Siemens 400 V / 210...590 A operating instructions Opening cross sections

01.2004 Installation

Opening cross sections

Partitions should be executed up to the cabinet frame and should be designed in such a way that the discharged air flow is taken around the cabinet beams and not pressed into them.

Partitions are necessary with all types of protection higher than IP20.

The necessary opening cross sections are 0.26 m2.

The indicated opening cross-section is made up of several holes. In order to keep the pressure loss here to a minimum, the cross-sectional surface has to be at least 280 mm2 per hole (e.g. 7 mm x 40 mm).

The opening and hole cross-sections ensure functioning even with high types of protection.

These are implemented by using wire-lattices (wire fabric DIN 4189- St-vzk-1x0.28) in front of the openings or the filters indicated in the following. If finer filters are used, the filter surface and thus the opening cross-section (upwards) have to be adapted accordingly.

If filters are used, the intervals for their replacement must be observed!

Siemens AG 6SE7087-6CX86-2BA1	5-5
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