Answer / shamshad ansari

First stage fault  only alarm and second stage trip the generator.

Answer / shamshad

First stage only alarm and second stage trip the generator.

Answer / imrakesh

Hi friend i m glad dat u came up with a question like dat .
i appreciate ur indepth study of power system .
well basically the rotor system of altenators are unearthed
due to which the single gound fault at the rotor doesnt
actually disturbs the rotor as there is no fault current ,
however if a second gorund to earth faukt develops then the
short circuit between the windings results as the fault
current gets a path to flow . the former is called the 1st
stage fault while the latter is called the 2nd stage fault.

how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?

0 Answers   BARC,

---

How can calculate thermal overload in relay?

1 Answers   ABB,

---

why the armature coil in dc machine is round?? swagat k.

1 Answers  

---

If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?

0 Answers   Nalco, NTPC,

---

what is bus pt and what is the function of it ???

8 Answers   TATA,

---

battery spicgravity mesuserd?

1 Answers  

---

why neutral grounding transformer is used for generator and why it is not used for transformers?

1 Answers   UPCL,

---

what happens if we connect two parallel ideal voltage sources across resistor?what is current flowing through resistor?

2 Answers  

---

what is the function of fire alarm system?

5 Answers  

---

how much current will take for 1kw power. and what is the eqoutiion which is connecting with kw and A.

2 Answers  

---

define reactive power?

3 Answers   Alstom, TATA, TCS,

---

what is the difference between neutral and earth

0 Answers   LOreal,

---