IEC 60664-1:2007 PDF Download

IEC 60664-1:2007 is a standard that focuses on insulation coordination for equipment within low-voltage systems. This standard applies to equipment with a maximum rated voltage of AC 1000V or DC 1500V and rated frequencies up to 30 kHz, for use up to 2000m above sea level. It provides guidelines and requirements for clearances, creepage distances, and solid insulation for equipment based on their performance criteria.

The standard also includes methods for electric testing to ensure insulation coordination. It emphasizes that the specified minimum clearances do not apply when ionized gases are present, and additional requirements may be specified for such situations. However, it does not cover distances through liquid insulation, gases other than air, or compressed air.

Some of the main changes made in this edition include amendments to the Japanese mains conditions related to rated impulse voltages, rationalized voltages, and nominal voltages of supply systems. The standard also revised the dimensioning of clearances smaller than 0.01mm and made changes to the creepage distance dimensioning, taking into account ribs. Additionally, the standard provides a more detailed description of tests, their purpose, test equipment, and alternatives.

Furthermore, Annex C, which previously existed as a technical report, has been changed to a normative Annex C, focusing on partial discharge test methods. These changes aim to improve clarity and alignment in the standard, ensuring proper insulation coordination for equipment within low-voltage systems.