Answer / prmdptl2009

if an AC induction motor is applied with DC voltage,then due
to unavailability of change in flux as in AC,the induction
will not be possible. also in case of dc supply the motor
winding will not be able to withstand for long time and at
last the motor winding will be damaged.

Answer / suresh

if v give AC supply to motor it produce (RMF) rotating
magnetic field & according to principle it will run..
but in DC it will produce (SMF)static magnetic field due to
this the rotor cannot run & stater winding gets heated & burn..

Why there is no provision of breaker in between primary of UAT and generator

1 Answers  

---

Explain the Term in CT Name Plate – Class: 5P10

6 Answers  

---

7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

0 Answers  

---

How does and Earth Fault Relay operates in DG set control panel?

1 Answers   Cummins, University,

---

which motor will u use in refinaries?

1 Answers   IOCL,

---

How to calculate ant test the burden of Current transformer

0 Answers   NTPC,

---

what is hormonics. how it is generated & what are the problem faced by that.

5 Answers   APC,

---

In our factory there is one no. of Series trip HT 6KV OCB. 1. Is it possible to measure CT out put current by 440V Clamp meter? The measurement is required for knowing the exact value of current in CT secondary to set up protection for transformers. 2. plase forward the single line diagram of AMF panel?

1 Answers   HAL,

---

why single induction motor is not self starter?

3 Answers  

---

what is the use of Auto re-closer?

0 Answers  

---

sir i am fresher.can you please tell me how can i get certificate of competency as electrical supervisor.

1 Answers   ONGC,

---

Electrical 'C' license full abbreviation , and full form

0 Answers  

---