Optimally adapted voltage protection level with integrated actiVsense technology for the protection of terminal equipment

To ensure a high availability of signal circuits, the integrated LifeCheck function allows to quickly check whether arresters are previously damaged.

The protection module of the pluggable arrester safely snaps into the base part, thus ensuring shock and vibration resistance

Modular design
Completely mounted BLITZDUCTOR XTU. Space-saving two-part design with base part and protection module for DIN rail mounting. The module locking mechanism ensures safe operation, thus the arrester provides protection against vibration effects and shock loads up to a 30-fold acceleration of gravity. The function-optimised design of the arrester ensures both fast and easy replacement of the protection module which houses all relevant protection elements.

Direct / indirect shield earthing
If the line shield cannot be directly earthed on both sides for technical reasons, one-sided indirect shield earthing might be advisable. This can be achieved by using arrester modules of type BXTU ML2 BD S 0-180. The lightning current carrying gas discharge tube in the protection module at terminal 3, 3’ prevents low-frequency compensating currents. Transient interference is thus discharged via indirect shield earthing.

Connecting the lines to the base part
Up to four lines can be connected on two levels. For DIN rail mounting purposes, lines of a pair belonging to each other are connected on top of one another.

Accessory for EMC spring terminals
In conjunction with the two-pole BXTU module, the terminals in the base part can be used for shield earthing. In particular in bus systems, it is advisable to use the EMC spring terminal for large-area connection of line shields to the equipotential bonding. Direct or indirect shield earthing can be implemented by means of the accessory supplied with EMC spring terminals.

Safe installation of the arrester
The function-optimised design of the arrester allows both to safely plug the protection module into the base part and to remove it without problems. The module is secured in the base part by snapping it in (audible click). When pressing the grey buttons, the module can be removed with little effort. This is ensured by the laminated spring contacts and the module release spring. A mechanical reverse voltage protection ensures that the module is installed in the correct position.

LifeCheck monitoring function
The LifeCheck function allows to easily and quickly test arresters without removing the module from the system circuit. Integrated into the protection modules, LifeCheck permanently monitors the status of the arrester. Like an early warning system, LifeCheck reliably detects potential electrical and thermal overload of the protection components. The LifeCheck status can be read out within a matter of seconds by means of DEHNrecord LC via contactless RFID technology. A stationary DEHNrecord MCM condition monitoring system allows status-oriented maintenance of 10 BXTU arresters.

Operating voltage U_N and superimposed signal voltage U_signal