Answer / ssr

VFD Means Variable frequency drives. it is used in heavy industries for controlling motor speed.

Answer / rahul

VFD IS VARIABLE FREQUENCY DRIVE..
it is used for non linear lods machines to avoid torque in
th system like motor compressor etc

Answer / ahmed qasem

VFD is Variable Frequency Drive and it is also called VSD where S means Speed. It is used to control the speed of the motor wherever applicable.

Answer / bhushan20111

VFD(Variable Frequency Drive) which is used in Industrial as well used in any where there is a AC Induction Motor,
Use of VFD is you Can Varry The Speed of Motor using VFD
as per our requirement.

Answer / swapnil mohite

VFD abbrivation also stands for "VARIABLE FREQUECY DRIVE"
and it used for controlling the input supply of motor in
areas where voltage fluctuation happened due to variable
speed of motor. It gives appropriate inpur power to motor
for its smooth operation.

list of tests to be carried out at manufacturers end while purchasing a step up transformer of 11kv to 66kv ,2MVa Capacity.

0 Answers  

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Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million

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Basic laws governing motor and generator

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what is method for testing CT

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If the characteristic Impedance is equal to load Impedance then…… a) voltage will be increased b) power transmission is zero c) …… d) max. power is transmission to load

2 Answers  

whats is the role of power factor in designing a tariff structure?

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