Answer / a.p.nanjappa

as you are aware, in electrical engineering power
transformers or motor winding are connected in star-
undrounded or grounded,Delta connected.

Earth fault protection may be due to capacitaive
circulating current,flowing through the body of equipment
to ground. In large generator,motor it may be 5-10A
unbalanced current flowing through Neutral to ground, and
also fault current sigle phase to ground,double phase to
ground,or three phase to ground.these are severe
faluts.damages equipment severly.

how to decide the ratings of the busbar in electrification.give me the proper thumb rule or procedure

1 Answers   ABB,

---

how to calculate the cable size in sqmm if load (kw) is given?

5 Answers  

---

how to calculate kvar in Akiva

0 Answers  

---

We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

---

what is the differance between normal bybass & maintenance bybass in UPS?

1 Answers  

---

what is the formula for hv test for cable and circuit breaker..????

0 Answers  

---

What are the protection used for alternator,transformers.

2 Answers   Adani,

---

Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???

0 Answers  

---

What is an automatic controller?

0 Answers  

---

why transformer has more efficiency compare to rotating machine?

3 Answers  

---

What is difference b/w Microwave and OPGW ??

1 Answers  

---

what is star&delta connections?

5 Answers  

---