Answer / nur.asidik

you need to consider of breaking capacity too

Answer / matt

Given a system power factor of 0.9, PFC unit of 50kvar we can work out the following

50/0.9 = 56 A real current

56^2 * 50^2 = 75 A apparent current

Cable capacity - 75 * 1.35 = 100 A

Factor of 1.35 used for over rated capacitors as per
industry standards.

Breaker shall be rated at less than the cable capacity but greater than 75A. Increase cable size to suit breaker breaker sizing if required.

Answer / mohan

Amps Per KVAR is between 1.1 to 1.3 Amps

for a 300KVAR panel

the current shall be 130 AMPs(and if the capacitors are
auto swithced , then switching surges need to be considered
hence) * 1.5 Times = 585Amps
The nearest breaker size is 630AMPS

It is preferable to use Capcitor duty contactor for
switching

how dose servo motor works

0 Answers  

---

what is linear elements

1 Answers  

---

can we increase our frequency rate in INDIA?

4 Answers  

---

what is the principle of generator, motor, and transformer and explain the definiton of flemings left hand rule , right hand rule and ohms law

2 Answers   NFCL,

---

Anybody tell me about modbus hex address of l&t trivector meter er300p??I want to read voltage,current,kwh etc via rs485...If anybody have a manual then send on my mail..Brijeshmodi18@gmail.Com

0 Answers  

---

when the PFR (POWER FACTOR REGULATOR)change a step to zero,one of the RCCB will triped off,is it the changing step of this PFR effect the RCCB?

2 Answers  

---

Can we convert off load tap changer transformer to on load tap changer transformer

2 Answers  

---

why and where we use early make & late break contacts in protection?

0 Answers  

---

what is the differance between HT motors And LT MOTORS.

0 Answers   Empire Vitrum Glass, Sappi,

---

Which of the following statements is incorrect?(a) 1N = 1 kgm/s2(b) 1V = 1 J/C(c) 30mA = 0.03A(d) 1 J = 1N/m

1 Answers  

---

75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

0 Answers  

---

why dc series motor has high starting torque

2 Answers  

---