Power Systems
Consider a three phase, 50 Hz, 11 kV distribution system. Each of the conductors is suspended by an insulator string having two identical porcelain insulators. The self capacitance of the insulators is 5 times the shunt capacitance between the link and ground. Find the voltage across the two insulators V1 and V2? (V1 = Voltage of disc nearest to the conductor)

 V1 = 6 kV and V2 = 5 kV
 V1 = 2.89 kV and V2 = 3.46 kV
 V1 = 3.46 kV and V2 = 2.89 kV
 V1 = 5 kV and V2 = 6 kV

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Power Systems
An impulse turbine

 always operates submerged.
  operates by initial complete conversion to kinetic energy.
 makes use of a draft tube.
 is most suited for low head and high discharge power plants.

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