Electrical Conductors
Delhi Test House regularly performs the following tests on the Conductors used in the high voltage electrical transmission network / grid.
- General visual examination as required by the Inspection test plans including Photo documentation of as received and stage wise for all layers of strands.
- Identify the Type & Configuration of the conductors.
- Identify critical areas for further detailed assessment.
- Photo documentation of critical aspects of the conductors with reference to Corrosion, Erosion, Wear, Grease content, etc etc.
- For detailed information on this Visual Inspection test method.
1) Aluminium Conductor Overhead Transmission Purposes
| Testing Parameter | Test Method |
|---|---|
| Material Diameter Of Aluminium & Galvanized Steel Wire | IS 398 (Part 2) Clause. 6.1 & Clause. 8.1.1 IS 398 (Part 2) Table. 3 Sr. No. 1 of Table. 1 & 2 |
| Conductor Resistance At 20ºc | IS 398 (Part 2) Sr. No. 4 of Table. 1 & 2; Clause. 13.6 |
| Breaking Load | IS 398 (Part 2) Sr. No. 5 Table. 1 & 2 |
| Freedom From Defects | IS 398 (Part 2) Clause. 7.1 |
| Lay Ratio Test | IS 398 (Part 2) Clause. 13.8 Clause. 13.5 & Table. 4 |
| Ductility Test | IS 398 (Part 2) Clause. 13.4 |
| Torsion Test | IS 398 (Part 2) Clause. 13.4.1 |
| Elongation | IS 398 (Part 2) Clause. 13.4.2 |
| Wrapping Test Aluminum Wire | IS 398 (Part 2) Clause. 13.5.1 & 13.5.2 |
| Galvanized Steel Wire | |
| Galvanizing Test | IS 398 (Part 2) Clause. 13.7.1 & 13.7.2 |
2) Aluminium Conductor for Overhead Transmission Purposes
| Testing Parameter | Test Method |
|---|---|
| Resistivity Of Conductor | IS 398 (Part 4) Clause. 4.1 |
| Material Diameter | IS 398 (Part 4) Clause. 5.1 & Table. 1 |
| Breaking Load | IS 398 (Part 4) Clause. 5.1 & Table. 1 & Clause. 12.2 |
| Elongation | IS 398 (Part 4) Clause. 12.3 |
| Resistance Test | IS 398 (Part 4) Clause. 5.1 & Table.1 & Clause. 12.1.1, Clause. 12.1.3 & Clause. 12.4 |
| Freedom From Defects | IS 398 (Part 4) Clause. 6.1 |
| Standard Size Wire | IS 398 (Part 4) Clause. 7.1.1 & 7.2.1 & Table. 1&2 |
| Actual Area | IS 398 (Part 4) Clause. 9.1 & Table. 2 |
| Stranding & Size | IS 398 (Part 4) Clause. 9.1 & Table. 2 |
| Approx. Overall Dia | IS 398 (Part 4) Clause. 9.1 & Table. 2 |
| Resistance | IS 398 (Part 4) Clause. 9.1 & Table. 2 |
| Breaking Load | IS 398 (Part 4) Clause. 9.1 & Table. 2 |
| Lay Ratio | IS 398 (Part 4) Clause. 9.2 & Table. 3 |