During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.

0 Answers  

---

What is the difference between rulling span and wind span of of an Over Head Transmission Line?

0 Answers  

---

explain in detail HV & LV bushing connection in power transformer (110 / 11 kv 16 MVA)

6 Answers   TNEB Tamil Nadu Electricity Board, wbsedcl,

---

How we can calculate the capacity the Air Condition capacity? like 1 or 1.5 ton's, What is the means of volume of Ton's in capacity of Air Compressor? Why in ton's,? not any other Volume?

2 Answers  

---

What is frantic effect?

0 Answers  

---

How do you select the pickup value of the relay?

0 Answers  

---

what is different between IP55,IP54 and IP66?

2 Answers   ABB, Global Industries,

---

pls tell me about ups internal connection & we have given only 3 phase supply to ups system how get 4 wire (R Y B N )

0 Answers   Bhel, IBM,

---

why colour of electrical equipment( like transformer) is grey

10 Answers   Trident,

---

On what basis primary and secondary of a transformer is chosen?

2 Answers  

---

why DG,Transformer,UPS capacity will be tell in KVA but not in KW?

4 Answers   Godrej,

---

please explain me about traction application?

2 Answers  

---