Answer / mayadhar81

Ups is untruppted power supply means Power is continuous
come from this ups if your main power suppy is on or off.

And then inverter is working after power supply is
gone.then invertor is on .

Answer / dipak thumar

Inverter is a part of UPS. in inverter DC supply is fed
through Battery and Battery is continuously charged through
Rectifier circuit from AC supply. in cace of AC supply is
available, inverter gets DC from Rectifier circuit and when
AC fails, it takes from battery.

HOW DOES THE FAN REGULATOR CONTROLS ITS SPEED

6 Answers  

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We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

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Hello to all, Please someone can send me HPCL ELECTRICAL Engg. Sample papers to me? Its urjent....my email address is.... raviasiapacific@gmail.com

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a distribution transformer(3 phase)supplying 440volt per phase.now suppose one of phase voltage(230volt) becomes zero.what will be the cause ?

3 Answers  

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What aturn on methods of scr?

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FACP Means

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why high current produce in case of transformer when turns are internally gets shorted.

3 Answers   TCS,

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in dc transmission the frequency pi is zero, then how it will transmit communication signal?

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in power station power measuring unit is KW but in transformer is KVA why?

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how does an encoder work???

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Why CBCT rating is 50/1A

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star delta starter single line digram

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