Answer / guest

Example:Calculation of the kVAR rating for 1750kW Motor

Motor Data:
Rating of Motor: 1750kW
System voltage: 6.6kV
Power factor of the motor when running at 75% of full
load : 0.84

(Power factor of the motor is considered at 75% of full
load, assuming that the motor will be loaded at an average
of 75%)

Target Power factor : 0.95 lag ( To improve the power
factor from 0.84 to 0.95, after adding the capacitor bank
in the motor circuit)

Required kVAR of the Capacitor Bank to
achieve the target power factor.

KVAr = KW ((TanQ1- TanQ2)

where
Q1= Cosinsverse(P.F1)Initial Power Factor Angle
Q2= Cosinsverse(P.F2)Target Power Factor Angle

So, required kVAR
=0.75*1750*(tan (cos-1 (0.84)) - tan (cos-1 (0.95)))

= 416kVAR

Answer / ashok chodankar

Same as calculated above

Answer / balamurugan.r

presen load and pf

what is impedence (Z) of transformer, what indicate in transformer , which perameter indicate in transformer

5 Answers   CTS, Suzlon,

---

I need bhel previous year quetion papers for electrical engineering department.I searched but i could not find out

0 Answers  

---

what is meant by impedance testing of transformer and why it is used

1 Answers   TATA,

---

What is the role of power pack in substation protection system?

0 Answers   Facor,

---

what is the minimum requirement gigaohms for the insulation test using 5kv in 300mm xlpe cable

0 Answers  

---

how to select the isolation tranformer for siemens 802dsl cnotroller

0 Answers   Siemens,

---

please send the last 5 years {{{JUNIOR ENGINEER - ELECTICAL, ELECTRONICS RRB CHENNAI and secundrabad}}} TECHNICAL question papers TO MY EMAIL ID dinesh100701@gmail.com

0 Answers  

---

How to calculate flow of water delivered by pump when pressure & size of pipe line is given

0 Answers   Knight Frank,

---

how we can do the insulation on secondary of ct explain and so that tan delta will within limit

0 Answers  

---

what happens when one of the phases out 0f 3 phases been removed under working condition and no load condition will the machine run if so plz send me why

2 Answers  

---

How to take Vector group test of Transformer?

16 Answers   Sunflag Steel, Zuari Cements,

---

why core of transformer in square or rectangular why not in circle or ellipse if this what happens

2 Answers  

---