Rapid Shutdown (RSD) for inverters
What is rapid shutdown?
Rapid shutdown refers to a safety feature designed to enhance the safety of solar energy systems by minimizing the risk of electrical hazards during emergencies or maintenance activities. In simple terms, it ensures that the flow of electricity from solar panels to the rest of the system is quickly and effectively shut down when necessary.
Why is having rapid shutdown important?
- Enhanced Safety: Rapid shutdown significantly reduces the risk of electrical shock and fire hazards. During emergencies such as a fire, earthquake, or when maintenance work is being performed, it's crucial to quickly halt the flow of electricity from the solar panels. By doing so, first responders and maintenance personnel can work safely without the danger of being exposed to live electrical currents.
- Compliance with Codes and Standards: Rapid shutdown is required to meet certain electrical codes and standards, such as the National Electrical Code (NEC) in the United States. These codes are put in place to ensure the safety of both homeowners and professionals working with solar energy systems. By having rapid shutdown installed, you comply with these regulations and ensure your system is up to the required safety standards.
- Protection for the Grid and Workers: During power outages or maintenance on the electrical grid, rapid shutdown helps prevent solar panels from continuing to feed electricity into the grid. This is important for the safety of utility workers who may be working on the grid, as it eliminates the risk of encountering unexpected electricity flow and potential accidents.
- Peace of Mind: By having rapid shutdown installed in your residential solar system, you can have peace of mind knowing that your system is equipped with an added layer of safety. You can rest assured that in case of an emergency or maintenance, your system will automatically and swiftly shut down, minimizing any potential risks.
Recommended Products:
Tigo TS4-A-2F
The TS4-A-2F (Fire Safety) is an advanced add-on solution designed to provide rapid shutdown functionality, incorporating intelligent module capabilities into standard PV modules to enhance their reliability. This solution offers the ability to upgrade existing PV systems or integrate safety features into new installations, ensuring enhanced safety measures.
When the TS4-A-2F is installed with the Tigo RSS Transmitter, it complies with the NEC 2017 and 2020 690.12 Rapid Shutdown specifications. This adherence to the regulations guarantees that the system meets the required safety standards for rapid shutdown.
With the TS4-A-2F, users can benefit from improved safety features by leveraging the smart module functionality, making standard PV modules more reliable. It provides peace of mind by reducing potential risks and hazards associated with emergency situations or maintenance activities in both existing and new PV installations.
Tigo TS4-A-F:
The TS4-A-F facilitates cost-effective implementation of rapid shutdown functionality in a one-module-to-one-TS4 configuration. This device boasts dual IEC and UL certifications, ensuring its acceptance and compatibility on a global scale. Moreover, the TS4-A-F holds UL PV Rapid Shutdown System (PVRSS) certification and seamlessly integrates with numerous inverters to fulfill NEC 2014, 2017, and 2020 rapid shutdown stipulations. Notably, several inverters feature built-in RSS transmitters, establishing communication with the TS4-A-F via Power Line Communication (PLC). This arrangement enables convenient plug-and-play installations, streamlining the setup process.
Tigo RSS Transmitter
The RSS Transmitter employs Power Line Communication (PLC) to transmit a signal to the TS4-F units, ensuring the continuous connection of PV modules while they are powered on. When the RSS Transmitter is deactivated, the TS4-F units automatically enter rapid shutdown mode, halting energy production. Once power is restored to the RSS Transmitter, the TS4-F units resume normal operation and recommence energy generation.
This solution aligns with the rapid shutdown specifications outlined in NEC 2014, 2017, and 2020, specifically the 690.12 requirements. By utilizing power-line communication (PLC), the system achieves compliance with these regulations, ensuring the safe and efficient operation of the solar energy system.
