Answer / mangulusamal

In my practical knowladge motor running very slow and more humming sound come because rotor resistence is high to stater resistence ,if you have running extra more time see smoke observed.Connected links as a fuse link ,mcc,mccb, protection circuits tripped.....

Answer / surender kumar singh

Slipring induction is being apply in industries where speed variation is needful as in flour mills,saw ,grinding ,stone crushing etc.
In fact it's speed variation is to be achieved by changing the desired values of external resistance in rotor circuit.

Principally Motor is a rotating transformer and it will behave as an primary open circuit transformer and some volts will produce at the motor stator side.

Production of heat will be depend resistance connected in rotor circuit.

Regards

In Designing the rating & accessories of a MCCB how to choose the type of releases..means what is the basis for selecting, thermal magnetic, electromagnetic & microprocessr based releases

0 Answers  

---

I am in last year of Engineering.I want to apply for ONGC on GATE based score.They require Certificate of Competency as Electrical Supervisor.How can i get this certificate so I can apply for AEE(ELECTRICAL) in 2016

1 Answers   ONGC,

---

For DG set,if the loading is increased,does flue gas temperature increases or not?

2 Answers   NTPC,

---

why core is useful for a transformer ?and also in its operation ?

0 Answers  

---

How to determine the breaking capacity such as break down current and break down voltage for VCB and CT's.

0 Answers  

---

WHAT IS THE DIFFERENCE BETWEEN A DC MACHINE OUTPUT AND RECTIFIER OUTPUT...

3 Answers   Cesco, NTPC, RRB,

---

What is different between hypo test and megger test

2 Answers   ABB,

---

X is a uniformly distributed random variable that takes values betweeen 0 and 1.The value of E {X3}(x cube) will be.

1 Answers   GATE,

---

Where there is voltage,there must be current.Is this right or wrong??

10 Answers  

---

If VFD is On but no starting commond on it. so how many outpout voltages of VFD

0 Answers  

---

What is the use of oil in transformers?

0 Answers  

---

in thermal overload relay class 10A indicate what

6 Answers   Reliance,

---