what is meant by real power,active power,reactive power & apprent power ?please explain it?

3 Answers  

---

what is the work of trip circuit supervision relay?

2 Answers   Volkswagen,

---

Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?

0 Answers  

---

in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

0 Answers  

---

What is the difference between short circuit and overload currents?

14 Answers   IIIT,

---

---

watt meter have 4 terminals what there name??? and what theses 4 terminals indicates ?? and why 2 terminals are short circuited??

1 Answers  

---

can we increase our frequency rate in INDIA?

4 Answers  

---

What do you meant by slip power recovery?

1 Answers   PSEB,

---

What is the effect if power factor is above 1 or unity.

15 Answers   NTS,

---

What is majour reason of Electrical Arcing ?

9 Answers   ABB,

---

what is the difference between AC choke (inductor) and DC choke (inductor), working and design point of view?

2 Answers   Electrotherm,

---

what is the difference b/w winding insulation class and winding temperature class?

6 Answers   Bhel, NDPL, NTPC,

---