Small size, excellent quality, light weight, easy to install Surge arresters and surge arresters with monitors in the grid to run in series ... to suppress residual, had no effect on the performance of surge arresters; 4: Stainless steel shell, enhanced anti-corrosion ability.Model ... JS-8S JSY-8S JSYF9 JSYF9-S JSYF9-SD the counter / monitor of the Polymer Surge Arrester