This part of IEC 60851 specifies the following tests:
- Test 12: Resistance to solvents;
- Test 16: Resistance to refrigerants;
- Test 17: Solderability;
- Test 20: Resistance to transformer oil.
For definitions, general notes on methods of test and the complete series of methods of test for winding wires see IEC 60851-1.
IEC 60851-4:1997 Referenced Document
IEC 60296:1982 Specification for unused mineral insulating oils for transformers and switchgear
IEC 60554-1:1977 Specification for cellulosic papers for electrical purposes. Part 1 : Definitions and general requirements