Answer / rajeevkumar

just read abt form factor....

Answer / shashidhar

Transformer Induced voltage equation contains 4.44 factor.

E=4.44*f*T*phi
E -Induced emf per phase
T -number of turns
f -frequency
phi -maximum flux per pole

From the equation we see that E is proportional to 4.4 and
it is in turn multiple of 11.
So always transmission voltage is multiple of 11

This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

---

what is the use of Antipumping in HT breakers.

9 Answers  

---

hello freinds what is advantage and disadvantage of plc again dcs?

2 Answers  

---

can we install LT panel & HT panel in one room?

1 Answers  

---

How to calculate mf when meter equipment and meter are connected

0 Answers  

---

---

Is it any dc fuses availbale in market? can we use one fuse for both AC & DC ?

6 Answers  

---

Upload data by LSMW via BAPI in SAP system.

1 Answers  

---

How to calculate LT Network length in power distribution ? Service cable length considered or not?

0 Answers   Torrent Power,

---

why ss stablity limit is more transient stablity limit?

0 Answers   IOCL,

---

In 90 kva alternator that produce the output voltage is 115(p-n),200(p-p) at 1500 rpms means what ampere it produced ?

0 Answers  

---

Dear Sir how much cable size required from 0.75 kw to 50 kw for electric motor or pump

1 Answers  

---

sir i ve applied for hindustan petroleum and power grid india ltd..and the exams on feb 22.can you pls send model papers and tell how to prepare for those.i need to get into any of these for sure.....

0 Answers  

---