Answer Posted / simon

440 v =Phase V (R,Y,B)
250 v =Line V (Phase+Ne).

If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?

2146

---

what will be the min and max voltage flow from neutral to earth?

1471

---

sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason

1421

---

HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

1908

---

I want to know Electrical Circuit?

2111

---

The moisture in air will condense at

1112

---

How to use earthing on shipments.

1394

---

what is meant by IGBT how they differ from tyristor ?

2380

---

Ac generato how produce power I need for camplet defination

1689

---

How we can calculate the Amps for the cable Ex:- For 1sqmm wire how many amps we can draw (calculation)

3151

---

Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core

3041

---

what is arc flash and what are the hazards involved

2106

---



2345

---

what should be the acceptrd value of winding resistance for 2.5MVA transformer

2265

---

What are the different types of transformers?

1089

---