what are the main parts of UPS what is the function of that?

23 Answers   Apollo, HCL, Liebert, Royal Furnishers, Tech Mahindra,

---

respected sir, sir recentely i have applied for chennai and tiruvananthapur section enggineer and juniour engg in electrical dept. but still i donot get how i have to syart my preparation and also t the same time i donot know exactly what they r going to give in the examinations i mean which sections they r going to give i donot know exactly, can u prefer whichh books i have to follow and model papers or both boards

1 Answers  

---

my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

1 Answers  

---

what is cathodic protection in Tank,and product pipelines?

4 Answers   IOCL,

---

what is gapless metal oxide techniques?

1 Answers  

---

What is complex power?

1 Answers   DRDO,

---

what is the principle of synchronous motors?

3 Answers   The Grand,

---

how to define that what is resister ,capacitor& inductor.

1 Answers  

---

Hello friends., my question is related to testing of current transformer... A Ct having knee point voltage of 750 volts., and I have two step up transformer's of rating 230 v to 440 volts., can I obtain the value of 750 volts by using the two transformer's.... If yes then how could I connect the transformer's to obtain knee point voltage?? thank you in advance

1 Answers   ABB,

---

how we could know that generator running anti clockwise with seeing the rotating direction of prime mover or engine

1 Answers  

---

Write down the name of 2 lady Bir Pratin of Bangladesh

0 Answers  

---

What is the need of motor starter?

6 Answers  

---