is there any role of power factor with frequency variation? and how we can manage the frequency variation?

0 Answers   Wipro,

---

if installing the transformer why put the sprit the stone ?

1 Answers  

---

how to check the insulation for motor using megger?

2 Answers   GSK,

---

hi i am aziz electrical associate engineer. i am faceing problem in acs800 vvvf drive.it is tripping wothout any alarm/fault.i cheaked all parameters and fault function of drive, all are correct as well as communication parameters.but still it is tripping (drive is tripping in running position not in starting)

1 Answers  

---

what is the distance b/w EHV lines? 1.8m 2.11m 3.4m 4.14m

7 Answers   HAL,

---

How to calculate transformer capacity requirement for a project site?

5 Answers   ABB,

---

Why single core cable required bonding at double end.

1 Answers  

---

AVR is used for the Voltage regulation of the Generator using the feedback signal by exciting the field winding of the generator.But how the field winding will be excited & using what?

2 Answers   Alstom,

---

What are the methods/types of distance protection schemes used in transmission system?

2 Answers  

---

why the earth pin is thicker than other pins in a plug? If it is for reducing resistance, then why the copper earth wire is not so thick as earth pin of socket?

5 Answers   Omax,

---

How can you start-up the 40w tube lite with 230v AC/DC without using any choke/Coil?

2 Answers  

---

in transformer input is d.c signal which type of emf is induced

1 Answers  

---