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Electric Power Fittings


Electric Power Fittings


Electric power fittings are metal accessories that connect and combine all kinds of devices in the electric power system, and play a role of transmitting mechanical load, electrical load and some protection.

Classification of electric power fittings

1. Suspension clamps -- they are used to fix the conductor on the insulator string of the linear tower, or hang the lightning conductor on the linear tower, or it can also be used to support the fixing of transposed conductor and tension angle tower jumper on the transposed tower.

2. Strain clamps -- they are used for corner, connection and terminal connection. Spiral aluminum clad steel wire has a very strong tensile strength without concentrated stress, and plays a role of protection and auxiliary vibration reduction for optical cable. The grip strength of the clamp is not less than 95% of the rated tensile strength of the optical cable, which is convenient and fast for installation, reducing the construction cost. It is applicable to ADSS optical cable lines with span ≤ 100m and line angle < 25 °.

3. Coupling fittings--they are used to connect insulators into strings and the connection among fittings with mechanical load. It is used to assemble suspension insulators into strings and hang them on the pole of the tower, and to connect the suspension clamps and tension clamps to the insulator string; the cable fittings are used to connect with towers.

4. Connection fittings-refers to the fittings used for the connection between two wires and can meet the mechanical and electrical performance requirements of the wire. The overhead lines of the transmission lines need to be connected with connecting fittings.

5. Protective fittings--they are used to protect electrical or mechanical properties of various electrical devices or fittings themselves.

6.Cable fittings--they are for connecting, fixing and adjusting the cable from the tower to the ground anchor. The materials are galvanized steel stranded wire, and the wire fittings include wedge-shaped wire clamps, UT-type wire clamps, and double-wire joint plates.

7. Contact fittings--they are used for connecting among wires or terminals of electrical equipment, with the main purpose of transferring electrical loads.

8. Equipment clamps—they are used to connect the bus down conductor to the outlet terminals of electrical equipment (such as transformers, circuit breakers, transformers, disconnectors, wall bushings, etc.)


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