Wire Enamels

Application Guide

  • Terebec TR 543-38 + AI 1013 BV /....

    Product Profile - Terebec TR 543-38 + AI 1013 BV /....

    Base Coat + Top Coat Terebec TR 543-38 + AI 1013 BV /....
    Characteristics High tan delta
    Recommended For Wire Size Up to 1.6 mm dia.
    Conforming To IS 13730-13
    IEC 60317-13


  • Isomid 860/35 LYC + AI 1013 BV / ....

    Product Profile - Isomid 860/35 LYC + AI 1013 BV / ....

    Base Coat + Top Coat Isomid 860/35 LYC + AI 1013 BV / ....
    Characteristics Suitable for high speed machines of >100 v x d
    Recommended For Wire Size Up to 1.000 mm
    Conforming To IS 13730-13
    IEC 60317-13


  • Terebec MT533-36PA + AI 1013 BV/....

    Product Profile - Terebec MT533-36PA + AI 1013 BV/....

    Base Coat + Top Coat Terebec MT533-36PA + AI 1013 BV/....
    Characteristics Improved flexibility
    Recommended For Wire Size For thick round wires > 1.6 mm dia. & rectangular wires
    Conforming To IS 13730-13
    IEC 60317-13
    IS 13730-28
    IEC 60317-28


  • Terebec SL225-40A + AI 1013 BV / ....

    Product Profile - Terebec SL225-40A + AI 1013 BV / ....

    Base Coat + Top Coat Terebec SL225-40A + AI 1013 BV / ....
    Characteristics Economical
    Recommended For Wire Size 0.315 to 3.000 mm dia.
    Conforming To IS 13730-13
    IEC 60317-13


  • Terebec SL 225-40A + 910 Nylon

    Product Profile - Terebec SL 225-40A + 910 Nylon

    Base Coat + Top Coat Terebec SL 225-40A + 910 Nylon
    Characteristics Low coefficient of friction for high speed winding machines
    Recommended For Wire Size 0.315 to 1.6 mm dia.
    Conforming To NEMA MW 1000, 24 C


  • Isomid 860/35 LYC + 506 Bondall

    Product Profile - Isomid 860/35 LYC + 506 Bondall

    Base Coat + Top Coat Isomid 860/35 LYC + 506 Bondall
    Characteristics Bondable, for T V Deflection coils etc.
    Recommended For Wire Size 0.08 to 1.5 mm dia.
    Conforming To IEC 60317-37


Application Note: Wire Enamels and Binder Varnishes

  1. General

    The winding wire insulation is undoubtedly the most important insulating material used in the insulation system of an electrical machine. Winding wire insulation widely used are enamel, glass-fibre covering, paper covering, film covering (Polyimide, Polyester, etc.) and their combinations. Being closest to the current carrying conductor, its properties decisively influence the performance, reliability & life of electrical machine.

  2. Wire Enamel as insulation & its application

    Thin film of wire enamel on conductor provides high dielectric strength coupled with thermal, mechanical and chemical resistance. Wire enamel are classified based on either (a) Chemical base, such as Polyester, Polyesterimide, Polyamide-imide, Polyurethane, etc. or (b) Thermal rating of the wire, such as Class 155, Class 200 etc. Both round and Rectangular enamelled wires are manufactured on enamelling machines in which the wire enamel is applied on annealed conductor in multicoat system. The thin film of wire enamel is cured in oven at high temperature 4500-7000C.

    Horizontal Enamelling Machine

    Generally finer wire sizes (up to 0.5 mm dia) are processed on horizontal enamelling machine. The enamel wiping is felt or Die.

    Vertical Enamelling Machine

    Larger wire sizes generally above 0.5 mm dia are processed on vertical enamelling machines. The wire enamel wiping is dies. Dual coat and triple coat application is widely used to combine the best properties of two or three wire enamel coating. Rectangular wires, are also manufactured on vertical enamelling machines.

  3. Glass-Fibre covering with Binder varnishes

    ELANTAS Beck Insulation system offers a wide range of binder varnishes manufacture of class 155 to 200 insulated wire with glass-fibre covering. Binder varnishes based on Polyurethane Polyesterimide, Epoxy and Silicone are available. The application of binder varnishes is done on horizontal glass-fibre covering, varnishing and curing plant as shown here

    For further details please contact our Technical Services department, eMail id: shirish.gokhale@altana.com

UL Approvals

UL File # Product Chemical base Temperature
Index (TI)
E135382
[File No. / E73276		 Terebec SL 225®..
Allotherm 602 L		 Polyster
Polyamide-imide		 220
Terebec TR 543®..
Allotherm 602 L ..		 Polyesterimide
Polyamide-imide		 220
Terebec 533/.. L Polyesterimide 200
Terebec 533/.. L®
Allotherm 602 L ..		 Polyesterimide
Polyamide-imide		 200
Terebec MT 533 .. Polyesterimide 200
Terebec HD 533 .. Modified
Polyesterimide		 180
Terebec MT 533 ®..
Allotherm 602 L ..		 Polyesterimide
Polyamide-imide		 220
Terebec SL 225-.. ®..
Decklack OC 240-..		 Polyester Nylon 180
AI 1013 BV35 Polyamide imide -
Isomelt 1566M30 Polyurethane 155