Is it true that bimetallic overloads allow adjustment of the trip point?

Bimetallic overloads are designed to protect electric motors from overheating by breaking the circuit when the current exceeds a predefined limit. These devices work by utilizing the principle that different metals expand at different rates when heated. In a bimetallic overload, the bending of the metal strips due to heat is what ultimately leads to the tripping of the circuit.

The trip point for such devices is typically set at the factory and is not adjustable. This characteristic ensures consistent and reliable protection for the motor, as an adjustable trip point could be set incorrectly leading to either nuisance tripping or insufficient protection. Therefore, the inherent design of bimetallic overloads makes the statement regarding adjustment of the trip point false.

Other options suggest varying conditions under which the adjustment might occur or imply manufacturer-specific differences; however, the fundamental operation of bimetallic overloads is standardized to ensure safety across applications.