Photovoltaic Firefighter Safety Switch

 
     



Product Overview

The Photovoltaic Firefighter Safety Switch is designed to meet the fire safety requirements of photovoltaic (PV) systems. In emergency situations, it quickly isolates and disconnects the photovoltaic DC power supply, thereby ensuring the safety of the photovoltaic power generation system. It is suitable for both residential and commercial and industrial photovoltaic power generation systems, with a circuit voltage as high as 1500V, meeting the requirements of high-power photovoltaic power generation systems.

Over-Temperature Protection: The switch automatically disconnects when the internal temperature exceeds 85°C.

Maximum Circuit Voltage: DC 1500V  

Maximum Circuit Current: 40A

Protection Rating: IP65

Material: Flame-retardant V-0 / UV-resistant material

Emergency Shutdown: Pressing the emergency switch during an emergency safely isolates and disconnects the photovoltaic DC power supply. The product is plug-and-play, making installation convenient.

Durability: The product is designed to withstand high temperatures, corrosion, and impacts, ensuring safety and reliability.

Applications: Suitable for residential, commercial, and industrial photovoltaic power generation systems.

   

Technical Specifications

Built-in Circuit Breaker Parameters for PV Fire Safety Switch

1.Frequently Asked Questions （FAQ）

Q: How does the SGFS-PS fulfill NEC 690.12 Rapid Shutdown requirements?

A: The SGFS-PS acts as a rapid shutdown initiator by sensing the loss of AC power. When the building's main AC breaker is tripped by firefighters, the SGFS-PS instantly disconnects the DC string conductors, reducing the voltage to safe levels within the array boundary, as mandated by NEC 2017/2020 690.12(B).

Q: Is the SGFS-PS compatible with high-power 1500V solar systems?

A: Yes, the SGFS-PS is specifically engineered for high-voltage applications up to 1500Vdc. Unlike standard residential switches rated for 600V or 1000V, this series is suitable for large-scale industrial and utility-scale rooftop solar projects.

Q: What happens if the internal temperature of the switch gets too high?

A: To prevent fire hazards within the device itself, the SGFS-PS includes a thermal trip mechanism. If the internal temperature exceeds 85°C, the DC switch automatically opens, isolating the PV power even if the AC supply is still present. This provides an additional layer of protection against localized heat buildup.

Q: Does it require professional maintenance?

A: While designed for durability, we recommend a visual inspection every 12 months to check for UV degradation, enclosure integrity, and terminal tightness. The device provides a maintenance-free mechanical life of 10,000 cycles under normal operating conditions. 

2.Company Profile

About China SINGI GROUP: 30 Years of Electrical InnovationFounded in 1995, China SINGI GROUP is a premier global manufacturer specializing in low-voltage electrical components and intelligent energy solutions. With a registered capital of USD 10 million and a state-of-the-art 40,000 $m^2$ production facility, Singi has spent over three decades perfecting the art of electrical safety.

Our commitment to quality is validated by ISO9001, ISO14001, and ISO45001 certifications, alongside more than 50 national patent certificates. With a dedicated R&D team and a global presence including offices in Kazakhstan and exports to over 30 countries, Singi Group delivers industrial-grade PV safety switches like the SGFS-PS that meet the rigorous demands of modern renewable energy infrastructure. 

3. Product Application Scenarios & Use Cases

• Commercial & Industrial (C&I) Rooftops: Ideal for large warehouses and manufacturing plants where 1500V strings are standard, providing rapid de-energization to protect high-value assets and personnel.

• Residential PV Installations: Enhances homeowner safety by ensuring that DC lines running from the roof to the inverter are instantly killed during grid failures or fire emergencies.

• Solar Carports & EV Charging Hubs: Perfect for outdoor structures where UV exposure and high ambient temperatures are common, utilizing the IP65 rating and UV-resistant housing.

• High-Rise Building Solar Integrated Systems: Provides the necessary safety disconnects required by local fire departments for tall structures to facilitate safe firefighting maneuvers on rooftops. 

4.Product advantages

• Ultra-High Voltage Rating: Rated for systems up to 1500Vdc, accommodating high-power modern PV arrays used in industrial and commercial installations.

• Rapid Response Thermal Protection: Integrated thermal sensors trigger a full system shutdown when the internal enclosure temperature reaches 85°C, preventing fire propagation from thermal runaway.

• Automatic AC Power Loss Trigger: Utilizes the loss of AC supply as a signal for immediate DC isolation, fulfilling the core safety requirements of global building codes like NEC 2017/2020.

• IP65 Weatherproof Enclosure: Housed in a flame-retardant (V-0) and UV-resistant enclosure, the device is built to withstand extreme outdoor conditions including corrosion and high-temperature cycling.

• Long-Cycle Operational Life: Features a mechanical life of 10,000 operations and an electrical life exceeding 300 cycles under load, ensuring decades of reliable field performance.