Answer Posted / krishna sai

with the increase in the frequency by keeping the kva rating of the machine constant then the size of the machine can be reduced.
on the other hand during the design stage if the frequency is increased then the KVA rating of the machine will be increased as KVA proportional to EI where E(induced voltage) is proportional to f. Power supply voltage range must be decreased along with the increase in frequency so that the machine will be safe without getting into saturation

What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?

2030

---

Why we used 690V in ACS 800 drives.Why dont use standard voltage like 415v or 1.1Kv

2448

---

What is the efficiency during maximum power transfer?

1222

---

working principle of AC Servo Motor with its construction

8872

---

Explain the purpose of inductor in an electric circuit?

1129

---

can anyone give an idea about dia calculation in cold rolling mill

1642

---

Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction

2941

---

AL=0B9H,bl=75H, ADD AL,BL AL=____________? CF________? OF___________?

2666

---

rajha power sector details

2019

---

what are the difference between PLC and embedded

2141

---

physical identification of HT & LT panel

1670

---

Why star delta starter is preferred with induction motor?

1105

---

how is the cable tray designed & how its total length is calculated for an Industrial plant Say for Ex. (500KW Motor Load)

1890

---

what are the maximum available current, voltage ratings and switching speeds of the power electronic devices thyristor, power mosfet, igbt, and mct?

2094

---

Can we put 3 layers of cable tray while installing tray

2391

---