what is the std. earthing resistance for 440V system or m/c, 33000/440 Volt substation? What is the std.?

2 Answers  

---

What is VFD, and how its work

5 Answers  

---

How to design constatnt power source with variable current and Voltage.

2 Answers  

---

what is meaning of bus riser

0 Answers   TeamLease,

---

what is -24vDC and how can generate this -24vDC

1 Answers   Blue Star,

---

I need tnpsc AE Electrical question papers

2 Answers   TNPSC Tamil Nadu Public Service Commission,

---

what is power factor? is it good or bad for a system? what will happen if power factor increase or decrease?

4 Answers   Bhel,

---

How does a 3 phase induction motor is started?

3 Answers   IOCL,

---

Define non-touching loop.

0 Answers  

---

sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.

0 Answers  

---

present we are having 0.8pf but I want increase it up to 0.99 so what is the formula for it and how can i calculate?

3 Answers   ABB,

---

What will happen if the 50HZ Transformer is connected with 60HZ power Supply

2 Answers  

---