Answer Posted / k.prakashchandra

Examine the power triangle.The adjacent side (active power)
divided by hypotenuse( apparent power) is cos of the
angle.If you multiply apparent power by sine of the angle
you get reactive power.

How to Calculate KA Rating of Main LT Panel

1693

---

what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.

3172

---

I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?

3761

---

sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me

1895

---

What is transmittance?

1067

---

What is the meaning of floating point earthing in battery backed systems ?

1963

---

what are the disadvantages in GIS over AIS

2362

---

what is the importance of earthing system on the generators big capacity and small?

1702

---

A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

2450

---

how we decide scurt (disc) of insulator with respect to kv rating

3486

---

what is the carona effects meaning in HT line transmmission system

1939

---

what is automatic voltage regulator?we can control the vlotage by using fuzzy controller in matlab?why we go for fuzzy?

1909

---

What is the criteria for selecting the voltage classes of an AC Induction Motor.The KW rating above/below which ht/lt selection is made may be provided in details.

1600

---

why power not passes in plastic and rubber material

1905

---

How a band pass filter is constructed?

1012

---