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

5 Answers   Luminous,

---

when the diameter of the core and cable is doubled, the value of capacitance ?

2 Answers  

---

At the time of 1st charging of transformer, there were huge inrush current, so why at that diffrential relay are not operated? Why?

3 Answers   Adani,

---

What happen when switch yard one pole not tripe when you tripping the breaker

3 Answers   Adani,

---

State magnitude criterion.

0 Answers  

---

How can we do megger test of cable??

2 Answers  

---

what is the simple meaning of harmonics?

4 Answers  

---

what is fundamental difference between voltage and current

5 Answers  

---

surge tank, hrc fuse, earthing transformer, firm power objective type

0 Answers  

---

what is softstarter? explain briefly where it is used?

2 Answers   Essar,

---

What is pole slipping relay? When it is operated?

2 Answers   Aditya Birla,

---

what is a composite error in current transformers, why occurs & in which it will occur i.e, either metering ct/ protection ct

0 Answers  

---