CL – COAXIAL CCTV PROTECTORS
Novaris Coaxial CCTV protectors are suited to the protection of security and CCTV applications. The 68V version has been specifically designed for PoE over coax applications.
Product Codes: CLB-MF-10, CLB-FF-10, CLB-FM-10, CLB-FM-10, CLB-MF-18, CLB-FF-18, CLB-FM-18, CLB-FM-18, CLB-MF-36, CLB-FF-36, CLB-FM-36, CLB-FM-36, CLB-MF-68, CLB-FF-68, CLB-FM-68, CLB-FM-68
The distributed nature of a CCTV network makes the system particularly susceptible to lightning and surge activity. During a surge event each remote camera and the DVR will rise to a different earth potential as each unit has a different impedance to ground. This can cause insulation breakdown and overcurrent problems for the equipment. To protect against these effects the protection device provides a low impedance path that reacts at a voltage lower than the insulation breakdown voltage of the equipment. This application note details the surge protection devices available for a most CCTV protocols and applications.
BNC Coaxial Signal Protection The CLB coaxial protection units are designed specifically for security and CCTV application. They have a 20kA protection front stage and secondary silicon based protection to provide a low let through voltage. They are enclosed in an extruded aluminium enclosure to protect the signal from external interference. The unit has an earth stud mount for earthing and can be ordered with a DIN rail mount option.
- By installing surge protection at both ends of the signal cable:
- The surge current has a clear path to ground at both ends
- The effective protection on the cable is doubled
- The shield wire can be used as a temporary equipotential bond during the surge
- The equipment at both ends is effectively protected due to their proximity to the SPD.
STANDARDS COMPLIANCE
- IEC 61643-11
- AS/NZS 1768
- IEEE C62.41
- IEC 61643-21
- UL497B
- SFD1-x-10-275-C: This series is designed for 230 VAC systems and handles a 10 kA surge on the power line and a 20 kA surge on the signal line.
- SFD1-x-10-50-C: This series is designed for lower voltage 40 VAC systems and handles a 10 kA surge on the power line and a 20 kA surge on the signal line.
- SFD1-x-3-30-C: For lower voltage 24 VAC systems, this model provides 3kA of protection for the power line and 20kA for the signal line.
- Protection Details:
- Power Protection: Utilizes a 3-stage protection system with a low-pass LC filter, offering all-mode protection (L-N, L-PE, N-PE) and a low let-through voltage to safeguard sensitive equipment.
- Signal Protection: Features multistage protection using gas discharge tubes and fast transient suppression circuits, with options specifically for PoE over coax applications.
- CL Coaxial Protectors: These dedicated coaxial surge protectors (e.g., CLB12-90, CLB-68V) are suitable for various voltage and frequency requirements, including specialized 68V versions for PoE over coax.
- SFD Surge Filters: Available in various current ratings (2A-32A), these power line filters provide robust 3-stage protection for the mains input to DVRs and other control equipment.
- SL Signal Line Protectors: For PTZ camera control signals (e.g., RS485 protocol), the SL-485 range offers multi-stage protection for the twisted pair control wiring.