Answer / rabi

Ac-1 contactor is used for "Non-inductive or slightly
inductive loads, resistance furnaces".

Ac-3-contactor is used "Squirrel-cage motors: starting,
switching off motors during run-ning."

why an ac solenoid valve attract the plunger eventhough we interchanges the terminal?will the ploes changes?

1 Answers  

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what is specific gravity of a battery if specific gravity increase/decrease,what will happen to the voltage/current of the battery

5 Answers   NTPC,

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DIFFERANCE BETWEEN function of ELCB? function of rccb? function of mccb? function of acb? function of mcb?

4 Answers   MacAir, Sajas,

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what is the transiant condition in alternator? and how it can be prevanted?

0 Answers  

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When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

0 Answers   TATA,

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How transformer neutralshould earthed ? Transformer neutral connected to earth mat in substations, right or wrong ?

4 Answers  

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List some examples of renewable energy?

0 Answers  

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Define resonant peak?

0 Answers  

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What are the different types of LT Cables?

0 Answers   Nabard,

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What is the Relation b/w star delta starter , DOL starter and two speed starter. if we want to rotate a 20 kw fan in 2 speeds which type of two speed starter we have 2 use?

1 Answers   ABB,

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what is the physical connection of a analog i/p to a analog i/p module (ab plc)and through a analog o/p module(ab plc) to a analog o/p . and how all the process control by scada

0 Answers  

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why we use 11 kv 22 kv and so on ?

1 Answers   Air Force,

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