低压系统内设备的绝缘配合.第1部分:原则、要求和试验

[中文适用范围]： GB／T 16935的本部分规定了低压系统中设备的绝缘配合，本部分适用于海拔至2 000 m，额定电 压交流至1 000 V、额定频率至30 kHz或直流至1 500 V的设备。 根据设备的性能标准，本部分对设备的电气间隙、爬电距离和固体绝缘的要求作了规定。本部分包 括有关绝缘配合的电气试验方法。 本部分规定的最小电气间隙不适用于具有电离气体之处。有关这种情况的特殊要求可由相应的产 品标准技术委员会自行处理。 本部分不涉及确定以下几种距离： ——通过液体的绝缘； ——通过除空气以外的气体； ——通过压缩空气。 注1：额定频率高于30 kHz的低压系统内设备的绝缘配合按IEC 60664—4规定。 注2：设备内部电路可能会出现较高的电压。 注3：海拔高于2 000 m的尺寸确定指南见表A．2。 本部分是电气基础安全标准，旨在指导有关产品标准技术委员会对其负责的各种设备合理地制定 有关要求，达到绝缘配合的目的。 本部分为各产品标准技术委员会确定设备在空气中的电气间隙、爬电距离和固体绝缘提供了必要 的指导资料。 制造商和产品标准技术委员会有责任应用本基础安全标准规定的要求，如有必要，在设备标准的范 围中引用这些要求。 ’ 如相关产品标准没有规定电气间隙、爬电距离的数值以及对固体绝缘的要求，或在没有标准的情况 下，本部分适用。 [外文原描述]： IEC 60664-1:2007 Deals with insulation coordination for equipment within low-voltage systems. It applies to equipment for use up to 2 000 m above sea level having a rated voltage up to a.c. 1 000 V with rated frequencies up to 30 kHz, or a rated voltage up to d.c. 1 500 V. It specifies the requirements for clearances, creepage distances and solid insulation for equipment based upon their performance criteria. It includes methods of electric testing with respect to insulation coordination. The minimum clearances specified in this standard do not apply where ionized gases occur. Special requirements for such situations may be specified at the discretion of the relevant technical committee. This standard does not deal with distances: - through liquid insulation, - through gases other than air, - through compressed air. Main changes have been made with respect to the previous edition: - Amendment of Japanese mains conditions with regard to the rated impulse voltages, the rationalized voltages and the nominal voltages of supply systems for different modes of overvoltage control - Amendment of dimensioning of clearances smaller than 0,01 mm - Alignment of the table and the corresponding formula regarding test voltages for verifying clearances at different altitudes - Amendment of interpolation of the creepage distance values for functional insulation - Amendment of creepage distance dimensioning taking into account ribs - Revision of the former Clause 4 "Tests and measurements" (now Clause 6) to achieve a more detailed description of the tests and their purpose, the test equipment and possible alternatives - Change of Annex C "Partial discharge test methods" from a former technical report, Type 2 (now called TS), to a normative Annex C.