Answer / ll.krishna rao

V=4.44fNBA Therefore V is proportional to frequency if you want not to exceed the design parameter of flux density.If you operate a motor at 50Hz instead of its rated 60 Hz,then you will be exceeding the flux density by 120% for 380 v
operation.I suggest you to operate the motor at 380/1.2 volts instead at the expense of full power.

why earthing point in the 6amps/16amps socket bigger than the remaining (Phase & Neutral)points.

1 Answers  

---

how to calculate the no. of earth pits required for an electrical installation?

1 Answers   Mepax,

---

How can step up and step down process in power transformer

1 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

---

Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?

0 Answers  

---

which calss ct's,pt', use protection,meatering and others

1 Answers  

---

what is mcb

7 Answers   L&T,

---

How many types oil using in transformer ? How many letars using in transformer..?

0 Answers   TATA,

---

Different types of relay fault which phase sequence??

0 Answers  

---

what is the significance of KV & MVA rating of the transformer and how they are related.

8 Answers  

---

what is the function of AVR in generator? how the generator maintain the frequency while varies the load?

1 Answers  

---

1 KVAR = 1.3Amps but, 25KVAR capacitor/690V capacitor takes just 21Amps as leading current, what is the reason? Please explain...

1 Answers  

---

Pls say , how we calculate lux / sq.ft, which formula used for calculation

5 Answers  

---