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1.
SF6 is used in transformers cooling and it is better than oil
2.
An AC induction motor with 1500 RPM has number of poles greater than a 3000 RPM one
3.
3 phase motors need starting capacitor to start its rotation
4.
ONAN cooling system in transformers is better than ONAF cooling system
5.
Blue silica gel could be reactivated after adsorption with humidity by adding ethelyn to it
