1s20-y.pdf
The 1S20 Arc Flash Protection relay provides high-speed detection of arc flash hazards in air-insulated metalclad switchgear. Featuring a compact, economic design, it is ideal for new installations or simple retrofits. The device includes two or three arc sensor inputs and two high-speed tripping contacts. Key features include continuous arc sensor supervision, integrated self-supervision with fail alarm contact, and push-button reset. Supporting a wide voltage range (24-250V), the 1S20 is housed in a versatile ZA12 case with flexible mounting options and plug-in terminal blocks for easy installation.
