UPR4 are good sales in middle east and southeast Asia. Fuse Rails are appropriate for use in distribution and industrial LV networks and in switchboards with busbar spacing of 185 mm. They are fully protected against accidental contact. They permit safe handling of fuse-links.The fuse base contacts are made of electrolytic copper and reinforced with steel segments in addition to its own compression and elasticity characteristic.Grabbing capacity of conducts is higher than other bases or holder. If bases are put together side by side. Phase seperates which is given as accessory is used for rising of phase isolation. When fused are placed in their bases, the fused blade must sit on base exactly. Otherwise incapacity contact will cause loss of resistance, temperature and power, failuers.