Lightning current arresters
The first stage of an effective three-stage concept for the protection of the power supply is the lightning current arrester, FLASHTRAB. It is used to limit the surge voltages from lightning strikes and to arrest lightning surge currents in the central power supply.

Surge voltage arresters
The surge voltage protection device, VALVETRAB is the second stage in the concept from PHOENIX CONTACT for surge voltage protection for the power supply. Thus, switching surge voltages in the power supply network, or the residual voltage left in the lightning current arrester during an arresting process are limited to a value lower than1.5 kV.

Equipment protection
Equipment protection as the third protection stage is a sensible continuation of the effective concept of protection for the power supply. The arresters are installed directly in front of the device to be protected and are available in various designs, e.g. as fitted box module, ground contact socket, socket adapter, or as a rail-mountable module.

Surge voltage protection for MCR technology
For the field of measurement and control technology, PHOENIX CONTACT provides surge voltage protection devices with protective circuits for analog or binary signal interfaces. Scaled according to the voltage levels, the circuits are designed, for example, for two, three and four-conductor measurement circuits. A special protection device is available for the protection of intrinsically safe circuits.

Data interface protection
With the use of surge voltage protection devices corresponding to the electrical parameters and mechanical conditions for connection of the data interfaces, the availability of data processing equipment is considerably increased and data loss avoided.

Protection for telecommunications interfaces
Modern telecommunications terminals are sensitive to transient surge voltages. TRABTECH surge voltage protection devices increase the permanent availability of modern telecommunications equipment, such as telephones and telefax machines. Telecommunications protection is adapted to the particular signal transmission, ISDN or analog, and to the specific connection system.

Testing protection devices
It is certainly sensible to occasionally check the performance of the surge voltage protection devices - in some areas, e.g. in power stations or airports, even imperative. With the TRABTECH-TESTER, the performance parameters of most of the TRABTECH products can be tested with ease.

Equipotential bonding and housings
PHOENIX CONTACT provides equipotential busbars and grounding electrodes to consistently realize equipotential bonding and connect it to the grounding system. The robust TRABTECH housings in IP 65 are the practical solution for the separate installation of surge voltage arresters. Thus the surge voltage protection can even be installed in a harsh environment.

Marking
PHOENIX CONTACT has a wide choice of different marking materials in its product range for professional and clear labelling of the protection devices - from equipment marking systems to the CMS Computer Marking System, consisting of software, plotter, milling and engraving system.