Answer / sreemani84

VFD- Variable Fre. Drive

Normally motor is running in 50 Hz frequency.By using the
VFD we can able to change the frequency. if frquency is
getting reduce means speed of motor also will be reduce. so
we can the save the power

Answer / rohit pareek

vfd means varriable frequency drive also known as
vsd,inverter,vsvf drive means it is a electronics device
based on volt/hz ratio.

f=N*p/120 means if u will varry the frequency the rpm will
also varry. thus P= 1.73*VI COS PHI IF THE device getting
less current the power also dawn and unit also decrease
hence the power will save

Answer / sreemani84

thanks rohit

Answer / rajesh

Above sugestions always acceptable vfd running in respected
to requirement if vary the requirement then only posible to
get power saving unless not possible

Answer / karan

HOW TO VARRY THE FREQUENCY OF THE SUPPLY (230 AC MAINS) ?

Answer / pvp

Power consumption is directly proportional to N3 and
speed is directly proportional to Frequency.

If we reduce 2 to 3 Hz also will give good power saving.

Answer / virendra

Frequency decrese then flux increase & hence current decrese

Why Lighting transformers are used? what will be the current if lightings connected through direct raw power?

1 Answers   BMM,

Hi guys! Plz help me to answer the following questions. 1. What are the types of transmission line energy losses? 2. Why are the VLF are used some types of services? 3. What frequencies are used for reliable beyond the horizon terrestrial communication without repeaters? 4. To permit selection of 1 out 16 equi-probable, what is the number of bitis required? 5. What is the most common modulation used for telegraphy? 6. What is the multiplexing is used to increase the capacity of the optic fiber? Thanks

0 Answers  

why frequency meter is connected in parallel in a circuit?

1 Answers   University of Engineering and Technology,

What is difference between Harmonic and Non harmonic Capacitor Bank?

0 Answers   TATA,

i heard that power factor(PF) is the main concern for industries, if they are maintaining PF around 0.6 they will be fined for that. now the question is, how can they improve the PF ranging between 0.9 to 0.95 which is safe for them i,e escaping from the fine?

5 Answers  

what is the difference between delta delta and star delta connection transformer? why we use delta delta transformer since it need earthing transformer for grounding?

0 Answers  

when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

0 Answers  

identify the components of the tube light and explain how they function???wat is inside the fluroscent tube???how it works???

7 Answers   NTPC, TPL,

Explain what is CBCT.

1 Answers  

how can get electrical "c" licence.i am complited in DEEE.PASSING YEAR OF 1993.WORKING IN PVT COCERN LT LINE.PLEASE ADVISE ME .CELL NO 9994786021

0 Answers  

How to know of any cable size if there are not written on cabl?

0 Answers   APGenco, El Seif,

How do you connect the capacitors on polyphase circuits?

10 Answers   L&T, Transco,