1 Scope
This part of GB/T 1981 gives the general requirements for hot curing impregnating varnishes and includes requirements for certain properties at elevated temperature.
This part is applicable to the hot curing impregnating varnishes.
2 Normative references
The following normative documents contain provisions which, through reference in this part of GB/T 1981, constitute provisions of this part. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply to this part.
GB/T 1981.1-2007 Varnishes used for electrical insulation - Part 1: Definitions and general requirements (IEC 60464-1:1998, IDT)
GB/T 1981.2-2009 Varnishes used for electrical insulation - Part 2: Methods of test (IEC 60464-2:2001, MOD)
GB 3836.3-2000 Electrical apparatus for explosive gas atmospheres - Part 3: Increased safety "e" (eqv IEC 60079-7:1990)
GB/T 6109.5-2008 Enamelled round winding wire - Part 5: Polyesterimide enamelled round copper wire, class 180 (IEC 60317-8:1997, IDT)
GB/T 6109.20-2008 Enamelled round winding wire - Part 20: Polyester or polyesterimide overcoated with polyamide-imide enamelled round copper wire, class 200 (IEC 60317-12:1990, IDT)
GB/T 11028-1999 Test methods for the determination of bond strength of impregnating agents to an enamelled wire substrate (eqv IEC 61033:1991)
IEC 60172:1987 Test procedure for the determination of the temperature index of enamelled winding wires
3 Designation
For the purpose of this part, the varnishes are identified as in Table 1.
Foreword II
1 Scope
2 Normative references
3 Designation
4 Definitions and general requirements
5 Property requirements
