when we connect a ceiling fan to a inverter's output voltage, it give some noise, why?

5 Answers   Luminous,

---

What is the use of iron core in a transformer?

0 Answers  

---

1.Can anybody explain Why starters are not used for motor starting in industries? 2.

7 Answers  

---

will a bulb glow connected to two phases of a delta connection?

6 Answers  

---

DEAR ALL I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm but new local pwer is 220v 60 hz requierd rpm should be 1000 pleas what the beast solution is used frequncy converter or rewinding all motos or chang all motors thanks

6 Answers   GE,

---

---

when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

3 Answers  

---

derive the formula of amp hours is calculated for 12v battery.where no. of plates is given

1 Answers  

---

Why field rheostat is kept in minimum position?

0 Answers  

---

what is power factor?

3 Answers  

---

method to check earthing

5 Answers   ECC,

---

Sir, I have applied for the of Assistant.engineer of NPDCL. please send me all AP TRANSCO AND JENCO solved papers of previous exams . I requested send me the papers to my id as soon as possible (rajanikanth_peddi@yahoo.co.in) (This is very urgent) Thank You,

0 Answers   APTransco,

---

What is partial discharge in power cable?

1 Answers  

---