Answer / omar aziz

HVDC is a new development in the transmission industry.
Advantages are jwL tends to 0 and 1/jwC tends to infinity.
that means in your DC steady state operation inductors act
as a short circuit and capacitors act as open circuits
hance no reactive and active power . you alaway run a unity
pf.
Initially it was not feasible due to transformation but
thans to inverters and rectifiers, we wan convert DC into
AC transform it using a transformer and convert if back to
DC using a rectifier . Its is that simple,.

why we r not earthed Control cable of C.T. terminals

0 Answers   HCC,

---

what is the difference b/w single and three phase circuits?

1 Answers  

---

can you give main difference between ELCB And RCCB?

38 Answers   MCB Bank, Reliance, Wipro,

---

If a surge divertor is required to be protected by 32 amp C Curve Circuit breaker does this limit the amount of protection from surges that you will acheive

0 Answers  

---

why we use only sine wave in ac why we do not use other wave forms

21 Answers   BARC, NTPC,

---

what exactly commisioning work does in electrical site work... LT side?..

0 Answers  

---

How Flywheel run in DG set, tell in details

1 Answers   Sambhav, TATA,

---

what is mean by VCB colour code..???

1 Answers   Student,

---

give types of Air conditioners commonly used &its use?

5 Answers  

---

What is Percentage impedence of a transformer? why it is expressed at a percentage? what is the importance of percentage impedence in case of a transformer?

0 Answers   Haldia,

---

what is the full form of KVAR

6 Answers  

---

If a three phased motor or not working phased change on poles so how to find which one red yallow & blue

1 Answers  

---