Answer Posted / manohar

The resistivity of Earth is 100 ohm-m compare this with
resistivity of copper which is 1.7 x 10-8 ohm-.m (
0.017ohm-mm2-m) & that of GI is 1 x 10-7 (0.1ohm
-mm/m),definitely neutral earth is more resistive than
copper or GI.eVEN INDIAN STANDARD recognasises this fact.It
mention in the clause 0.3 that the "the earth now rarely
serves as part of the return circuit, but is being used
mainly for fixing the voltage of the system neutrals"

33kv Rated output avilable in market (any where in india)

2072

---

for compensate 315mh inductance ,how many capaciance required?

2046

---

What is the significance of integral controller and derivative controller in a pid controller?

1155

---

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

3473

---

what is the difference between online & offline caliberation of KWH meters. Can Digital meters be caliberated

1970

---

how to select overload-relay for perticular motor 1.for D.O.L. starter 2. for Star-delta starter ????

2819

---

In ACS 1000 drive we are using 12 pulse converter,why don't use 3 pulse converter.

2012

---

There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2

1887

---

What is conventional thermal current (Ith)

4431

---

Safety of dry type transformer

1957

---

Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

3337

---

i want to know that how the height of Ct ,cvt ,LA calculated on the basis of creepage distance

2601

---

explain all the classes with example

1956

---

Define rise time.

1119

---

how to check avr of dg set of 125kva

2589

---