häwa GmbH lately received new national technical approvals (ABZ) for its fire protection enclosures according to the latest guidelines of the German Institute of Construction Technology (DiBT). According to the new approvals Z-86.1-20 und Z-86.1-22 of the DiBT, häwa’s HFA-fire enclosures are able to resist fire of at least 30 min resp. 90 min. In comparison to the past, indications about the cables inserted are obligatory now according to new guidelines. Here the competitive advantage of häwa’s fire protection enclosures is existent, since they have the maximum permitted total conductor cross-section of all cables in the market relative to the housing volume. Already at overall dimensions of 600mm x 1000mm x 600mm (WxHxD) single cables up to 4x240mm² and a total conductor cross-section of all cables of 3362mm² can be inserted into the fire protection enclosures via the cable inlet. With smaller housing volumes linear interpolation is possible.
For users the total conductor cross-section of all cables in the national technical approvals (ABZ) of the enclosures is very important. If the permitted total conductor cross-section of all cables of a single cable resp. of all inserted cables exceeds the cross section indicated in the national technical approvals (ABZ), the user can not incorporate its electrical device in the specific enclosure and has to buy a possibly bigger and more expensive enclosure in order to be allowed to insert the quantity of cable needed. Already 10 years ago, häwa recognized that the customer is in his applications more flexible the more cable is permitted for the respective enclosure size. Therefore, back then häwa had his fire protection enclosures proved according to the worst-case-principle and had national technical approval.
Another advantage of häwa’s fire protection enclosure is its flexibility in size and assignment of the sealing of cables. häwa’s sealing of cables can be mounted on, under, as well as sideways. Additionally, there are several alternatives for the direct inserting of the cables or for the connection of a fire-protection cable duct.
