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.

Why CTs are connected in star on T/F delta connected winding side & in delta on T/F star connected winding side for T/F differential protection?

2 Answers  

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How to caluculate number of batteries to connect a three phase ups by KVA?

1 Answers  

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defination of reactor

3 Answers  

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Explain the Term in CT Name Plate – Class: 5Ps

3 Answers   Divis Laboratories,

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What happens with squirrel induction machines if the ends of rotor conductors are kept open? Explain

5 Answers  

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what is mean by drives?

0 Answers  

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Differene between KVA and KW.

6 Answers   Bharti,

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why we don't use earthing as neutral?

1 Answers  

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Factory acceptance test. FAT. For 132 kv transmisstion towers what is that meaning and what are the tests commonly companies perform now days.

0 Answers   PKR,

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0 Answers  

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what is entropy?

3 Answers   NTPC,

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What will happen if the interpoles in case of a generator have opposite polarities to that behind it in the direction of rotation ?

1 Answers  

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