Answer / john

FOR A 1000KVA TRANSFORMER.
PRIMARY VOLTAGE=15000V=15KV
SECONDARY VOLTAGE=480V=.48KV
impedence =5.75%
short circuit current at primary=1000/15*1.73*.0575=670amps.
short circuit current at
secondary=1000/.48*1.73*.0575=20943amps.

Answer / prashant

The basic equation is

P= 1.732VICos(A) WHERE P = load in KW

If in KVA then convert it to KW

KW = KVA * Cos(A)

V=415

well i dnt knw regarding the short ckt selection of MCCB

how to select fuse rating for a 3-phase motor ???

0 Answers  

---

what are the alternator cooling system? how it is represented?

1 Answers  

---

Can HT cable(11kv cable) be used for 415V, 700A requirement.

5 Answers  

---

What happens when reactive power enters a system?

6 Answers  

---

WHAT IS THE MEANING CREEPAGE DISTANCE

1 Answers  

---

In Power Line Communication (PLC) the wave trap is used to block communication signals from entering neighboring lines. My question is this: Why do they allow for different filtering arrangements on these wave traps? Isn't it always going to be a low pass filter since we want the power frequency to go through, and the comm signal blocked?

0 Answers  

---

The loads are connected with phase and ground then why current flow as the loads ?

0 Answers  

---

why the excitation is necessary to produce the reactive power

2 Answers  

---

what is difference between elr and R eartl realy.

0 Answers  

---

Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

0 Answers  

---

what you mean by vector group of a 3 ph transformer

1 Answers  

---

why electron flow is opposite to current flow?

3 Answers  

---