Answer / k.prakashchandra

Panther for 30' C rise 487A .for 50'C 526 , Dog - 254 and 311

WHAT ARE THE DISADTAGES OF SINGLE-WIRE-EARTH-RETURN SYSTEM USED FOR RURAL ELECTRIFICATION?

0 Answers  

---

In a 11000/440 V transformer, when any one phase of 11 KV supply fails (ie., single phasing), what happens to the secondary voltage and why?

3 Answers   Secure Meters, TCS, Torrent Power,

---

why chock were used in old tubelights but are not newest tubelights?

0 Answers  

---

We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.

2 Answers   KPTCL,

---

What is defference between earthed and unearthed cable(HT)? Which is better for under ground cabling?

1 Answers  

---

why it is necessary to maintain frequency constant in a power grid ?

1 Answers   NTPC,

---

(1)WHAT HAPPENS WHEN SUDDENLY LOAD GIVEN TO THE INDUCTION MOTOR ? (2)CAN WE MAKE WOOD AS MAGNET ? (3)WHAT IS THE VALUE OF MAGNETIC FLUX DENSITY IN TRANSFORMER ? (4)WHY WE ARE USING ELECTROMAGNETI NOT ELECTROSTATIC IN MACHINE ?

0 Answers   Cognizant,

---

tell me any book for current n potential trasformer with full knowledge ?

1 Answers  

---

Why the wave trap is put in Y phse only in switchyard?why not in other phases?

1 Answers   IAG Automation, REL,

---

Hello sir. if u have electical engineering exam paper then plz mail me at bhumika_1187@yahoo.co.in. i m appearing exam for HPCL.

1 Answers   HPCL,

---

when we see the lube oil grade its 15w/40 or 20w/40 in this what is W Explain breifly

1 Answers  

---

what kinds of Transformer oil grade is better for power transformer ?

0 Answers   KSRM Steel Plant,

---