Camera systems pertain to common safety and monitoring equipment, They are used in various areas of application, in particular when it comes to protecting important objects (nuclear power plants, airports, prisons, military installations, monitoring of State boundaries, …), but also when monitoring of common areas (such as industrial premises, parking spaces, motorway toll stations, train stations, sports arenas and many other premises is to be done.
The systems contain sensible and often expensive electronic components, interconnected via cabling, the latter serving for power supply and picture or data transmission between end sensors and the control system. Each such an installation is exposed to the effects of galvanic or electromagnetic pulses caused by lightning strike or switching processes arising in various technological equipment. Overvoltage impulses result in increased stresses or even destruction of electronic circuits of both the camera system and other electrical equipment, significant reduction of their life cycle and reliability. A much more damaging effect, however, may be caused by loss or inaccessibility of important data provided by the system. It is therefore recommended to protect these from overvoltages by using various types of surge protection devices, in order to limit the overvoltage effects to a minimum and ensure an error-free operation of the camera systems.
- Protection of power distribution mains
- Camera systems are powered from the mains. Through this way overvoltages may be carried over into the system technology. Problems related to overvoltage in power supply networks may reliably be minimized by the installation of SALTEK® lightning arresters of the FLP type, and by surge protection devices of the DA series, equipped e.g. with a HF filter.
- Protection of data cables
- When using cameras with digital image transfer (IP cameras) the power supply to the cameras and the data transferred should not be threatened by overvoltage. Depending on the communication technology employed SALTEK® recommends using SPDs of the DL (or DM) series to protect both the data cables and PoE lines to eliminate potential problems with overvoltages.
- Protection of coaxial transmission lines
- Older (or latency-free) analogous systems use coaxial cables for signal transmissions. Here the optimum solution consists in using appropriate combination of SALTEK® coaxial protections of the FX and SXN, or VL series.
