Answer / saravanan.p

In AC motor, The important factor is magnetic field between
stator and rotor. In DC, no flex will come. While the motor
energized by DC, the stator winding will act as a conductor
and produce the heat. Hence winding will get damage and it
will loose the insulation strength.

In rotor side, nothing will happen.

what r substations?what r there work?why voltages r incresed and then reduced during distribution of power

0 Answers  

---

Why derating factor os applied on Cables?

0 Answers  

---

How to identify Motor leads in their order coming out from winding without tag (U1, V1, W1 & U2, V2, W2)?

6 Answers   ABB,

---

Can we parallel lise the secondary side of the two similiar transformers with same voltage ration, imp, but with different vector groups.. ( for ex. 11 KV / 6.6KV two trfs but different vector groups can we parallelise both of them ,, what happens if we parallelise them

1 Answers  

---

which element is neglected during fault calculation? a)resistance b)inductance c)capacitance d)reactance

4 Answers  

---

what are the oils used in transformers cooling? n which type transformer is used in power systems?

1 Answers  

---

long form of CT

3 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

---

What is the fundamental cause of transients in power system?

3 Answers  

---

what is the safety of voltage power transformer(2250KVA0

0 Answers   Emerson, Jindal,

---

We have .ht motor which is 60Hz.we run on 50Hz.so that it's speed reduce but we had one prob.that motor winding temp increase up to 135 deg.we want reduce this temp.what to do?we arrange ext.cooling fan but not much effect.we want reduce this temp. Inhouse without affecting much.cost. also don't want reWINDING OF MOTOR?

3 Answers  

---

please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house

1 Answers  

---

why we change the direction of winding in rotor ?how we make the north and south pole?

0 Answers  

---