The Klockner Moeller ZB150-100 Thermal Overload Relay is a 3-pole motor protection device rated for 70–100 A, designed to safeguard motors in control circuits. The ZB150-100 model identifies this specific unit within the ZB series and is intended for use with compatible motor contactors to provide overload protection. In normal operation it monitors current and trips to prevent motor overheating when an overload is detected.
