ABSTRACT
A fuse is a simple device with a metal link that will predictably and reliably melt when a predetermined amount of current is passed through it for a certain duration of time. There are three categories of miniature fuses often found in automated lights: fast-acting, very fast-acting, and slow-blow. The resistance of the fuse element combined with the current flowing through it produces heat; if enough current flows through the element it will heat to the point of melting. The main characteristics of a fuse are the rated current, rated voltage, speed of operation, interrupting rating or breaking capacity, and the ambient operating temperature. Many automated lighting luminaires have temperature sensors and/or thermal protection to help prevent lamp failures, component failures, and overheating that could lead to damage or fire. There are several different forms of temperature sensors and thermal protection, including thermistors, thermostats, and thermal breakers.
