Answer / ram

Pf is the cosine of the angle by which the current leads
voltage ( or vice versa as cos(-th)=cos(th)) .So in order to
find the PF connect an AC power supply , a wattmeter and
ammeter in series with the cap with a voltmeter across it .
The real power measured by the wattmeter divided by
current*Voltage gives the power factor. Ideally the pf is 0
for cap as current leads voltage by 90

Answer / sakthipriya m

Transfomer rating -
KVA rating of the transformer
Voltage rating
Current rating

what is the purpose of using battery in dg sets, please specify in details.

2 Answers   Balco,

---

why so maney smaller size capacitor use instead of single Big size capacitor in apfc panel

1 Answers  

---

how to erect roof control panel?

0 Answers  

---

what is the main parts of DG? how it is working?

3 Answers   Kirloskar,

---

why indian power system having 11.22,33 KV ???

6 Answers   Titan,

---

---

Parts of machine and their discription in details with suitable photo

0 Answers  

---

In all the generators, the excitation supply is DC. What is the significance of DC excitation? What will happen if AC supply is given as excitation supply?

2 Answers  

---

Explain what is use of lockout relay in ht voltage?

0 Answers  

---

What is burden of ct,explain very simple

2 Answers   KSEB,

---

what's float charger and boost charger? why it's used?

2 Answers   APCPDCL, PTCL, Rolls Royce, Siemens,

---

Why and which type of tertiary winding is used in most of the power transformer?

2 Answers  

---

One VFD is possible to connect two motors at the same time?

2 Answers  

---