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NEC2020 80V Rapid Shutdown Device


        PV Rapid Shutdown System (PVRSS) is one of the indispensable safety factors of disbursed photovoltaic system. Its fundamental attribute is to minimize the voltage of 30cm away from the PV module to below 30V interior 30s after the shutdown gadget is started.When the setting up the vicinity the PV module is positioned requires safety or firefighting, it can efficaciously quit manageable safety dangers such as electric powered powered shocks, and guard the lives of safety personnel and firefighters.

System Components


PV Rapid Shutdown System (PVRSS) is instead composed of the following PV swiftly shutdown devices:

1. Tail Module(FR-PVMS-Txxx): A speedy shutdown module with monitoring, which can rapidly shut down the PV strings and transmit the records of the PV strings to the head module via the PLC signal.
2. Head Module(FR-PVMS-Hxx): Controls the tail module through the PLC signal, and transmit the statistics to the predominant controller by using RS485.
3. Main Controller(FR-PVMS-Mxxx): Displays the electricity and different statistics of the PV strings, and transmit the records to the cloud platform at the equal time. Users can remotely manage it via the cell smartphone APP(SafeSolar).

Key Features 

  • PV module speedy shutdown assembly NEC 2017 & 2020 (690.12) necessities

  • Bidirectional PLC verbal exchange

  • PV module monitoring: on/off status, temperature, voltage, current, energy etc.

  • Advanced monitoring: inverter performance, module shading, module degradation, soiling

  • Series and parallel arc fault detection, safety and area

  • Leak/Ground fault detection and place

Application Diagram


Key Technical Specifications

Component Model Item Parameter
Tail Module FR-PVMS-TSXX Input operating voltage range 12V-60V
Accuracy of voltage measuring ±0.2V
Maximum System Voltage 1500V
Output voltage after shutdown V(input)/100
Maximum cont. input current
Reverse current 25A
Accuracy of current measuring ±0.05A
Communication PLC
Communication capability, the
length of cable loop
Operating temperature 40℃~ +80℃
Enclosure Rating NEMA Type 6P/IP68
Safety Compliance UL 1741 (Ed.2, Rev. February 15, 2018),CSA
C22.2 No. 330-17






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