Answer / harsh shah

It is a isolator where the three pole phases are aligned
digonally ie. all the pole phases are connected one behind
another so that the jumpering can be done on the bus bar

Answer / nitin

It is the isolater which is operate all three pole one by one and it is use where to be maintained the clearence between the phase.

Answer / dinesh kumar yadav

Tendam isolatar is a type of iso latar in which three phase are alinged to each other in a digonaly when the foult is accure in any eqipment in sub station the it oprated to cuts the suppy of the bus isolatar is known as tendam isolatar.

Answer / k.prakashchandra

In continuation to my reply,I wish to add that the
word 'tandem' as a noun, means a bicycle for two
riders ,one sitting behind another.As adverb means, one
behind another

Answer / k.prakashchandra

It is a double break isolator which isolates both sides and
used in all stations

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