Answer / balakrishnan

1.We can select the MCB's acoording to Voltage is simple,if
we want 230V,select single pole MCb's else want 415V select
3 pole MCB's.

2.We can select the MCB's according to to Curves is also
simple,there are several types of curvature available..
there are,
B type: react quickly overload i.e 3-4.5 times of full load
current
Type C: react more slowly,these are recommended for
inductive with high inrush currents like fluorescent lamp.5-
10 times of Ifl
Type D: 10-20times of Ifl,recommended for very high inrush
current.
Type K: 8-12 times of full load I,recommended for cable
protection to be provided which include
motors,capacitors,and transformers
Type S: 13-17 times of Ifl,recommended for protection of
control Transformer,

Type Z:

Answer / kundan kumar

MCB rating depends on voltage as well as load, so first of
all we will have an idea about load which will connected to
MCB.

why transformer comes only in standard rating like 11kv,33kv,66kv....and not like 33.33kv and so on?

3 Answers  

---

in gen traf what is ONAN , ONAF , OFAF and DYN

3 Answers  

---

what is the reason of capacitor failure in alternator which is working with 10 kva dgset

0 Answers  

---

effect of single phase transformer on full load current?

2 Answers  

---

what is meant by IGBT how they differ from tyristor ?

0 Answers  

---

how will be the capacitance generated in a earthed wire???

1 Answers  

---

How to calculate the TR (AC's)

4 Answers  

---

what is current overloading in stack

0 Answers  

---

why the CT ratio secondary is always divided by 5 for eg( 75/5,80/5,50/5)

6 Answers  

---

i have done my b.tech in 2009 .still hunting for a job...wat shud i answer if intervevwr asks..(what u have done 1yr)

1 Answers   TATA,

---

why humming sound occured in h HT transmission line

3 Answers  

---

wat is the function of an inductor? examples.....

4 Answers  

---