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Answer :

 Sandwich type winding is used in 3 phase shell-type transformer.

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Answer : A shell-type transformer has reduced magnetic leakage.

Answer : Primary winding of a transformer could either be a low voltage or high voltage winding.

Description : State any four characteristics of core type transformer.

Answer : Characteristics of core type transformer: i) It has one window. ii) It has one magnetic circuit. iii) Core surrounds the winding. iv) Average length of core is more. v) Area of cross ... Better cooling for winding. vii) Mechnical strength is comparatively less. viii) Repair and maintenance is easy.

Answer : Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.

Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.