Tension Clamp

  • NLD
  • LJ(TJ)
  • NY\NY-BG
  • NUT

Tension clamps are used to tension conductors and earth wires therefore satisfy the most stringent requirements. There are two basic systems of tension clamps:

1. Detachable clamps, such as wedge-type strain clamps, wedge tension clamp, straight tension clamp,
bolted type tension clamps, and insulated dead end clamp which allow for subsequent adjustment.
2. Non-detachable clamps, such as compression dead-end clamps and tower guy dead end clamp which require absolute matching to the conductor length.

Obviously our design therefore fulfills the following:
The clamps must take up the maximum conductor strain, i.e. they must take up the holding forces stipulated in the regulations, which as a rule lie between 40% and 65% of the ultimate conductor strength.
These requirements do not apply to clamps which are used in switching substations.The components which transmit the compr essive force must be designed so that no unacceptable squeezing of the conductor may take place.
Vibrations of the conductors are dangerous, especially at the conductor entrances of the clamps. Safety requirements can be met by a lightweight construction of the clamp and a trumpet shape of the terminations, gradual increase of conductor compression.
Good corona and radio interference voltage behavior due to rounded shapes.
The short circuit capability is excellent due to a narrow ranged groove which leads to a big contact area.
The connecting parts of the clamps are adjusted to the requirements.
Maximum corrosion resistance is achieved by using a clamp material that matches with that of the conductor, for example a corrosion-resistant alloy for conductors made of aluminum, alloy, etc.
Electrical power losses (eddy current losses) are kept to a minimum by an adequate design.

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