Answer / engr. l. o. osuji

Hi,
Voltage by definition is the potential difference between
two points e.g phase-neutral is 230V and line-line is 440V
according to you. You cannot measure the voltage of a line
alone. If, however, you insist on measuring the voltage of
the line alone your result will be zero. It must be between
the line and something else.

Answer / aboli

I jst wnt to add something in previous answer.In AC System
all three phases are 120 degrees apart & if u take vector
sum of it u will get 0.Hence it follows KVL.
Vector Vr+Vector Vy+Vector Vb=0.

What is the difference between Type test and Routine test?

10 Answers  

---

Just a silly question but just to make my curious mind bac to normal - Why was not 67 and 67N relays built into a single relay as i have noticed that the R,Y,B CT wiring end up into the 67 relay while the common of the R,Y,B CT wiring end up into the 67N relay. Then it was better if a single relay was manufactured just like the distance relay (21). Another question i would like to ask is - how do we know where the 67 and 67 N relay has to be placed.why is it not placed at the transformer bay? In the substaion that i am working -i have noticed that it is placed between a breaker and a common double bus bar and this line bay is connected to another substation at a remote place which is furthur connected to a load. B U S______CT for 67 & 67N ______Breaker _____ remot s/s. B A R

1 Answers  

---

how to calculate the capacitor to maintain power factor?

0 Answers   Bosch,

---

what is electricity

4 Answers  

---

can you use 400 volt 3 phase and neutral and earth equipment on 440 3 phase and earth supply safely and if so how?

2 Answers   Maersk,

---

What is “pu” in ee?

0 Answers  

---

how we can produce negative DC voltage ? please explain it .,thank u

1 Answers  

---

state application of relay in transmission line?

4 Answers  

---

What is the difference between SSR drive& AC drive?

1 Answers   ITC Infotech,

---

What are the advantages & disadvantages of a group electrive drive?

0 Answers  

---

in india,we use 230V,50 Hz,whereas many other countries use 110V,60Hz.what r d advs and disadvantages of each of them?

11 Answers  

---

What is meant by Energy Efficient Transformers??? give significance

1 Answers   MahaGenco,

---