ZB150-70 Eaton Overload Relay

The Moeller ZB150-70 is a thermal overload relay intended for motor protection within an adjustable 50–70A current range. Its three poles support three-phase motor circuits, while an integrated auxiliary contact set includes one normally open contact and one normally closed contact for use in motor control systems. For short-circuit protection at voltages up to 600 VAC, the relay may be paired with a 250A fuse or a 250A circuit breaker. The adjustable overload setting allows the protection range to be aligned with the motor’s operating current, and the 50–70A rating identifies its intended load class. The unit is certified to UL, CSA, and IEC standards for heavy-duty industrial motor-overload applications.