Answer Posted / s.arul

power in DC circuit P = V*I
P = 12*4000
P = 48000 WATTS
so wanted power = 48000 watts
so, required KVA in DG set
KVA = POWER/POWER FACTOR
=48000/0.85
=56470.59 VA
=56.47 KVA
SO,REQUIRED KVA IN DG SET = 57 KVA (APPROX)

which mm cable should be used for 1.hp immersible pump motor for the distance of 330 metres?

1669

---

Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?

1625

---

For electrical designers what are the standard should know? i want learn about this standards. how to get information/reference. anybody help in this regards please.

2079

---

HOW WE CALCULATE CURRENT IF THERE ARE NOT PRESENT ANY AMMETER OR MULTIMMETER??????

1803

---

brief notes on ammeters

1977

---

Can a generator runs after getting 1st stator earth fault.

1357

---

In diesel generator how AVR get voltage to excitation. And basic diagram DG EXCITATION CIRCUIT.

3263

---

what is the concept of directional power?

1961

---

Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1.  H1-H2 = H2-H3 H3-H1 2.  H2-H3 = H3-H1 H1-H2 3.  H3-H1 = H1-H2 H2-H3 For the LV side also: 4.  X1-X0 = X2-X0 X3-X0 5.  X2-X0 = X3-X0 X1-X0 6.  X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0  H2-H0  H3-H0    X0-X1  X0-X2  X0-X3 128.0  119.9  7.2      29.2   13.3   15.8 70.7   128.4  59.2     23.4   22.0   3.6 7.2    120.1  128.1    13.4   29.3   15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?

1809

---

list the type of vfd? wich is sutable for heating kiln?

2003

---

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

1977

---

what is the difference between Power and Distribution transformers ?

2092

---

Is it a better option to procure screw type air compressor rather than reciprocating air compressor?If so, what is the reason?How should we select an air compressor(100 CFM)? Please mention the important parameters of air compressor.

1925

---

Can anyone explain me about the capacitor calculation

2123

---

Draw the line diagram of diffretial relay connected to transformer?

2381

---