Answer Posted / thowsif_emerson_csm team

Calculation of Required Kvar:-

Initial P.f-PFi , Desired P.f-PFd and Real Power of Load in
KW...


KVAR=KW(tanAi-tanAd)

where,

Ai=Cosinverse(PFi) = Initial Power Factor Angle.

Ad=Cosinverse(PFd) = Final Power Factor Angle.

For Example:-

PFi=.85 & PFd=0.9 & Real Load=50 KW

For this required KVAR is 6.7 KVAR....

Earth has zero potential then what would be the neutral potential ?

1435

---

describe the phenomena of vacuum interruption in C.B

1797

---

BRIEFLY EXPLAIN THE STORAGE CLASSES AND THEIR TYPES IN C

2343

---

Why is it prefer to initiate circuit breaker failure by "86" lockout relay not by "94" tripping relay ?!

1804

---

What are two contours of nichols chart?

1101

---

reason of diode failure in alternator

1863

---

In a large office how do we calculate required number of light fittings, assuming fittings are 4x18W or 2x36W fluorescent fitting ?

1883

---

What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?

2669

---

In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

2192

---

how i can calculate the size for fire cable

2029

---

wow to calculate the transformer rating(KVA)

2278

---

how to select rating of HT Panel

1462

---

where can i get vijaya electricals limited in hyderabad interview auestions can u give me the website address plz

2156

---

What is Scheme Test of High Voltage Switchgear. Which tests it includes.

2430

---

What is a surge supressor why its is used in synchronous generators

2022

---