what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks

1 Answers   ABC,

---

how would you come to know if a transformer is double wound or auto? note that there is no tag. you are given only a multimeter.

5 Answers  

---

In pakistan appliances work on 220v at 50hz and in us appliances work on 110v at 60hz what is basic theory to explain it

1 Answers   SNGPL,

---

I have 320 Kva DG Set his KWh running is 77 , how i can calculate into electrical unit .

2 Answers   Anuj Enterprises, Schneider,

---

1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

0 Answers  

---

what you mean ct ratio? why use 400/5a,200/5a,150/5a ?

1 Answers  

---

Why not implimenting power factor in Diesel generator

6 Answers   HP,

---

What is a diode?

1 Answers  

---

what is difference between MCB & MCCB

1 Answers  

---

what is the significance of per unit impedance ?

7 Answers   HP,

---

how we can use resistance heating for any domestic purpose???

2 Answers  

---

i want to know about torque of slip ring induction motor

1 Answers   Ambuja,

---