Answer / guest

Transformer EMF equation = 4.44 x Phi x f x N volts.
for same operating voltage if frequency is to be decrease then Phi must be increase.

Now Phi = Bm x A, where A is the Area of Iron Core
so it is clear that on decreasing frequency size of the transformer must be increase.

If load is 240 kw & pf is 0.8 lagging, than how to increase it from0.8 to 1.0(unit),which rating capacitor used, please give me Calculation. What is effact of consumer & suplier if pf is lagging or leading with on effect machines/ TF/GE etc.

6 Answers   L&T,

---

how does a current carrying conductor posess a magnetic field. what is the reason for the production of electro magnetic field around the conductor

2 Answers   Vizag Steel,

---

What would be the steps and parameters in case if a fault occurs in transmission line at a distance far from the generating station?

0 Answers  

---

what phase and neutral.

3 Answers   HP,

---

How to calulate Locked rotor amper(LRA) for compressor type motors?

0 Answers   MAF Dalkia,

---

Why Aluminium wires are used for High tension(HT) lines? 11 KVA/32KVA & aboue

6 Answers  

---

In a panel 2500A ACB is the incoming breaker then what is the size of the bus bar?

1 Answers  

---

Why Ac Systems Are Preferred Over Dc Systems?

0 Answers   ABB,

---

What is ZCT? it operating principle and how is work with RCCB (residual current circuit breaker)?

4 Answers  

---

Why is the generator rating always in kVA and motor rating in kW?

7 Answers  

---

Why substation battery room is coulered black?

1 Answers  

---

WHAT IS MEANT BY OVER EXCITATION IN GENERATOR TRANSFORMERS? DESCRIBE IT.

0 Answers  

---