IEC 61857-1:2008 PDF

Scope: This part of IEC 61857 specifies a general test procedure for the thermal evaluation and qualification of electrical insulation systems (ELS) and establishes a procedure that compares the performance of a candidate ElS to that of a reference ElS. This standard is applicable to existing or proposed ElS used in electrotechnical products with an input voltage of up to 1 000 V where the thermal factor is the dominating ageing factor.

IEC 61857-1:2008 Referenced Document

IEC 60085:2004 Electrical insulation - Thermal classification
IEC 60216-4-1 Electrical insulating materials - Thermal endurance properties - Part 4-1: Ageing ovens - Single-chamber ovens
IEC 60216-5 Electrical insulating materials - Thermal endurance properties - Part 5: Determination of relative temperature index (RTI) of an insulating material*， 2022-11-18 Update
IEC 60493-1 Guide for the statistical analysis of ageing test data - Part 1: Methods based on mean values of normally distributed test results*， 2011-12-01 Update
IEC 60505:2004 Evaluation and qualification of electrical insulation systems

2008 IEC 61857-1:2008 Electrical insulation systems - Procedures for thermal evaluation - Part 1: General requirements - Low-voltage
2004 IEC 61857-1:2004 Electrical insulation systems - Procedures for thermal evaluation - Part 1: General requirements - Low-voltage
1998 IEC 61857-1:1998 Electrical insulation systems - Procedures for thermal evaluation - Part 1: General requirements - Low-voltage