The surveillance monitoring system receives video and control signals from cameras installed both indoors and outdoors, transmitting them to the central control host for centralized monitoring. To ensure the system's stability and prevent damage caused by lightning-induced overvoltage and overcurrent, it is essential to implement proper lightning protection measures—whether the equipment is located indoors or outdoors.
In general, when designing a lightning protection system for a surveillance setup, several key factors should be considered:
1. **Lightning Protection for Front-End Equipment**
The front-end devices, primarily outdoor cameras, are highly susceptible to lightning strikes. To minimize the risk of electromagnetic induction, power and signal cables connected to these cameras should be routed through metal conduits for shielding. Given that signal lines often have long transmission distances and low voltage resistance, they are prone to being affected by induced lightning currents, which can cause serious damage. Installing a signal surge protector is crucial to safely divert the lightning current into the ground. Suzhou Kejia’s NKP-TEL-4C Series II, which offers one-in-one or three-in-one protection, is ideal for protecting dome and bullet cameras.
2. **Lightning Protection for Transmission Lines**
The main transmission lines in a surveillance system include both power and signal cables. The power line entry point should be equipped with a dedicated power surge protector. The Suzhou Kejia NKP-DY series power surge protection device is specifically designed to safeguard cameras from overvoltage surges that may occur on the power line.
3. **Lightning Protection for Terminal Equipment**
In the monitoring room, where the central control unit is located, lightning protection is especially critical. It should include direct lightning protection, prevention of lightning wave intrusion, equipotential bonding, and surge protection. Since approximately 80% of lightning-induced high voltage enters through the power line, it is recommended to install a three-level lightning protection system on the main power supply. Additionally, before the video transmission line, signal control line, or intruder alarm signal line connects to the front-end devices or the central console, appropriate surge protectors should be installed.
This overview provides an introduction to the "Surveillance System Lightning Protection System." For more detailed information on lightning protection solutions and products, you can search for "Kejia Lightning Protection" on Baidu.
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