What type(s) of interlocking is/are commonly used in the circuit of a reversing motor starter?

In the context of a reversing motor starter, both auxiliary and mechanical interlocking serve important functions to ensure safe and reliable operation. Auxiliary interlocking involves the use of auxiliary contacts to prevent simultaneous energization of forward and reverse circuits, which could result in damaging the motor or associated equipment. It plays a crucial role in managing control logic and ensuring that only one direction can be activated at a time.

Mechanical interlocking, on the other hand, is a physical mechanism that prevents both the forward and reverse contactors from being energized simultaneously. This type of interlocking is generally found within the design of the contactor assembly itself, ensuring that the two mechanisms cannot be engaged at the same time due to their physical locks.

Using both types of interlocking provides a comprehensive level of safety, preventing potential damage to the system and enhancing operational safety. This combined approach is preferred in applications involving reversing motor starters, as it addresses both electrical and mechanical safety concerns.