Answer / dilip singh

whenever a fault take place in any system. the fault
current start rising and it reaches to some high value.
your equipment are not rated for this high value so it will
get damaged. to restrict this fault current to rise. the
neutral of transformer or generator are earthed.
whenver the fault occurs the nautral passes this fault
current to ground and protect the costly equipments.

Answer / dpk_1fj

neural being earthed at consumer premise.the reason behind
to do that is if neural is lost,earth provide a parallel
path for return current and event of fault,fault current
pass therough the earth that ensure operation of protective
device.

If single phase having 220v so why 3phase is440v.

7 Answers   DLF,

---

how we design a pannel to start 10HP motor with the help of star delta starter?

0 Answers  

---

HOW GENERATING END VOLTAGE LEVEL (6.6 KV/ 10.5 KV/ 11 KV/ 13.5 KV) DECIDED IN POWER PLANT. ON WHAT FACTORS THE GENERATING END VOLTAGE DECIDED, & WHAT IS THE CALCULATION USED FOR THIS.

3 Answers   Areva, Cognizant,

---

what is method for testing CT

0 Answers   DCM,

---

What are the basic properties of signal flow graph?

0 Answers  

---

Why does The speed of motor used in elevator remain constant irrespective of load??

1 Answers  

---

What is meant by field loss in a DC motor?

1 Answers  

---

why we can't use more then 50 hz in india ? Is it possible ?

7 Answers   DVC,

---

HOW TO CALCULATE UPS BATTERY BACKUP TIME

3 Answers   HSBC, VRVS,

---

Define the overload capacity of the motor.

3 Answers   Alstom, Maynilad,

---

What are protections for dty type transformers

0 Answers  

---

What is the function of the auto reclosure relay?

1 Answers  

---