The Surge Arrester monitoring instruments are fully tested for use with any manufacturer’s surge arrester. The SC003 is a Surge Counter & also provides the additional measurement of total leakage current. The analogue instrument provides a means of monitoring the current through the arrester and the leakage current over the surface of the arrester housing. Significant changes after installation may indicate a deterioration in the arrester or a the buildup of surface contamination.

 

These instruments, which require no auxiliary supply, are designed for installation in the earth connections of a single surge arrester, or alternatively, the SC003 may be used with the common earth of a three-phase set. Fully weatherproofed and sealed for the life they are housed in a one-piece gravity die-cast aluminum case coated to enhance their already high degree of resistance to surface corrosion. The glass viewing window is sealed in place, using a silicon rubber adhesive, and a desiccator is enclosed to ensure any residual moisture trapped during sealing is absorbed for the service life of the counter. Mounting is effected by means of an integrally cast lug at the rear of the case providing a single clearance hole for the galvanized steel M12 bolt supplied. The SC003 is service proven and requires no special maintenance or servicing apart from general cleaning of the glass viewing window and the molded epoxy resin line terminal bushing.