Transmission and distribution Archives

3-wire distribution system, balancer fields are cross-connected in order to A. boost the generated voltage B. balance loads on both sides of the neutral C. make both machine^ run as unloaded motors

equalize voltages on the positive and negative outers

Detailed SolutionIn a D.C. 3-wire distribution system, balancer fields are cross-connected in order to

45. A circuit is disconnected by isolators when

Line is energized

There is no current in the line

Line is on full load

Circuit breaker is not open

Detailed SolutionA circuit is disconnected by isolators when

46. Transmission voltage of ll kV is normally used for distances upto

20 - 25 km

40 - 50 km

60 - 70 km

80 - 100 km

Detailed SolutionTransmission voltage of ll kV is normally used for distances upto

47. On which of the following factors skin effect depends?

Frequency of the current

Size of the conductor

Resistivity of the conductor material

All of the above

Detailed SolutionOn which of the following factors skin effect depends?

48. Electromechanical voltage regulators are generally used in

Reactors

Generators

Transformers

All of the above

Detailed SolutionElectromechanical voltage regulators are generally used in

49. The angular displacement between two interconnected stations is mainly due to

Armature reactance of both alternators

Reactance of the interconnector

Synchronous reactance of both the alternators

All of the above

Detailed SolutionThe angular displacement between two interconnected stations is mainly due to

50. 310 km line is considered as

A long line

A medium line

A short line

Any of the above

Detailed Solution310 km line is considered as

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