Sprecher & Schuh – CEF1‑11 – Electronic Motor Protector, 0.5–180 A, 240 V AC

The Sprecher & Schuh CEF1‑11 is a solid-state electronic motor protection relay that offers reliable overload, single-phase, and phase-unbalance protection for motors up to 180 A. Featuring adjustable tripping time (2–30 sec), phase-loss detection, and LED fault indicators, it integrates directly with contactors for seamless motor control. This discontinued unit remains widely used due to its accuracy and adaptability.  

Key Specifications

• Model: CEF1‑11 – 0.5–180 A setting range

• Voltage: 240 V AC (also available in other voltages)

• Protection Features: Thermal overload, phase-loss, and phase-unbalance protection  

• Time Delay: Adjustable from 2 to 30 seconds with precision slide-switch selection  

• Trip Indicator: Red LED for thermal trip; LED memory retains fault indication  

• Mounting: DIN-rail or bus-bar mount; loop-through bus bar available  

• Dimensions/Weight: Approx. 1.02 kg