WHY THAT THREE COLORS CHOOSEN IN 3 PHASE? WHAT IS MEAN BY RYB?

2 Answers  

---

Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

4 Answers  

---

how to calculate busbar size? ex:11000kva main what is the busbar size ?and how to select the correct one

4 Answers  

---

Where servomechanism is used?

0 Answers  

---

What is the function of UV coil ACB?

6 Answers   DLF,

---

---

Is it alright to connect more than one RCCB of same rating in series for a three phase equipment?

3 Answers  

---

what is cathodic protection and why it use in industries?

0 Answers  

---

I want formula to calculate current loss with distance in km.I searched many sites but didn't right answer.Plz reply me

0 Answers   SECL,

---

Hi all, please could anybody give me a suggestion about Electrical designs and calculations .. what text book should i follow as i am a trainee engineer and here work going not so favorable to me so please help me friends .. A small discription about my work which is going here is all about Electrical designs like cable sizing, lighting, lightning, Gensets sizing, motor sizing, transformer sizing, generator sizing, circuit breakers, PDB MCC PCC SLDB MLDB panels, Single line diagrams mainly, substation desings, cable routing and layouts, reactive power compensations, power factor improvement, voltage drop calculations, power generations, power transmission, power distributions all calculations i need .. please please if anybody experienced with this problem and got a solution then please help me .. just i need an apt text book for these all calculations and designs ..

0 Answers  

---

How to select busbar?

2 Answers  

---

What is the possible cause for failure of lightning arrestors in outdoor substation under normal condition

0 Answers  

---

How would your past experience translate into success in this job?

0 Answers  

---