winding wire
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8/8/2019 Winding Wire
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WINDING WIRES Winding wire is an important constituent of practically every type of electrical product. The
variety of winding wires has grown from simple oleoresinous enamel coated to coatings like
polyester, polyesterimide, polyurethane, single and dual coated and also PVC. ERDA is
actively involved in testing, evaluation and investigation of all types of winding wires as wellas raw materials. Relevant R&D activities accompany the regular testing activities.
Test Facilities
Raw materials that are tested include:
1 Polyvinyl Chloride IS:5831, IEC:60540
2 Polyester, polyesterimide,
Polyamideimide, polymide IS:13778, IEC:60851
3 Conductors (Copper and Aluminium) IS:8130, IEC:60228
Testing of the different kinds of winding wires include:
1 Polyvinyl acetal based enamelled wire IS:13730, IEC: 60317
2 Polyester based enamelled wire IS:13730, IEC:60317
3 Polyurethane & Polyvinyl formal based
enamelled wire IS:13730, IEC:60317-2,4 4 Polyvinyl acetal or polyesterimide
based enamelled wire for refrigerant
system
IS:13730, IEC: 60317-8
5 Polyesterimide based winding wire IS: 13730-15, IEC: 60317-156 Polyesterimide based winding wire with
an overcoat of polyamide-mide
IS:13730, IEC:60317 7 Polyvinyl chloride based winding wire IS:8783 8 Glass Fibre wound Varnish treated
enamelled sire IS:13730-31,32
IEC:60317-31,32 Further, the quality of enamelled wires is tested by conducting long term ageing test as per
IEC:60216 and IS: 5825. For enamelled wires determination of tip up temperature by
measuring tan delta at various temperatures after impregnation and accelerated ageing
tests is also done. Infrastructure
y High resistivity meter y Tan delta meter y Ageing ovens y ACDC high voltage testing equipments y Kelvin bridge
8/8/2019 Winding Wire
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y Instron tensile testing machine y Cut through tester y Pin-hole tester y Unidirectional abrasion resistance tester y Thermo gravimetric analyzer y Abrasion resistance, springiness test setups
Certification
The test facilities for winding wires at ERDA are recognised by BIS for its marking scheme and
also accredited by NABL, Govt. of India.
R&D Activities
Projects Completed : y Evaluation of indigenously manufactured copper wires and development of quick
quality control test y Evaluation of enamelled wire/compound compatibility y Comparative evaluation of enamelled Aluminium wire of Aluminium Pechiney and
indigenous enamelled winding wires. y Comparative evaluation of indigenous and imported enamelled winding wires y To recommend a computerised quicker method for thermal class evaluation of insulating
material
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