The fuse can be used independently or incorporated with switches that are not provided with a tripping device, from back-up fuses to current limiting fuses which can interrupt all current ranges.
FUJI current limiting power fuses are available in general purpose and back-up versions. Type SCF and HF ··· E general purpose fuses will interrupt all excessive current ranging from the minimum melting current to the rated interrupting current. They will accurately interrupt a 200 – 300% overcurrent of the rated current. The fuse can be used independently or incorporated with air load break switches not provided with trip mechanisms. Very economical to install. The back-up fuses are rated at 12kV or higher and used with switches provided with trip mechanisms incorporated with CT or OCR.