Answer / shrirang

when the induction motor is run above the synchronous speed
the induction motor feeds active power in the three phase line

Answer / bosky babu

As the Induction motor works on induction principle. that is if we give supply to the stator a voltage is induced in rotor, as the rotor is short circuited a heavy current is flowing thorough the rotor conductor,thus a torque is developed in it and it starts rotating.
Instead of giving supply to stator, if we given the supply to rotor windings by using carbon brushes, we can get the induced voltage in stator.

im electrical engineer, could any one help me for FEWA exam questions please ?

0 Answers  

---

WHAT IS DIFFRENCES DCS & PLC

1 Answers   Essar,

---

What are the different pre-commissioning tests that are performed on the distribution transformer, power cable and switchgear (11kv)?

1 Answers   Hitech, Reliance,

---

whay we transmit power in 3phase no in 4 or 2 or 5......etc?

4 Answers   CCCL,

---

We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

0 Answers  

---

---

Differance between power circuit and control circuit

3 Answers  

---

how is the testing of an REF relay? what are the test REF circuit having?

0 Answers   Siemens,

---

what is ceiling voltage in an exciter?

1 Answers   KEPCO Energy Service Company,

---

hoe to select the cable size in sq mm for certain load?

5 Answers   TCS,

---

can any one explain me the where is the use of plc and scada

4 Answers  

---

why we use CVT (capacitive voltage transformer)in switch yard?

5 Answers  

---

Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.

0 Answers  

---