电气绝缘系统 热评估程序 第42部分：道路运输应用电气绝缘系统(EIS)评估的特殊要求

[中文适用范围]： IEC TS 61857-42:2025提供了一种评估道路运输（汽车）应用中驱动单元内电气绝缘系统（EIS）寿命的程序。典型应用包括混合动力和全电动乘用车、轻型和重型商用车以及公交车中的电机和发电机。通常，IEC 61857系列适用于输入电压不超过1 000 V的电技术产品中的EIS，其中主要老化因素是热。在本文档的上下文中，1 000 V的限制被理解为特定于应用的电池直流电压。通过此程序评估的EIS在其整个生命周期内均应无局部放电。以下应用中EIS的评估不在本标准范围内：- IEC TC 2（旋转机械）范围内的电机和发电机；- IEC TC 9（铁路电气设备和系统）范围内的铁路牵引电机；- 不用于牵引的路用车辆的电机和发电机。 [外文原描述]： IEC TS 61857-42:2025 provides a procedure to evaluate the lifetime of an electrical insulation system (EIS) in a drivetrain unit within road transportation (automotive) applications. Typical applications include motors and generators in hybrid and full electric passenger vehicles, light-duty and heavy-duty commercial vehicles, as well as buses. In general, the IEC 61857 series is applicable to EIS used in electrotechnical products with an input voltage of up to 1 000 V where the predominant ageing factor is thermal. In the context of this document the limit of 1 000 V is understood to be the application-specific battery DC voltage. The EIS evaluated by this procedure will operate free from partial discharges over its whole lifetime. Evaluation of EIS in the following applications is outside the scope: - motors and generators within the scope of IEC TC 2, Rotating machinery; - rail traction machines in the scope of IEC TC 9, Electrical equipment and systems for railways; - motors and generators for road vehicles that are not intended for the traction of them.