Answer Posted / shivkumar sharma

Between Earth to phase insulation resistance must be twice
of operating voltage by H.T.( 2.5 k.v./5 k.v. )megger

What do you mean by dependent and independent voltage sources?

1042

---

what is draiv work

1891

---

a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

1701

---

What is the formula to calculate the no load current of a single & three phase induction motor

2271

---

trasnfarmaer core make

1956

---

what is cathodic protection and why it use in industries?

2281

---

On what basis the the size of Lightning arrester for buildings are selected ?

1648

---

In ups static switch if i gives the supply at output end it will open the circuit in stactic switch or not if it will open then how it operates.

2301

---

what is thresold of perception

2064

---

at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.

1661

---

How earthing/grounding done in aeroplanes and ships.

3617

---

What are the effects of electrical faults?

1023

---

can you plz send l&t aptitude questions if available its urgent plz plz plz

2110

---

why the rotor current becomes in steady state during high slip region? please verify with equations.

1981

---

What are the different power system losses and how can it be eliminated?

2047

---