Schneider Electric B79.0

The Thermal Unit, Type S, Type B with a melting alloy composition is engineered for motor protection against excessive heating. Specifically categorized under Class 20, these units are capable of tripping within 20 seconds or less during overload conditions, ensuring timely response to potential hazards.

The operation is facilitated by a dedicated heater winding, through which the motor current flows. In the event of an overload, the generated heat melts a unique solder, allowing a ratchet wheel to disengage and subsequently open the control circuit contacts, cutting power to the motor.

This unit's design features a one-piece construction for enhanced reliability. It is essential to note that the thermal overload type utilizes a melting alloy, aligning with the specifications for product range B and tripping class 20, effectively responding to overload conditions and enhancing safety in motor applications.