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In manufacturing of cables, intelligent efforts and standard laid down
operating procedures at each and every stage are followed to achieve
quality for quality end products, control starts from proper design
of the product. All raw materials are selected carefully and only
materials of high quality are used in production. Having done this
stage wise inspection is done to ensure conformity with the
requirements of relevant Indian/international standards where these
apply. |
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Stage
Wise Inspection :- |
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| Wire Drawing |
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Wire diameter
Surface
Shape
Quality of joints in the wire |
| Stranding of Wires |
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Quality of joints in the wire
Compaction of conductor
Shape of Conductor
Dimensions
Resistance of Conductor
Direction of Lay |
| Insulation |
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Dimension over Insulation
Thickness of Insulation
Surface defects |
| Curing |
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Hot set test, Tensile strength & elongation (for XLPE Insulation) |
| Laying Up |
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Sequence of Cores
Direction of lay
Diameter over laid up cores
Circularity |
| Inner Sheath |
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Thickness of Sheath
Diameter over Sheath
Surface Uniformity
Circularity
Porosity |
| Armouring |
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Diameter of Wires/
Dimensions of Strips
Direction of lay
Coverage
Quality of Joints of Wires |
| Outer Sheath |
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Thickness of Sheath
Diameter over Sheath
Tightness of Sheath
Ovality, Eccentricity, Porosity, Embossing |
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TESTS |
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The tests on cables have been classified broadly in four categories as
follows: |
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| Routine Tests: |
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Tests carried out on each Cable to check the requirements which are
likely to vary during production. |
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| Type Tests: |
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Tests carried out to prove conformity with the specification. These are
intended to prove the general qualities and design of a given type of
cable. |
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| Acceptance Tests: |
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Tests carried out on samples taken from a lot for the purpose of
acceptance of the lot. |
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Optional Tests: |
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Special tests to be carried out when required by agreement between the
purchaser and the manufacturer.
Special tests required for FRLS Cables can also be carried out at our
works i.e Halogen gas generation test to IEC-754 (Part-1), Smoke
generation test to ASTMD-2843, Oxygen index test and Temperature index
test to ASTMD-2863, Flammability test to (1) IEC-332-3, Flame resistance
test to IEEE-383.
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