,three phase induction motor,if i want to install it 100 meter away from its feeder,how i will culculate cable size for this load.

2 Answers  

---

what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....

7 Answers  

---