L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

0 Answers  

---

TO operate transformers in parallel, vector symbol of the both should be same.If one transformer name plate is not there, how can we conclude that whether the transformer is having the same vector symbol or not?

4 Answers  

---

how is positive, negative, zero sequence is happen.. how is effect on 3 phase system

0 Answers  

---

How to calculate HT XLPE CABLE for 11 kv / 433 v , 1500 kva oil type transformer system? plz provide step by step calculation

15 Answers   Engineers India, Indian Railways, Polycab, Shashwat, Sitara Energy, Sonali Bank,

---

why dc exicitaion used in ac motor....?

2 Answers  

---

---

A 200 KVA UPS's load current is 70 A. We want to provide a Generator back up. What capacity of DG required for this ?

1 Answers   Reliance,

---

how to give earthing in plain?

0 Answers  

---

what is use of substation? Any book on how to instal or construction of substations?

6 Answers   Siemens,

---

What is the function of electron gun assembly used in crt?

0 Answers  

---

wd do u understand by stablity of ps?

2 Answers   IOCL,

---

lightning current is ac or dc..?????

7 Answers  

---

transformer losses

1 Answers  

---