The DB2-275-30LNE is designed to protect single phase systems for the home / Office / Factory from surges that travel along a Live Input power lines. This is the only device of it's kind that will glow as an indicator that the Surge Protection is still functioning inside DB board. If the DB2-275-30LNE stops glowing, it indicates it needs to be replaced. The DB2-275-30LNE is easily identifiable by its transparent Red housing.
This product must be installed by a qualified electrician.