Answer Posted / naresh

Current Transformer is a device used to measure the current
of high value in the lines,by connecting the device in
series with the line.
voltage transformer is also an indicating device which is
used to measure the potential across the line.

Can anybody tell abt concrete encased earthing or grounding?

2065

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A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

2439

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bus bar design conditions and sizing pls tell me quickly

1902

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Atwhat condition reverse power relay will act?

2264

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What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?

2055

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what are the applications of PLC?

1977

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What is the difference between rated and per unit in transformer?

2202

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1891

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How to calculate multiplication factor in kva example 500kva ans pls ?

1961

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Direction of flow of active power and reactive power with logic?

1756

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please send me RRB electrical engineer previous year questions for Sr. Section Engineer

1959

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Earth bits close or open. Which is correct

1952

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What kind of maintenance is conducted for Transformer

2288

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Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.

2104

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Which type of transformer is used for lighting loads?

1138

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