Answer Posted / mostafa

suppose you close c.b and fault happen during closing (
temporary earhtg , breakdown ...) and you still press the
push botton the breaker will reclose in fault agian so
regard for this anti pumping used to prevent reclose

sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.

1875

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what happend to DC shunt motor if its field winding insulation becomes slightly weak? will that motor can run on full load or not explain in detail. thanks

1641

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explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.

2690

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In AC if the direction of current keeps reversing every half cycle, how does it propogate through the transmission lines?

2137

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how can I calculate charging current of cable/overhead conductor? what is roll of voltage in it ?

3672

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what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?

2345

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Explain the advantages and disadvantages of hydropower plant?

1120

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How much minimum insulation required between 11kv/3.3kv transformer windings?

2426

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What are diffrent type of road taxes?

2012

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In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?

2087

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what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?

1890

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Safety of dry type transformer

1957

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A Question Like A Wire Is Wound Whose Resistance Is Some 132. 44647 Ohms. If A Voltage Of 30 mv, 296 Ma Current Is Applied To It What Is The Resistance.

1057

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What is lc oscillator?

1179

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in conventional fan regulators how the current varies with speed?

1984

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