The priority you give to overvoltage protection depends on your willingness to take risks! Perhaps you think "it’ll never happen to me". Then you won’t have lost anything, but will have gained only very little. However, the subject of overvoltage is then a daily worry for you. But if you wish to be on the safe side, you should include overvoltage protection in your corporate strategy. You will profit from such an investment in operational safety and can prevent a disaster with Weidmüller's surge protection for power, signal and data.
Overvoltage coupling along the conductor path may disturb or destroy sensitive signal inputs. It is important to provide protection in the immediate vicinity of I&C devices. Weidmüller's broad product range for the I&C sector offers products in a 2-piece, pluggable design and modular terminals for tension clamp or screw connection. These products are suitable for both binary and analogue signals. Weidmüller also offers other designs with integrated components such as gas discharge tubes or varistors. VARITECTOR stands for flexible and variable surge protection by Weidmüller, tested according to product standard IEC61643-21. The VARITECTOR series can be used in applications according to IEC 61643-22 / VDE 0845-3 for classes C1, C2, C3 and D1. The VARITECTOR SPC, SSC and MCZ OVP product families optimally combine electrical and mechanical properties. Size and easy handling play an important role. This surge protection is suited for confined spaces in industrical and process automation as well as in building automation applications.
Weidmüller VPU I (Type I), VPU II (Type II) and VPU III (Type III) surge protection products effectively reduce the interference coupling that can occur from transient surge voltages, even significantly below the limits prescribed by insulation co-ordination according to EN 60664-3 / DIN VDE 0110-3. This means that the entire system is exposed to less malfunction.
The co-ordination of the arresters is achieved by technical means. This means that decoupling between types I, II and III is not necessary. The arresters are tested according to product standard IEC 61643-11:2012 / DIN EN 61643-11:2012 and can be installed in systems according to IEC 61643-12 / VDE V0675-6-12 and IEC 62305-4 / VDE 0185-4. This lightning and surge protection device is suited for installation in power supply systems. Weidmüller offers different products for different mains types and voltage levels. Even for photovoltaic applications, there is a special protection according to EN 50539-11/ VDE 0675-39-11: 2010 available.
"Data transmission" is the transfer of characters, numbers, statuses, measurements, etc. between different, decentralised units. "Decentralised units" are controls, computers, measurement sensors, actuators, etc. Appropriate overvoltage protection is essential for such sensitive areas. Weidmüller can offer a wide range of solutions.
To effectively protect your devices and systems from damage caused by lightning and surge voltage, it is sensible to know how high the load offered by the protective elements is.
VARITECTOR LOGGER 30 registers current pulses as of a certain strength which are diverted by your surge protection devices via the PE conductor.
This reliably measures the load of your protective elements. The measurement allows an optimum testing and adjustment of your protection and ideally compliments the type II and III VPU surge protection equipment.