purpose
Wedge type wire clamps are suitable for non load bearing connections or branches between overhead insulated aluminum stranded wires or steel core aluminum stranded wires in overhead distribution lines, and are used in conjunction with insulation covers and wire clamps,
Provide insulation protection.
Selection of wire clamps
CWire clampMainly used for T-connection or jumper in non load bearing positions of 20kV overhead insulated wires, aluminum stranded wires, steel core aluminum stranded wires, steel stranded wires, and copper wires in overhead distribution lines. The wire clamp is made of high-strength special aluminum alloy with good conductivity, and the structure adopts a reasonable C-type. When the wire undergoes thermal expansion and contraction, the elasticity of the C-shaped structure ensures a constant and long-lasting contact pressure between the wire clamp and the wire. It remains constant in contact pressure with changes in external environment and load conditions, meeting the requirements for continuous connection.
■ Structural features:
1.Contact performance: The contact surface between the wire clamp and the wire is large, the clamping force is constant, and the DC resistance ratio is between 0.85 and 0.9;
2. Overload capacity: The overload capacity reaches more than twice the rated current;
3. Firm performance: Made of high-strength materials, fastened with stainless steel bolts, the connection is reliable and does not fall off;
4. Thermal cycling performance: Good thermal cycling performance, always operating below a DC resistance ratio of 1;
5. Installation: Easy to install and disassemble, suitable for high-altitude operations;
6. Energy saving performance, made of high-strength special aluminum alloy, with no electromagnetic loss, corrosion resistance, and oxidation resistance.
■ Characteristics of insulation cover:
1.Power frequency withstand voltage: ≥ 30kV withstand voltage for 1 minute without breakdown;
2. Insulation resistance: ≥ 1.0 × 10 1/2
3. Environmental temperature: -30 ℃ to 90 ℃;
4. Climate resistance: Good performance after 1008 hours of artificial climate aging test;
5. Tensile strength: ≥ 200Mpa.
