INTERMEDIATE LINK COMPENSATING CHANGES OF LENGTH OF HOT WIRE IN OVERHEAD LINE SPAN (VERSIONS), AND OVERHEAD LINE SPAN EQUIPPED WITH SUCH INTERMEDIATE LINK (VERSIONS) Russian patent published in 2011 - IPC H02G7/00 

FIELD: electricity.

SUBSTANCE: as per the first version, intermediate link includes element (13) of variable length and its attachment assemblies (14) to linear overhead line accessories; at that, element (13) is made at least partially from material with shape memory, the temperatures of direct and return martensitic transformations of which are within the range of working temperatures of hot wire (2) of overhead line, and has the possibility of being extended and shortened at direct and return martensitic transformations respectively. As per the second and third versions, intermediate link contains element of variable length and its attachment assemblies to linear accessories. As per the second version, element is made on the basis of tension spring the rigidity of which shall meet two inequations given in the description. As per the third version, spring of element is made at least partially from material with shape memory, the temperatures of martensitic transformations of which are in the range of working temperatures of hot wire (2) of overhead line. At that, rigidities of spring material in austenitic and martensitic conditions shall separately meet two inequations given in the description. According to the invention, in overhead spans the intermediate links are introduced to insulating suspension or a pair of dead-end clamps (6) and (7) installed on hot wire (2) are bound.

EFFECT: higher operating reliability of overhead line owing to reducing the violation risks of restrictions for wire clearance to earth and exceeding the allowable wire strain.

5 cl, 4 dwg