Material group - Conditions of installation of assemblies - Stationary/movable installation of the low-voltage switchgear - Protection category - Use by skilled persons or ordinary persons

Technical System Catalogue Ri4Power

Ri4Power Material group Standard reference to Table 2, IEC 61 439-1 To define the creepage distances on insulating components, All Ri4Power components, provided they are used correctly, it is necessary to stipulate the material group as well as the meet the minimum creepage distance of 16 mm required in pollution degree. conjunction with pollution degree 3 and a rated insulation The insulating materials of the busbar supports used in voltage Ui of 1000 V. Ri4Power all meet material group IIIa with a CTI of between 175 and 400 (CTI = comparative tracking index). Conditions of installation of assemblies Standard reference chapter 7.1 to IEC 61 439-1 When installing the system, we distinguish between interior For installation conditions that deviate from this, where installation and exterior installation. applicable, the torques will need to be adjusted. However, the maximum admissible torques for the connection com- Ri4Power low-voltage systems are designed for interior ponents must not be exceeded. installation and all tightening torques and corrosion resist- ance have been calculated accordingly. Stationary/movable installation of the low-voltage switchgear Standard reference chapter 3.5.3 – 3.5.4 to IEC 61 439-1 Ri4Power low-voltage switchgear may be used for both types of operation. However, for mobile use, special measures A low-voltage switchgear may be described as mobile if it must be taken by the manufacturer of the switchgear enclo- is easily moved from one installation site to another. sure, such as stable, torsionally stiff transport plinths, defined If a low-voltage switchgear is fixed installed and operated, servicing intervals for screw connections etc. it is described as stationary. Protection category Standard reference chapter 8.2 to IEC 61 439-1 The protection category of an enclosure describes the pro- For this reason, where possible according to the usage tection requirements from solid and liquid media coming options, low-voltage systems should be designed with low into contact with the low-voltage switchgear. The different protection categories, in order to ensure the best possible requirements and test methods are described in IEC 60 529. heat dissipation. Ri4Power offers 3 different protection categories as standard: If a low-voltage system is placed in an electrical operating IP 54, IP 43 and IP 2X. room, a protection category of IP 54 is not necessarily required, and greater attention should be devoted to the The higher the chosen protection category, the higher the leak-tightness of the cable entry into this operating room. reduction factors that reduce the rated currents of the operat- ing equipment used. Furthermore, at high protection catego- ries, high interior temperatures arise in the low-voltage switchgear, which may adversely affect the service life of the operating equipment. Use by skilled persons or ordinary persons Standard reference chapter 8.4.5 to IEC 61 439-1 A skilled person is an individual whose training and experi- The suitability of low-voltage switchgear for use by ordinary ence enables them to identify the risks and potential persons ends at a rated current of 250 A and is limited to dangers associated with electricity pursuant to IEC 61 439-1 a maximum short-circuit resistance of 10 kA. section 3.7.12. An ordinary person is a person who is not a qualified electri- cian and does not have any training in electrical engineering. Rittal Technical System Catalogue/Power distribution 2 - 40


Technical System Catalogue Ri4Power
To see the actual publication please follow the link above