Answer Posted / habeebm

The KVAR required is:

KVAR=KW(tan@1-tan@2) (where @1=cos-1(p.f1)& @2=cos-1(p.f2)

Therefore,

KVAR=KW {tan[cos-1(p.f1)]-tan[cos-1(p.f2)]}

=KW {tan[cos-1(0.85)]-tan[cos-1(0.99)]}

=KW {tan[31.79]-tan[8.11]}

=KW {0.48}

=1500 {0.48}

=720

Therefore 720 KVAR is required to improve powerfactor from
0.85 to 0.99 for 1500KW load.

NOTE:-
Excuse me if the answer is wrong.

How you will determine the volume of oil in a particular Distribution transformer.

1437

---

what is the function and use of cable differential protection relay?

2394

---

What we mean by vintage of an engine+Generator?

1589

---

design a 3 bit synchronous and asynchronous counter using T- flipflop

1575

---

what is the differebt between ac and dc fuse?

1859

---

---

What is meant by earthhing of a magnetic flow meter and when to use empty pipe detection?

1694

---

Different STANDARDS (BS, IS, IEC etc) gives different informations on CT specification. How they correspons w r t each other (i.e I mean to say BS provides "knee point voltage" but IS does not, then how can i select CT)

1500

---

what is the best transformer oil breakdown voltage?

719

---

How servo stabilizer works.

1633

---

1.What is the range of stator resistance of 3-phase induction motor? 2.Two electrically operated vibro motors are foxed in parallel direction in vibrating feeders. what is the direction of both vibro motors?

1452

---

Why reactors use before incoming of ac vvfd drive?

1368

---

Is a direct shorth ciruit on a branch MCCB in a Low Voltage Switchboard a correct means of tesing the performance for discrimination?

1766

---

Can you please explain creepage distance in detail, for a 6.6kV cable head what must the distance be and how do you determine it?

2334

---

What is the range of the stator resistance of 3 phase induction motor?

1449

---

how we explain parallel paths armature winding?

1456

---