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Ferroamp Elektronik AB
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  5. Ferroamp - Fireman Switch

Ferroamp - Fireman Switch

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The EnergyHub system with its Solar String Optimizers brings a new cost effective way to completely disconnect all PV strings in case of a fire hazard. The system utilizes the existing safety relays in the Ferroamp Solar String Optimizers to disconnect as close to the PV strings as possible. No additional expensive DC-breakers are required.

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The system comprises a single remotely operated fireman switch that interrupts DC bus voltage and also interrupts keep-alive messages from the EnergyHub sent to the Solar String Optimizers that will force their internal safety relays to trip within 10 seconds.

  • Disconnection : Simultaneous disconnection of all strings
  • Safe : Circuit breaking close to the PV string
  • Redundant switches : Comprises a single remotely operated switch that interrupts DC bus voltage within 10 seconds
  • Cost effective solution :  Utilizes the existing safety relays in the Solar String Optimizers to disconnect, no additional DC-breakers are required