DEHNguard M PV2 SCI 1000 FM

The DEHNguard M PV2 SCI 1000 FM is a modular Type 2 surge arrester for PV applications up to 1,000VDC. The device protects two MPP inputs and provides safe electrical isolation within the protection module. The integrated three-stage DC switching device increases protection reliability under real load conditions. With remote signaling contact and clear fault indication, the arrester supports reliable system monitoring. Thanks to its compact design, it is suitable for string-level installations in commercial and industrial PV systems.

• TechnologyThe arrester operates on the basis of a modular, plug-in protection system with a three-stage DC switching device. This concept enables controlled disconnection during surge events and ensures clear separation within the protection path. With a total impulse discharge current of 40kA and a protection level ≤4kV, the device offers a robust design for demanding PV installations, particularly with long cable runs and high DC system voltage.
  
  Key technical elements
  • Multipole, plug-in protection module for quick replacement during service.
  • Safe electrical isolation to minimize internal arc risks.
  • Protection level ≤4kV for reliable limitation of transient overvoltages.
  • Total impulse discharge current of 40kA for robust discharge capability in the DC string.
• ConnectivityThe integrated remote signaling contact enables direct integration into external status or fault reporting systems. This improves operational transparency and allows a rapid response in the event of failure or when maintenance is required. The clear optical fault indicator supports on-site inspection.
  
  Communication functions
  • Remote signaling contact for forwarding status messages to higher-level monitoring systems.
  • Optical indicator for quick identification of tripped protection modules.
• CompatibilityThe surge arrester is designed for use on the DC side of PV systems up to 1,000VDC and is suitable for protecting two MPP inputs. This makes it flexible for use in string inverter systems of various power classes.
  
  Application range
  • Suitable for PV systems in accordance with IEC60364‑7‑712.
  • Supports 2 MPP inputs for typical commercial PV string configurations.
• Installation conceptThe design with a width of 5TE enables easy integration into common distribution environments. The plug-in module structure facilitates replacement without dismantling adjacent components. Installation is specifically designed for the DC string and supports a clear structure of PV control cabinets.
  
  Installation benefits
  • 5‑TE design for space-saving installation in the control cabinet.
  • Plug-in modules enable fast service without complete deinstallation.