Answer / happy

as we know that our ceiling fans are 1-phase operated. so we have that capacitor for splitting another phase in order to provide enough torque for self starting. So due to that phase splitting, capacitor and coil sounds due to little riple factor... so you need to change the capacitor(condenser) or avoid operating fan on invertor's supply...

Answer / pillay

1)check the bearings
2) something is rubbing on to each other
3) there is a snake in the fan

is dc transformer is possible ?

4 Answers   Jyona Power,

---

why various test are performed on electrical panels & power cables before commissioning on site & what are these test???

0 Answers   Lavasa,

---

What can a fresh(without experience) electrical engineer contribute to NTPC( Or any PSU company) growth?

3 Answers   NTPC,

---

if u give d.c. supply to transformer primary then what happen.&why??????????????

4 Answers   DCS, DRDO, HCL,

---

* Signal transmission in sky wave propagation is due to ? a) Reforction of wave b) Reflection of wave c) Pierus through Inosphere d) None and Reason for this is????

2 Answers  

---

---

What are the types of piano switches?

0 Answers  

---

How to know motor winding is star or delta connected without see the information table and winding connection ?

5 Answers   NTPC,

---

What is YNyn Transformer? and what are the other types in this?

3 Answers  

---

what the principle of sincroscope?how it works?when it needed?

0 Answers  

---

Define corner frequency?

0 Answers  

---

What is the differentional relay...what is the work of this in power Tx. how it is works..

0 Answers   ABB,

---

How to justify this statement ??? "Capacitors in series provide less capacitance but higher voltage breakdown rating for the combination"

0 Answers  

---