This part of GB/T 7095 specifies the requirements of enamelled rectangular copper winding wire of class 120 with a sole coating based on polyvinyl acetal resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements.
Note: A modified resin is a resin that has undergone a chemical change, or contains one or more additives to enhance certain performance or application characteristics.
Class 120 is a thermal class that requires a minimum temperature index of 120 and a heat shock temperature of at least 155℃.
The temperature in degrees Celsius corresponding to the temperature index is not necessarily that at which it is recommended that the wire be operated and this will depend on many factors, including the type of equipment involved.
The range of nominal conductor dimensions covered by this part is as follows:
- Width: minimum 2.00 mm; maximum 16.00 mm;
- Thickness: minimum 0.80 mm; maximum 5.60 mm.
Wires of grade 1 and grade 2 are included in this part and apply to the complete range of conductors.
The specified combinations of width and thickness as well as the specified ratio width/thickness are given in GB/T 7095.1-2008.
Foreword I
1 Scope
2 Normative References
3 Definitions and General Notes on Methods of Test and Appearance
4 Dimensions
5 Electrical Resistance
6 Elongation
7 Springiness
8 Flexibility and Adherence
9 Heat Shock
10 Cut-through
11 Resistance to Abrasion
12 Resistance to Solvents
13 Breakdown Voltage
14 Continuity of Insulation
15 Temperature Index
16 Resistance to Refrigerants
17 Solderability
18 Heat or Solvent Bonding
19 Dielectric Dissipation Factor
20 Resistance to Transformer Oil
21 Loss of Mass
23 Pin Hole Test
30 Packaging
