What is the use of IGBT in UPS & its working??????????

5 Answers   Reliance,

---

without any theoretical calculations, can u approximately tell the current rating of a motor(above 30hp)working at 415VAC.

7 Answers  

---

without any excitation we can strt any dc or ac moter?

6 Answers   Bhel,

---

our company have 750 kva oil transformer.still we have facing a problem that is when voltage is 11.5 kv coming from HT side then LT-side voltage is 420v or above at tape 1.please give me best solution to decrease the voltage

4 Answers   Gannon Dunkerley,

---

why we measure output of transformer in kva?

1 Answers  

---

what happens if we give 1-ph supply for 3-ph Bridge rectifier...??

2 Answers   Sanelec,

---

Why is reating of t/f in kva but for inverter in kw ?

3 Answers   UPPCL,

---

How to design inductive load for 3 phase 440v and maximum 5 amps for star or delta? Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes.how......n.if thesame motor used what`s it`s sideeefect.

0 Answers  

---

why we use 20 KV, 10KA LA on 22 KV Line

2 Answers  

---

What exactly is meant by harmonics and harmonic current?? and what is skewing with regard to this??

2 Answers  

---

why star 2 delta or delta to star preferred mostly then star to star and delta to delta ?

1 Answers  

---

if 2500 KVA TRANSFORMER CAPACITY.33KV INCOMING HOW ARE AMPEAR PRIMERY SAID

3 Answers   Cipla,

---