The BS series box provides an appropriate level of protection for the electrical installation during a fire. The box allows you to maintain the power supply in the E90 class, i.e. to maintain the operation of installations related to fire protection during 90 minutes of their critical operation in fire conditions. The protective mechanism of this box results from the joint operation of two factors: a massive casing of the body made of a special plastic and a special internal element, which by swelling covers the entire inside of the box, cutting off the air supply, thus protecting the internal elements of the installation.

In particular, these include the following applications in fire protection installations:

Power supply for fire protection devices, e.g. central emergency lighting battery, damper actuators and control panels: fire alarm systems, smoke exhaust control, sound warning systems, etc.
Data transmission in fire alarm systems
Loudspeaker installation ;in DSO, SSP acoustic and optical signaling devices

The box, despite its larger than standard external size - is suitable for mounting accessories frames with a spacing of 71mm. Special flattening on the sides of the wall makes it possible to embed them with an axle spacing of 71mm.