Answer / mbao richie

simply means the bus rated at that fault level can
withstand the electrical pressure(voltage) for which it is
designated for that period of time

Answer / srikanth

Dear friends,

in the above calculations people consider the % impedence
but they are not calculate the fault impedence to get MVA
of transformer.

Answer / jigar shah

suppose transformer (11 KV/433) is of 1000 KVA & %
impedance is 4 .LT side Fault level can be calculated as
below :

KVA = 1.732 X V X I X Cos Phi - PF assumed : 0.95

LT Rated current (I) = (1000 * 1000)/(1.732*433*0.95)
= 1481 A

Fault current on LT side = FLC * 100/(% impedance)
= 1481 * 100/5
= 29.62 KA

Answer / laxminarayan

suppose transformer (11 KV/433) is of 1000 KVA & %
impedance is 4 .LT side Fault level can be calculated as
below :

KVA = 1.732 X V X I X Cos Phi - PF assumed : 0.95

LT Rated current (I) = (1000 * 1000)/(1.732*433*0.95)
= 1481 A

Fault current on LT side = FLC * 100/(% impedance)
= 1481 * 100/5
= 29.62 KA

Is potential difference materials property ..? if yes tnen how.. explain brifly.

0 Answers  

---

Between educational qualification and practical work experience, give us a brief explanation on your practical experience in your past Endeavour that you performed well to the satisfaction of your past or present employer?

0 Answers  

---

what is the use of the circle diagram

2 Answers  

---

1)what is hypo test. 2) which cable need to hypo test.3) when hypo test can be done before or after glanding.4) what is the purpose of hypo test.

5 Answers  

---

Why motor initial starting current is high?

9 Answers   Pennar,

---

What will happen if the oil level in the buchholz realy of a transformer gets down?

3 Answers  

---

How to design power source say 5KW i/p :415v 3 ph, o/p 5KW constant, variable currnt and variable volatge 10-230v,

2 Answers  

---

How does the slip regulator works as a startor

0 Answers  

---

i have a Connected Load of 280KW and Maximum Demand of 224KW to one of SMDB under design with me. which criteria should i consider to design panel and main cables connected Load or Maximum Demand 1)Breaker rating 2)Panel Busbar rating 2)Incommer cable sizing (ignore Voltage drop)

1 Answers  

---

What is an Isolation Transformer? Where it will use?

3 Answers  

---

which circuit breaker enclosure is best for maintenance guy? 16 bolt & 20 bolt squre or 16,20 bolt hinge

2 Answers  

---

why a pilot exciter is used in combination with the main exciter? why not only a main exciter is used for excitation to an alternator?

1 Answers   Electrical,

---