Answer / v.sugumar- kurinjipadi-cuddalo

surge arrestor installed in indoor application like SWG
panel, HT motor termination box and etc..Lighning arrestor
installed in out door,example: top of building,and it is
connected to earth, incase of lighting air terminal will be
atracted by lightning and it is grounded.

Surge arrester installed in the power line, incase of hi-
sugre in the line, surge arrester (MOV) metal oxide
verister will conduct to the ground, and it will return
back to normal state. MOV during normal state the
resistance is high, when the surge incresed above the
certain limt it wil reduce the resistance.

Answer / eee

surge arrestor: these are capacitive/ solid state devices
which prevents sudden rise in voltage (max 2Vrated)
lightning arrestors: these are nonlinear elements, provides
high impedance in normal working, very low impedance at very
high voltage (lightning)....
withgap metal oxide will have higher voltage carrying
capacity. then the without gap MO.....

What are the no-load losses for the 11000/415V transformer with the following rated capacity? 1.1500 kVA 2. 2000 kVA 3. 2500 kVA 4. 3000 kVA

0 Answers  

---

I want to know that a 160kva diesel generator contains capacity of 160kva on each phase like R=160 Y=160 B=160 total RYB=480kva or it is total capacity of all there phases like RYB=160kva ... thanks in advance ...

2 Answers   jlpl, JP Saraswat Engineers,

---

why it is unable to birds to be on a 220kV 0r 132 kv lines like on 33kV and 11kV lines?

4 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

---

What are the different protection systems used to protect the transformer internally and externally?

16 Answers  

---

What are different types of control systems?

0 Answers  

---

what are the advantage and dis-advantage of 3 phase 4 wire energy meter?

0 Answers  

---

we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards

0 Answers  

---

When in a large power system if the demand of power is larger than the generated power the frequency of the power system drops.(assume the rated frequency is 50Hz and now it is 49Hz) So does this mean the demand is totally supplied with a lower value of generated power in a lower frequency?

1 Answers  

---

what are the safety measure & controls in engine?

2 Answers   RRB,

---

What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?

0 Answers   ABB, APL,

---

if we convert watt into kva,which one formula use by us,pls tell me?

16 Answers   ABB,

---

when the flux enters into saturation mode then what will be the secondary voltage of the normal t/f?....high or low ? explain ...how?

1 Answers  

---