RT20系列刀型触头熔断器主要用于额定电压至（zhì）交流500V，额定电流至1600A的配电系统中作为线路和电缆的（de）过载保护和短（duǎn）路保护。

本系列熔断（duàn）器能与国外符合IEC、DIN标（biāo）准的同类熔断器完全互换。

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

● 特殊设计的变截面尺（chǐ）寸熔体，以及起“M-效应”作用的低熔点合金在位（wèi）置、形状、和定量上的精确配置，降（jiàng）低（dī）了熔断体功率损耗，形（xíng）成理想的多段保护特（tè）性。

● 高强度（dù）致密型（xíng）瓷管具（jù）有极（jí）好的耐冷热剧变和（hé）抗冲击性能。

● 有较高烧结（jié）温度的高纯度石英砂（shā）作灭弧介质。

● 整（zhěng）体冷镦成型触刀，结构强度和导电性能良（liáng）好。

● 多种形式的底座可（kě）供选择使用。

● 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