RY type, RY I type, RY II type, and RY III type high-voltage fuses (commonly known as high-voltage fuses) are suitable for outdoor high-voltage drop out fuses with a current of 50Hz and a rated voltage of 10-35kV, and are used as fuse elements.  

Product model and meaning

R Y □-□□/□
││││└ - Rated current A
││││└-- Melting rate, represented by T (slow) or K (fast)
│││└-- Rated voltage kV
││└-- Design number, represented by Roman numerals
│└--------- Fuse
└----------- Used for fuses
Product Features
The RY type fuse consists of upper and lower leads, a melt, etc. The melt material is a high melting point alloy. Mainly suitable for the use of fuses with dual end exhaust structures.  
The RYI and RYll fuses consist of upper and lower leads, melt, buttons, and auxiliary arc extinguishing tubes. The molten material is a low melting point alloy. The RYI type buttons are fixed, while the RYll type buttons are detachable, allowing users to easily connect or disconnect the arc shortening rod as needed.
RYlll type fuse consists of upper and lower leads, melt, and buttons. The molten material is a high melting point alloy. Mainly suitable for the use of fuses with single ended exhaust structures.
The time current characteristic curves of RYI and RYll type fuses are shown in Figure 23 and Figure 24.