Fire safety switch PROJOY PEFS-EL50H-6 – P2 (MC4) – 3 strings

The fire safety switch PROJOY PEFS-EL50H-6 – P2 (MC4) – 3 strings is a modular device for rapid disconnection of PV circuits (Panel Level Rapid Shutdown) designed for photovoltaic installations with 3 parallel strings. The product provides automatic and manual DC/AC shutdown modes, overheating protection, and the ability for remote shutdown via optional RS485 communication.

Manufacturer: ProJoy Electric Co., Ltd. ProJoy specializes in safety devices for photovoltaic installations, offering products with a higher degree of protection (IP66) and compliant with EN 60947 standards. In the technical documentation, the manufacturer provides operational and mechanical data in accordance with the requirements of the PV market and uses the second generation of enclosures made by injection molding.

Electrical parameters

• String voltage range (Vdc): 300–1500 Vdc
• String current (A): up to 55 A (depending on conditions and configuration)
• Number of strings: 3–5 (for this product configuration 3 strings)
• Expected types of wiring: 6/8/10 (variant 6 used with 3 strings / MC4)
• Network supply voltage for the control system: 100 Vac – 270 Vac (nominally 230 Vac)
• Nominal control current: 30 mA
• Inrush current (charging): average 100 mA, max 300 mA
• Feedback contact: 24 Vdc – up to 300 mA max
• DC switch: disconnector compliant with IEC 60947-3, used in the DC-PV1 category
• Certifications: CE, compliance with EN 60947-1&3

Mechanical parameters

• Protection degree: IP66
• Protection class: Class II
• Maximum operating temperature before automatic disconnection: +70 °C
• Operating temperature range: -40 °C to +70 °C
• Storage temperature range: -40 °C to +85 °C
• Enclosure material: second generation enclosure made by injection molding (fire retardant)
• Dimensions (as stated in the documentation): length 375 mm, height 224 mm, depth 95 mm; total length of connectors/outputs 457 mm
• Number of operating cycles: 10000 mechanical cycles; >1500 cycles under load (category PV1)