Answer Posted / vasudevan

DC has zero frequency. Hence, if DC is supplied then XL
will become zero. That is winding reactance is zero. Hence
winding gets short circuited and they will be burnt
immediately. It may cause severe explosive also.

A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

2383

---

what is kvarh? Please define it With calculation General motors ?

1224

---

71ohm,111ohm,95ohm,179ohm in calculate the total ohm in series circuit

1733

---

100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.

2419

---

why should the primary of transformer be connected in delta in a heat run test?

2025

---

what is lrs tank water resistance.

2592

---

while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends

2912

---

How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?

1827

---

armature winding of dc machine produce alternating emf then it convert in to dc by using commutator.But only we consider armature resistance why don't we consider inductive reactane effect?

2113

---

What do you mean by lighting transformer?

1105

---

How to check the LM324 Ic

8523

---

What is the formula to calculate the rating of a three phase air circuit breaker

2396

---

why does the magnetic balance tests at transformer?

1994

---

What is the diff. between single compression and double compression gland

2049

---

What is the meaning of C1, C61, C91 cable

3525

---