https://www.overseadia.com/en-US/detail/55ff07d63a2bd17a10ff880cba6a1850 The RN1, RN2, and RN3 indoor high voltage current limiting fuse are designed to provide protection for your electrical system against overcurrents. They are ideal for use in medium and high voltage applications, including power distribution, transformers, and switchgear. With their compact design and reliable performance, the RN1, RN2, and RN3 fuses can help to prevent damage to your equipment and minimize downtime.