Answer / cae

Ladder logic is one of the basic programming language in plc, In general we use electrical wires to do the control circuit of any equipment by connecting stop, start, timers or contactors etc..to control the output. on the same way if we want to control the motor action by PLC, we use ladder logic which is written in plc programme between two vertical lines called phase & neutral or bus bar. where we draw the lines by inserting NC, NO contacts by joining timers or counters or output coils which means a motor or any load which u want to control it.

1.wat is the advantage of induction motor? 2.wat is diffrence between 1-phase and 3-phase induction motor?

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i need to calculate high voltage line power factor daily basics but there is meter reading kwh and kvah while calculating power factor kwh/kvah formula was right. for examble there is point c=13kwh c=1.8 lag c=1.2 lead and c=14.5kvah like that i know that p.f =kwh/kvah but c=1.8lag kvarh and c=1.2lead kvarh points i dont know if u know please reply

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How many losses in generators? how we can reduce them? and also in motors,transformers?

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how many types method in earth testing?

3 Answers   ONGC,

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how to calculate efficiency of voltage and current controlled welding transformer?

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define one ampere?

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Why tripping not occur when the transmission breaks? Doesn't we provide earthfault protection for it?

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how to check the LRS resistance .......................

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MICOM P122 OC/EF RELAY HAVE HARMONIC RESTRAIN OR NOT?

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in small capacitor we use uf( micro farad) and in big quantity we used kvar. i want to know that in 1 kva how much will b uf(micru farad).

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How over load relay works.

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What is the maximum number of swithes that can be connected in series up to down stream point in an LV Distribution system?

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