Answer / nishad

My question is Why Earthing is not required in Xformer
primary star point of Star / Star connection????

Answer / k.prakashchandra

Eatrthing primary neutral of star/star Tr at the receiving
end is of no use for protection and safety . At sending end
neutral is earthed and it is sufficient.

How to select AC3 duty contactor for DOL & Star-Delta starters

1 Answers  

---

what is transformer?

4 Answers   Mphasis,

---

fuses rated by amperes but not power,why?

3 Answers   Blue Star,

---

Isolation transformer primary to sec turns ratio?

2 Answers  

---

where they are using surge arrester and lighting arrester? how they connect? what is the purpose of that?

1 Answers  

---

How the flights will be fly be fly without ground connection under raining with thunder lighting?

1 Answers  

---

what is the IS foe lightning arrester?

0 Answers  

---

wat do knw aboot circuit breakers ?

9 Answers   IOCL,

---

What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

0 Answers  

---

how to select a capacitor, i mean we use 3.5 mico ferad cap for a celling fan,but how to select a cap for 1h.p motor,etc.........

1 Answers  

---

Why should we use Star-Delta connection in step down power transformers?

7 Answers   L&T,

---

how to test reverse power trip?

0 Answers  

---