why we store only dc in batteries ?

1 Answers  

---

During the main stator winding insulation testing (phase to ground)of 11kv alternator (Lerysomer) i found 0 and resistance with multimeter and found 20 killo ohm while the power cables are connected both end (Generator & VCB). In VCB PT (Potential transformer) are connected. Please any body explain that method of insulation is correct or not? also describe of PT connections

1 Answers   Private,

---

Why we are using LA Rating 10kA in 66 kv substation

1 Answers   L&T, NMDC,

---

What does the term power factor shows?

0 Answers  

---

what is recovery voltage & transient voltage ?

1 Answers   Bhel,

---

Can anyone please give me the parameters , formula needed to calculate the circuit breakers for building services.Thanks

0 Answers   Bhel,

---

What does the term supermesh means?

0 Answers  

---

Name different types of circuit breakers and their voltage ratings?

11 Answers   NTPC,

---

what is the differents and advantages of Electro magnetics relay and static relay ? what is the numerical relay ? advatages?......

7 Answers   CAT, L&T, TCS,

---

a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

0 Answers  

---

what are the types of control panel used in industries & all electrical purpose ?

4 Answers   HP Tronics, IVRCL,

---

What is the difference between grounding & earthing?

9 Answers  

---