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.

Name of the relay of low lub oil presuure in DG sets

1 Answers   Lineage, Sterling,

---

What is Earthing?

16 Answers   Essar,

---

In LT cables 3.5 core cable are available that means 3 core and .5 for neutral Why .5 for neutral and is there any reason for that please suggest thanks and regards pavan kumar

1 Answers   Sodexo,

---

if 20 hp motor starts directly stars and contenious run . what will be the effect.

11 Answers   HP, Ohsung Electronics,

---

if we connect a ohmmeter across shorted capacitor .what will be the reading..will it be zero or infinity

2 Answers  

---

How to Preparation of online test

1 Answers  

---

Why do power lines not short out when they fall into water?

1 Answers  

---

how can we test the vector group of transformer

1 Answers  

---

We all have seen transmission and Distribution lines In transmission lines the voltage is high and current is low(to reduce I^2r loss) and in distribution lines voltage is low but current is high however the size of transmission wires is bigger than that of distribution wires even though the amount of current carried by the distribution lines is more than that of transmission lines why?

4 Answers  

---

why test lamp didn't glow across 500v megger?

4 Answers   Aurobindo,

---

how the calculation is done if the DG set require for the -- -48 to -51v 4000 ah battery set .

1 Answers   BSNL,

---

what is XLPE cable?

2 Answers   Essar,

---