NOVELTY - The mechanism has an interrupt tumbler (4) rotatably mounted on a shaft (8) between an open position in which the tumbler is in open position and a closed position in which the tumbler is in closed position. A ground disconnect tumbler (2) is rotatably mounted on a shaft (6) between open and closed positions in which the latter tumbler is in open position and a closed position, respectively, where the tumblers (2, 4) are made of a thermoplastic material chosen from a family of polyoxymethylenes e.g. delrin 100(RTM: polyoxymethylene) and delrin100ST(RTM: polyoxymethylene).    USE - Used for controlling a current distribution cell (claimed) e.g. medium voltage cell, and for transporting and distributing high voltage.    ADVANTAGE - The tumblers are made of thermoplastic material, thus requiring less number of additional parts for assembling the tumblers on bearings and permitting to create complex shape tumblers with the material. The material permits the tumblers to be insensitive to surrounding, eliminates the need for providing protection against corrosion, does not produce rusting and jamming of the tumblers, provides good resistance to impacts, reduces matting of the tumblers and reduces clearances of the tumblers. The elastic behavior of the material permits to reduce the risk of rupture of the tumblers and eliminates the need for utilizing elastomer shock absorbers for absorbing residual energy which is not utilized for operating the tumblers. The material permits to avoid the risk of greasing of the tumblers, risk of ageing of grease and deterioration of the tumblers. The material eliminates the need for grease and paint which are utilized for protecting the zones of the tumbler attacked by corrosion phenomenon, thus eliminating the need for maintenance operations. The number of parts is reduced, thus realizing and maintaining the tumblers at low cost. The mechanism permits to realize clip-on zones for assembling of the tumblers, thus reducing the cost for thermoplastic material and implementing the material in a rapid manner. The material permits to reduce the weight of the tumblers, thus reducing the need for a large amount of energy for operating the tumblers.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an interrupt tumbler for a current distribution cell controlling mechanism.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a power part of control mechanism of a current distribution cell.    Ground disconnect tumbler (2)    Interrupt tumbler (4)    Shafts (6, 8)    Spring (14)    Connecting rod (22)