Answer / renish2905

Becuse of the fault current is very large and small time about 1 second or friction of second.in this time CB is activated nearly less than of second.and all about calcualtion to took fault current time 1sec for easy to calculation.

Answer / asivasankar2k

As per my view, All equipment made to withstand 1sec only

Answer / adnan

Fault current is too large, about 7 times the normal current. If this current flows for longer time, it will burn all the equipments. So, breakers are designed to operate in 0.3 sec, 0.5 sec time if fault is not cleared in this time.
So such large current, even 1 sec is too long time.

does any one know where we can purchase insulation oil for high voltage oil filled cables

0 Answers  

---

Name the types of motors used in vacuum cleaners, phonographic appliances, vending machines,refrigerators, rolling mills, lathes, power factor improvement and cranes.

0 Answers  

---

In more then 1 phase bulb will glow are not?if yes then how it will glow?

2 Answers  

---

how i prepare for the written test in mahagenco?

2 Answers   MahaDiscom, MahaGenco, Wipro,

---

What would be the size of wire used for 2 Ton of window A.C?

0 Answers  

---

1)Explain why the cradle guard is used on railway crossing in overhead line construction?

0 Answers  

---

What are the different types of transformers present in the Transmission and Distribution system?

2 Answers  

---

on what priciple transformer works on?

5 Answers  

---

how to estimate wiring ins roughing ins. and boxes

0 Answers  

---

what is diffrent between plc and clc??

1 Answers  

---

An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?

0 Answers   HAL,

---

earth also having a gravitational force (magnetic field of north and south)but it attracts any object compare to this theartifical magnetic cant perform same as earth why?

0 Answers  

---