Answer / vineet yadav

to protect the land , and to avoid the stay of water and to avoid the grow of the grass

Answer / shiva

To avoid the rodent,snake movement and grass developing

Answer / prof. dr a s kandasmy

primarily it offers safety from step and touch potentials to the operating personnel while there is a short circuit in the system and the fault current flows back to its source.it also an impediment for the reptiles to crawl and climb on the equipment and also retains the moisture content of soil to some extend and there by the resistivity of the soil kept at low so as the fault current will flow to earth at ease.weed growth is also prevented.

what will happen if we double the input frequency of a transformer keeping the voltage constant?

6 Answers  

---

what r the checklist while installing a 380 kva DG set

0 Answers   Pepsi,

---

I decided to provide a 11KV / 440V Xformer in my Substaion. What are the protection required for that?

5 Answers  

---

what is the function of short circuit maintenance ct and droop ct.

1 Answers   L&T,

---

(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  

---

how to test power transformer.YNd11

0 Answers  

---

what is interference

1 Answers   L&T,

---

I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

0 Answers  

---

what is the effect of power factor in electrical circuit ? if we mainten power factor near about unity (0.999) our energy consumption Units increase or decrease?

11 Answers   Piramal Healthcare,

---

while conducting an experiment why we connect the armature rheostat in maximum position and field rheostat in minimum position

1 Answers  

---

formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?

0 Answers  

---

how dc ct works?

3 Answers  

---