Answer / ganesh ajabe

Firstly to calculate total load in house
then calculate total current
if this current is 5A
else switch can be selected 6A

Answer / prasanna kumar

sfu is called as switch fuse unit.this will be used to
switch on/off a motor or vfd's etc.According to the current
rating of the motor i.e calulated by p=1.732 vi cos0 fuse
rating will be three times of that motor current and the
fuse rating will decide the sfu rating.if fuse is 64A in all
three phases then the sfu will be 64A.

Transformer rating=> 15/20 MVA.Why there are two raings? What should be the rating of the fuse at the secondary if the voltage level is 13.8KV/4.16KV?

1 Answers   Bhel,

---

which VFD is better ( LT or HT)

0 Answers  

---

What will happen if v use DCP Type Fire Exingusher on a Server Chaisis???

1 Answers   Emerson,

---

WHY DOES NEUTRAL DO NOT CARRY EVEN THOUGH IT CARRIES RETURN CURRENT?

3 Answers  

---

What is difference between 220v/50Hz & 120V/60Hz?

8 Answers  

---

---

What is the difference b/w earthing & grounding?

6 Answers  

---

how do you select the ct/pt rating in substation

1 Answers   Apollo, Shreem Electric Ltd, Tata Motors,

---

how does the thyistor work in dc drive?

0 Answers  

---

how to calculate ups and battery rating

2 Answers  

---

How I design capacitor bank for different load.7MW connected load.

3 Answers   Samtel,

---

how many types of ratings are there of transformer

5 Answers   Met Trade,

---

what is the minimum insulation resistance for HT AND LT motor ?

3 Answers  

---