Answer / kavidasan.k

the cosin of angle of voltage and current is called p.f.

the connected loads are may be indutance and resitenance
means it will have lagging p.f(e.g.0.75p.f.)that means u
are consuming only 75% of power but u need to pay 100% for
that in this situation we use capacitor banks(capacitor
have leading p.f.)this capacitor bank will reduce that
lagging,so u r power factor will improve to(e.g.0.95)so u
now consuming 95% power for the same cost as u pay before

Answer / srini1990

for ex in x^n line each phase consists of reactance values so
increase the value of reactance is called improving the power factor . according to this the capacitor is connected across the phases it will increase the power factor

What is meant by reset level of the relay?

0 Answers  

---

what is suitable cable for 25 HP motor ? start with VFD ac supply 50 hz

3 Answers   Mac,

---

why HT line voltage is multiple of 11.eg11kva,33kva,132kva

2 Answers   HP,

---

Transformer how to maintaince a check b check c check d check

0 Answers   DIC India,

---

If we want to change a contactor of faulty one what are the conditions want to fullfil

0 Answers   Qatar Shell,

---

I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

0 Answers   Siemens,

---

How will calculate the current rating (withstanding capacity)of alumunium and copper cables?

1 Answers  

---

what is post close & pre close of trip circuit supervision relay in circuit breaker control scheme?

2 Answers   ABB, NEK, Power,

---

how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?

0 Answers   BARC,

---

current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer

0 Answers  

---

directional over current relay when acted & how it works

3 Answers   NCC, ThyssenKrupp,

---

What happens if the capacitive reactance of a transmission line is very high?

5 Answers   ABB, Power Grid,

---