Answer / sreedarsh

VfD. Variable frequency drives are used to control the speed of induction motors which is the driving force for 90% of the pumps in Industrial application. simply saying the are used to control the flow as per the requirements. the flow may be water, air or gas. A motor running at 50% of full speed capacity has a motor torque of 25% of full speed. In
addition, electricity required to operate the motor at 50% of full speed is 12.5% of the amount
of electricity required if the motor was running at 100% full speed capacity. Thus, reducing
motor speed can significantly reduce the electrical energy consumptio

comparision between ACB and VCB

0 Answers   Lupin,

---

Wat will happen if R-phase of an alternator is connected to B- Phase of AMF panel fed from alternator

4 Answers  

---

Explain working of servo controlled voltage stabilizer.

3 Answers  

---

CT Ratio of a energy meter connection is Red Phase : 100/5A, yello Phase : 50/5A & Blue phase : 100/5 A what is the overall Multiplication factor

0 Answers  

---

PRV (Pressure relief valve) Trip with oil splash outside power transformers

1 Answers   Khan,

---

---

wat will be the pressure maintained inside the transformer?

2 Answers  

---

How does MCB operate without relay..?

10 Answers   Toyota,

---

Explain UPS

1 Answers   Powerica,

---

What is the effect of interchanging core(made of steel) and winding(made of copper) material in case of transformer? Give proper explanation in regard to different losses in transformer.

0 Answers  

---

we want low electricity at lower speed of fan.what we have to do?

5 Answers  

---

what is meant by ceiling voltage, ceiling current?? pl reply asap

4 Answers  

---

how i caculate the cable size for power factor correction unit for example 300kvar

1 Answers  

---