Anti-Corrosion ACSR

Application
With the anti-corrosion coating painted on the original ACSR surface, the corrosion resistance of the anti-corrosion ACSR has improved. The product is used in areas with bad weather conditions. It can be used in corrosive areas like coastal areas or industrial zones. This ACSR is filled with anti-corrosive grease applied on the gaps between stranded wires and their external surfaces.

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Standard

EN 50182:2001

Annex B

(Normative)

Calculation of Nominal Mass of Grease for Stranded Conductors

B.1 When it is required for bare conductors to be greased in order to reduce the risk of corrosion in some environments, the mass of grease shall be calculated using the methods given in this annex.

B.2 Four cases of grease application are:

Case 1: B.1 (a)

Case 2: Conductor is greased except the outer layer (Figure B.1 (b))

Case 3: Conductor is greased including the outer layer (Figure B.1 (c))

Case 4: Conductor is greased except the outer surface of the wires in the outer layer (Figure B.1 (d))

Steel core only

Other cases may be specified by the purchaser.

Figure B.1 - Application of Grease to Bare Conductors

B.3 Assuming the grease completely fills the voids between the wires, the volume of grease in any given conductor shall be calculated from the following equations:

Case 1: Vg = 0,25 (Ds²- nsds²)

Case 2: Vg = 0,25 { (Do - 2da) ²- (na - no) da²- nsds²}

Case 3: Vg = 0,25 (Do²- nada²- nsds²)

Case 4: Vg = 0,125 no (Do - da) ²sin(360/no) - 0,125 (2na - no - 2)da²- 0,25 nsds²

Where:

Vg is the volume of grease, per unit length, in the conductor.

Do is the external diameter of the conductor.

Ds is the diameter of the steel core.

da is the diameter of the aluminum wire in the outer layer.

ds is the diameter of the steel wire.

na is the number of aluminum wires in the conductor.

no is the number of wires in the outer layer.

ns is the number of steel wires in the conductor.

Since there is a geometric relationship between the parameters of these equations, it is possible to express the total mass of grease in a conductor with the following relation:

Mg = k da²

Where:

Mg is the mass of grease (kg/km).

K is a factor which depends on the conductor stranding and the grease density and the fill factor (ratio of theoretical volume).

Values of k are given in Table B.1 for the four cases of grease application, a grease density of 0.87g/cm, and a fill factor of 0.8.

Table B.1 - Coefficients k for Mass of Grease

Construction
Bare conductorswith grease.

Package
The anti-corrosion ACSR is packaged in woodendrum,steelwoodendrum,steeldrumorcoil.

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