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String NEC2020 90V RSD Device


    PV Rapid Shutdown System (PVRSS) is one of the integral protection elements of disbursed photovoltaic system. Its quintessential attribute is to preserve away from the voltage of 30cm away from the PV module to below 30V indoors 30s after the shutdown computer is started.When the setting up the shut by means of skill of possible of the PV module is positioned requires security or firefighting, it can efficiently stop manageable safety risks such as electric powered powered powered powered powered powered powered powered powered shocks, and protect 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 all at once shutdown module with monitoring, which can all at as rapidly as shut down the PV strings and transmit the archives of the PV strings to the head module with the encouraged useful resource of the PLC signal.

2. Head Module(FR-PVMS-Hxx): Controls the tail module with the beneficial useful resource of the PLC signal, and transmit the records to the predominant controller with the aid of overall performance of the utilization of RS485.

3. Main Controller(FR-PVMS-Mxxx): Displays the electrical electrical power and one-of-a-kind facts of the PV strings, and transmit the facts to the cloud platform at the equal time. Users can remotely manipulate it through the usage of doable of the 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, strength etc.

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

  • Series and parallel arc fault detection, safety and area

  • Leak/Ground fault detection and neighborhood

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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