Answer / k.prakashchandra

The existing pf is not given.Use the formula KVA2=KW2+KVAR2
and KW/KVA=pf

Answer / n.sinha

The calculation we follow is :-
(kva)2 = (kw)2 + (kvar)2
and the P.F is given as 0.9,
so, kw = kva * P.F
= 2000 * 0.9
= 1800
And, kvar = {(kva)2 - (kw)2}1/2
= {(4000000) - (3240000)}1/2
= {760000}1/2
= 871.78

a room heater is connected in serise with a 100w bulb.if the 100w bulb is replaced by a 40w bulb then the output of the heater is increase/decrease/remain same?

9 Answers   College School Exams Tests,

---

why surge protectetor work explain with the help of circut diagram?

0 Answers  

---

What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

17 Answers   Alstom, Call Centre, EDC, HCL, Procon Engineers,

---

i am BSEE student, my project study is to synchronize the generator of an hospital, it have a one 313KVA standby-power diesel gen.,and three 100kva transformer.The generator system is operated manually and no ATS or UPS. one more new building is being build so the transformer will be upgrade to a higher vale. 1)how i can connect the new gen. to the old gen. and to the synchronize panel? 2)what is the new gen. to be buy?(rating, etc.) These is my title: To synchronize the generator system of the ____ Hospital. Anyone have a good title? Thanks.

1 Answers  

---

we have 3*1 MW generator one NGR is common for all it will be selected during paralle our problem is two generator ca be paralled but when slecting third one we need to close NGR selection on third one other wise voltage not matching why?

1 Answers  

---

for a 400kv t/m line with 10 ampere current will corona occur?

0 Answers   NPCIL,

---

What is Surge Capacitor? Why it is use in Generator Circuit Breaker?

0 Answers   TCS,

---

what is the difference between upper impedance and lower impedance distance relay?

3 Answers   Havells, Power Grid,

---

Is it any dc fuses availbale in market? can we use one fuse for both AC & DC ?

6 Answers  

---

Explain the term parallel path in dc machin ?

0 Answers   UPSC,

---

how we could know that generator running anti clockwise with seeing the rotating direction of prime mover or engine

1 Answers  

---

What is the name of powder which is used in inner side of a cable? and purpose?

1 Answers  

---