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Classification And Application Of Strain Clamp

Classification and application of Strain clamp


1. inverted bolt type Strain clamp (NLD)


The principle is to fix the conductor by the friction effect of the vertical pressure of the U screw and the wavy line groove of the clamp.

Material: Cast Iron

Scope of application: aluminum twisted wire wrapped on aluminum tape, steel reinforced aluminum conductor (rural power grid, substation, etc.).


2. Bolt type Strain clamp for aluminum alloy (NLL)


The principle is to fix the conductor by the friction effect of the vertical pressure of the U screw and the wavy line groove of the clamp. It has good corrosion resistance.

Material: high strength aluminum alloy casting

Scope of application: aluminum twisted wire wrapped on aluminum tape and steel reinforced aluminum conductor (110kV below main power grid, substation, etc.).


3. wedge type Strain clamp (NE)


The principle is to make the steel strand locked in the clamp online by the wedge force.

Material: Malleable Cast Iron Casting

Scope of application: lightning arrester, wire drawing


4. compression type tension clamp (NY)


Principle: the aluminum pipe and steel anchor is made up. The steel anchor is used to connect and anchored steel core of steel core aluminum stranded wire. Then the aluminum tube is put on the body to make the metal plastic deformation by pressure, so that the wire clip and the wire are integrated as a whole.

Material: steel anchor is forged;

Scope of application: large section steel reinforced aluminum conductor, aluminum alloy stranded wire, expanding conductor, heat-resistant conductor and so on.


4.1 compression type wire clamp for Al core conductors. (NY)

Principle: the steel anchor steel tube only supports the pulling force of the steel core, and all the tension of the wire is borne by the hoop of the steel anchor.


4.2 Compression type tension clamp for aluminum alloy strands(NY)

Principle: aluminum alloy has no steel core, and steel anchor has only hoop without steel pipe. The hoop part is compressed with aluminum tube as a whole to transfer the whole wire tension.


4.3 Compression type tension clamp for aluminum clad steel strands(NY)

Principle: the aluminum clad steel can be connected with the steel tube, and then the pipe is put on the body after the steel pipe is continued. The diversion is borne by the aluminum tube, and the aluminum pipe is basically not subjected to the mechanical load.


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