LA130URD70TTI0200

Electrical specialty fuses are designed for specific applications in areas such as industrial, commercial, and residential buildings, as well as in automotive, machinery, and equipment. One type of electrical specialty fuse is the LA130URD70TTI0200. This fuse is a thermal-assisted current limitation fuse typically used in high voltage power systems, such as those found in photovoltaic (PV) inverters.

The LA130URD70TTI0200 has a rated current of 130 amps (A), a rated voltage of 700 volts (V), and a time-current curve of 800 volts (V). The time-current curve is a graph that shows the relationship between the amount of current that a fuse can safely withstand and the amount of time that it can withstand that current without failing. The time-current curve for the LA130URD70TTI0200 is broken into two distinct segments: the first segment extends up to the fuse’s rated current with a relatively flat level of time-current capability; the second segment extends well beyond the rated current, with higher levels of time-current capability.

The LA130URD70TTI0200 is designed to limit the amount of current that flows through it, which reduces the magnitude of any fault current that could potentially cause damage or impair the safety of personnel and equipment. The fuse’s thermal-assisted design helps it to react quickly to over-currents and over-voltages, allowing it to limit these fault currents. This protection is especially important in areas where fault currents could be dangerous, such as those found in photovoltaic inverters.

The working principle of the LA130URD70TTI0200 is based on the concept of thermal-assisted current limitation. When the fuse operates at its rated current, the copper and graphite wires that make up the fuse react to the current and absorb its thermal energy. These wires then dissipate this absorbed thermal energy and create a temperature gradient along the length of the fuse. As the temperature gradient increases, the resistance of the fuse also increases, resulting in a corresponding decrease in the amount of current that is allowed to flow through it. If the current exceeds the fuse’s rated current, then the temperature gradient will increase even more, causing a further decrease in the amount of current that is allowed to flow through the fuse.

The ability of the LA130URD70TTI0200’s to limit the amount of fault current helps protect end users and their equipment. The fuse’s thermal-assisted design ensures that the fuses are able to respond quickly to over-currents and over-voltages, allowing them to limit the magnitude of these fault currents. As such, this type of specialized fuse is ideal for areas where fault currents could be dangerous, such as those found in photovoltaic inverters.