Hz series shield is a good electrical insulation sealing waterproof safety protection product. It has the characteristics of convenient installation, excellent environmental adaptability and long service life. It is mainly used for insulation protection at the connection of power transformer terminal and other wiring equipment. Prevent short circuit accidents caused by foreign matters overlapping and animals climbing down, prevent personal electric shock, pollution and condensation flashover, reduce the corrosion of conductive materials by air and harmful gases, and extend the service life of electrical equipment.