Answer / rahul faye

A variable-frequency drive (VVVFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor. A variable frequency drive is a specific type of adjustable-speed drive. Variable-frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives or inverter drives

Answer / saravananp

In Electrical:- VFD(Variable Frequency Drive). This is used to monitoring and controlling the speed of the driven based on the variation of frequency.

In Mechanical:- This is used to control the flow of air within the duct in terms of CFM(Cubic foot Metre).

we can use airconditioner for cooling the winding of transformer ,if not why?

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what is the working of ups.

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what is ATS?and its function or operation in power system with its layout.

1 Answers   DLF,

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sir, in a industry present pf is 0.54 pf 25hp power is there its want improve 0.9 pf. which suitable capacity capacitor is suitable please inform me.

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WHY THE TRANSFORMER VALUE MEASURES IN KVA INSTEAD OF KW.

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what are the type of motors

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what is transformer?

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What is the need for a controller?

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how to design the heater in temperature control unit to heat 50KL of water?

0 Answers   SunMax,

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What is the application of Dyn1 and Dyn11 vector group of transformer?

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what is the full name of ELCB &MDB <MCB

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Hello everyone, somebody knows what is a "surplice power" ? The hole phrase is: "This rating is appropriate for a generator set paralleled with an infinite bus e.g. a national electrical supply network or grid where the generator set is run at 100% load, 24 hours a day, 365 days a year and any surplice power is exported into the grid" Thanks in advance.

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