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Transmission & Distribution

Transmission & Distribution
In a 3 wire dc system, the current in +ve outer is 200 A and in the -ve outer is 100 A. The current in the neutral wire is

100 A
200 A
0 A
300 A

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Transmission & Distribution
In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to

balance loads on both sides of the neutral
equalize voltages on the positive and negative outers
make both machine^ run as unloaded motors
boost the generated voltage

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Transmission & Distribution
By extra high voltage (EHV) we mean voltage

33 kV
Above 220 kV
100 kV
66 kV

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Transmission & Distribution
A lightning arrester is usually located nearer to

Circuit breaker
Transformer
Busbar
isolator

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Transmission & Distribution
The radial system of power distribution is used for

Both short and long distances
None of the listed here
Long distances only
Short distances only

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Transmission & Distribution
In capacitance grading of cables, the dielectric of highest permittivity is

In the middle
Near the core
Farthest away from core
None of the listed here

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