what is back trip and re-trip in protection schemes? why these two? define me the exact function of these two?

1 Answers   Siemens,

---

Whats the difference between three phase and single phase?

4 Answers  

---

what are factors comes under relay setting (distance relay 7sa52) under OPEN DELTA VTs connection??

0 Answers  

---

Can the Neutral and Body Earthpits of a transformer conncted together by Earth strips under ground.

4 Answers   SanDisk,

---

why dc current is supplied in america rather than ac

1 Answers  

---

SIR, GIVE ME OPGW SAG CALCULATION FORMULA I AM DAE ELECTRICAL. THANKS

2 Answers  

---

How to Calculate Current Rating of SDFU (Switch Disconnector Fuse unit) for Protectionof Capacitor Bank connected to Busbar of 800Amp,in LV side of 11/0.433KV, 250KVA Transformer?

0 Answers  

---

What is miller crystal oscillator? Explain its operation?

0 Answers  

---

What is the difference b/w RMU & substation

1 Answers  

---

whydoes the p.f of diesel generator always be 0.8 explain how will you determine the shortcircuit capacity of network

1 Answers   Dalkia,

---

what is the iron loss in a 11KV/440V transformer?

2 Answers   Bhel, TVS,

---

what is the aircraft voltage and frequency standard ?

1 Answers   Jet Airways,

---