Answer / jakeer

Effective earthing:using a pipe or plate thro" ground.
resistive earthing:bank of resistors will be used for this
earthing.

Answer / ramesh

Effective earthing (grounding, for us westerners) means the electrical system star / neutral point has a direct, solid connection to earth. Resistive earthing has a resistor between the star point to earth. The resistor is used to limit earth faults to a lower value.

Answer / rajul(govind)

effective earthing means no disturb between earthing path
resistive earthing means many resistive disturb in path
earthing

I have 480V Single phase and I am trying to figure how big of a transformer (KVA's) and Primary breaker size I need to provide 200 Amps at 240V for a building.

1 Answers   Wipro,

---

what is the use of vcb & isolator in substation?

4 Answers  

---

Difference between field rheostat and armature rheostat.

0 Answers  

---

What is distance protection relay? where & why we use this relay?

2 Answers   Siemens, UltraTech, Voltech,

---

How the CT and PT ratings are calculated

5 Answers  

---

---

(1)For 3 No 1500 KVA transformer require on one single bus bar or need to be section through bus coupler means upto 3MVA.(2) 22KV Net work system as ring, How maney I/C required or 0ne I/C and one O/G.(3) What should be rating of VCB for 22 KV line.(4)Electrical/mechanical inter lock, why we need.

0 Answers  

---

Interchange 7 and 6 ,÷and× 36×7+4-7×3

1 Answers  

---

Main CT ration is 400/5, meter CT ratio is open type: -/5A. What is the Multiplying factor of the meter, considering same PT ratio.

1 Answers  

---

how to reduce the co level in your 1000kva dg set side?

1 Answers   Cognizant,

---

what gas is present in incandescent and florescent bulbs

4 Answers  

---

What is the meter used to check the DG sound level.and pollution check

2 Answers  

---

what ll happen to current if two phases get short circuited

2 Answers   Kirloskar,

---