Classification of environmental conditions-Part 3: Classification of environmental parameters and their severities-Introduction

رقم المستند: NL IEC 60721 3 : 2003
القطاع: Electrical Engineering
TC: NL TC EO
ICS:
IEC Publication 721-3:Classification of Environmental Conditions, Part 3: Classification of Groups of Environmental Parameters and Their Severities, establishes classes of environmental parameters and their severities, covering the extreme (short-term) conditions which may be met by a product when being transported, installed, stored and used. Separate groups of classes are given for different product applications (e.g weather-protected stationary, mounted in ground vehicles, transportation). The classes also take into account the degree of restriction of the use of the product from very restricted conditions (e.g in temperature-controlled rooms) to unrestricted conditions. The classification covers natural as well man-made conditions