how is positive, negative, zero sequence is happen.. how is effect on 3 phase system

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Hello, im taking an introduction to PLC..and i'm having a hard time on creating a program for 2 lamps blinking alternately with this button characteristics: 1.) One push button (starts upon pressing) 2.) Same push button (when pressed again, will pause the system) 3.) Same push button (when pressed again, will continue the paused system) 4.) Same push button (when pressed within 2 seconds, will shut off the system) Pls..i know this is just a simple problem for you guys..

2 Answers  

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What are the advantages of instrument transformer?

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what do you mean by plant earthing system.

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Electrical Design specifications

1 Answers   Sabic,

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how can i improve the power factor in domestic (230v)

0 Answers   Epcos,

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If we connect a motor and generator together (I mean that the generator gives the motor electricity and the motor gives the generator movement) regardless the losses. Will the generator still generate and the motor still move?

0 Answers   Cap Gemini,

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As Electricity Generates in MW I w'd like to know What are the factors we have to consider regarding the transmission of electricity from generation station to Public uses(230 V)

1 Answers  

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In how we connect watt meter for open & short circuit test of a single phase transformer.

2 Answers   Sail,

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what are the maximum available current, voltage ratings and switching speeds of the power electronic devices thyristor, power mosfet, igbt, and mct?

0 Answers  

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How many battery required for an 3kva online ups with 3 hrs back up with usage of 3 fans,3tube lights

1 Answers  

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what is meant by impedance testing of transformer and why it is used

1 Answers   TATA,

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