Answer / gunasekaran

if it is 3 phase motor it may be magnetosrictions.
if it is single phase motor torque is pulsating nature so
noise is comming

Answer / k.prakashchandra

If it is inside the starter , check for hold coil( 0 volt) and its accessories

Answer / felixraj

due to manetostriction

what is Over current, earth fault (O/C+E/F) ?

2 Answers  

---

What is the accepted limit to increase the choosen transformer capacity over the load and why ?

2 Answers   Asec,

---

in dc series motor if field wdg is shorted then

0 Answers  

---

why there is a temperature rise at different metal to metal contact at cable lug??suppose cable is aluminium and the lug is copper,than why the temperature rise takes place??

2 Answers   JK Cement,

---

what objective books are good for preparing for PSU's?

3 Answers   NTPC,

---

suppose if oil in transformer is not used than what constructional change you will do,for insulation and cooling?

2 Answers   ABB,

---

defined power system?

3 Answers   Spanco,

---

What is the Efficiency in Electric motor ?

2 Answers  

---

What is the complete procedure of erection of electrical panel in industry

0 Answers   BTM, Imerys,

---

meter ratio is 100/5 CT ratio is 125/5, when the ratios changes i.e., CT ratio is 125/5 meter ratio is 100/5 what is the MF in boths conditions?

1 Answers  

---

What is the difference between MCCB and MCB ?

4 Answers   Siemens,

---

What is the role of the 50 STUB protection at a GIS 400KV substation with SIEMENS protection relays?

0 Answers   Power Plant,

---