Answer / nilkanth tailor

THYRISTORS: SCR,GTO.TRIAC..etc...
POWER SWITCH: IGBT,MOSFET...

thyristorts is like diode mainly unipolar device, only
conducts in one direction.
By the way TRIAC(AC switch- made by cross parallel
connection of SCR) can conduct in both direction but it
reactive loads can cause it to fail to turn off during the
zero-voltage instants of the ac power cycle...so require
snubber circuit to turn off that TRIAC in each half cycle...
so it has to take more time to turn off or on...in
comparison of IGBT and MOSFET...

At high freq switching devices thyristors can not use
becouse at high freq , time is inversely proportinal to the
freq, so thier is less time require to operate. AT that
time we require IGBT- fast switching response

Answer / venky

thyristor is a thyristor

How to calculate incomer of a capacitor bank/feeder from its KVAR, AND how to calculate the copper busbar for rated incomer,like for 400A we calculate the 40x10 of aluminum busbar.

1 Answers  

---

diff.between servo motor and ac motor

0 Answers   Power Grid,

---

In transformer how measure the winding temperature ?

5 Answers  

---

in india why the generating voltage is like 11kv,22kv etc

1 Answers   Alstom, Ford,

---

What are eddy current and define rms value?

4 Answers   NTPC,

---

why power is generatd at 50 hz only..? can we do this on another freq...?

7 Answers  

---

what happens when back charging of transformer is done for longer period

1 Answers  

---

why HT motors are earthed only at equipment side & for it's single core cable with aluminium wire armoure using?

1 Answers   Legrand, NLC Neyveli Lignite Corporation Limited,

---

WHAT IS FORMULA TO KNOW TO BACKUP TIME OF POWER PLANT 48V/50AMP DELTA POWER PLANT

1 Answers  

---

how to prepare PPM schudule

3 Answers   TATA,

---

what do you mean by class PS CT and what are technical details needed for calculating it?

0 Answers  

---

and gate circuit diagram,amplifier circuit diagram

0 Answers   NHPC,

---