RT20系列刀型觸頭熔斷器主要用于額定電壓至交流500V，額定電流至1600A的配電系統中作為線路和電纜的過載保護和短路保護。

本系列熔斷器能與國外符合IEC、DIN標準的同類熔斷器完全互換。

Series RT20 fuses with blade contacts are mainly used in distribution net of  rate voltage up to 500V a. c. and rated current up to 1600A for the protection  of line and cables against all damages from fault currents between overload  and rated breaking capacity. This series fuses achieve full exchangeability  with similar fuses on domestic and international markets.

特色

● 特殊設計的變截面尺寸熔體，以及起“M-效應”作用的低熔點合金在位置、形狀、和定量上的精確配置，降低了熔斷體功率損耗，形成理想的多段保護特性。

● 高強度致密型瓷管具有極好的耐冷熱劇變和抗沖擊性能。

● 有較高燒結溫度的高純度石英砂作滅弧介質。

● 整體冷鐓成型觸刀，結構強度和導電性能良好。

● 多種形式的底座可供選擇使用。

● The particular design of variable section size of the fuse-element and the  accurate           configuration of low melting point alloy taking metallurgic effect  in respect of the position, shape, and amount have lowered the power  dissipation and formed ideal protection characteristics

● The high strength dense alumina ceramic tubes have excellent  performance against abrupt temperature change and resistance to impact.

● High purity quartz sand with comparatively high sintering temperature i  used as arc extinguishing medium.

● The integral blade contacts are shaped with cold forging, which ha  good structure strength and fine electrical conductivity

● Varies forms of fuse-base are available to meet different needs