Answer / guest

1. pwer distri
operational near full load charachs near no load
structural mostly delta delta delta star(neutral grounded).

2 .skewing is done on rotor to prevent magnetic locking btween rotor and stator also done to reduce noise and harmonics

3 4 6 .can be found on net
5. trays,direct burial in ground,trenches etc(next question followed on why petrochems dont use direct burial in ground tech-ans chemicals eat away insulation)

7.v proportional 4.44 phi f n
v n f only variables rest constant
if change v alone to higher value,to maintain constant flux f changes to lower value so ratio v/f is changed n not alone v or f

8.10^-6 to 10^-8 torr used mostly inremote area due to practically low maintain and high reliable


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