Answer / k.prakashchandra

The answer given by me is wrong as 110V DC is equivalent to
110 Vrms AC.But form factor= rms value/absolute average
value and is = 1.11.If you take DC voltage is as average
value itself then Vrms=1.11 DC volts which is wrong as the
formula applies to only sinusoidal AC.Considering the line
voltage drop ,the voltage could have been increased to 110 V
from 100V in USA which was the first country to utilize
electricity.

Answer / koti

It is form factor91.1) of ac multiplied by 10.

Answer / k.prakashchandra

The early usage of electricity was by 100V DC bulbs. After
AC was introduced the same bulbs were used with 110 AC
supply as 100V DC is equivalent to 110V AC applying the form
factor.Thereafter simple ratios were applied for transformers.

hi can you give any body fault level calculation, generator fault level calculation,transformer fault level calculation for system fault level with equation? i have 3.3kv generation voltage three gas gen sets, one is 1.9MW,2nd is 2.5MW,& 3rd is 3.8MW & i have 11 kv generation voltage one gas gen sets is 3.8MW, we are step up to 22kv by transformer

3 Answers   Hindalco, Piramal Healthcare,

---

Define magnetic centre in a motor?

1 Answers  

---

how we can select a transformer based on a particular load. suppose we have 4 motors of rating 40 h.p , 50 h.p, 80 h.p & 100 h.p. then what rating of transformer we can select. urgent. pls reply

6 Answers  

---

i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

0 Answers   IOCL,

---

How to set the star delta timer setting?

1 Answers   Integra,

---

How amny AH battery required for 600va inverter ?And how many hours it will give backup for ceiling fan ?

3 Answers   HCL,

---

How to connect the chemical earthing and complete process tell me plz

0 Answers  

---

I have a 380 KVA DG set. How can i find out 1. My Fuel Consumption per hr ? 2. Electricity produced in 1 Hr. ? 3. If load varies then how does it affect fuel consumption & electricity produced ? Please HELP !!! Really need an answer.

0 Answers  

---

What is LSIG ?

6 Answers   Apollo Power,

---

how to create new innovation what are the supporting sources in the electrical field for Electrical engineers.....?

1 Answers  

---

why voltage coil in wattmeter called as pressure coil why the pressure term is used in wattmeter?

1 Answers   NPCIL,

---

what is the different between earth leakage relay and earth fault relay?

5 Answers   ME,

---