Kumwell SCB, exclusive SPD external disconnector solves the fire problem caused by SPD degradation and power grid failure. It can avoid SPD external disconnector tripping mistakenly under lightning stroke, thus keeping lightning protection performance. It solves protection blind problem that fuses and MCBs are used as external disconnector. It has become the ideal matching component for SPD.

Characteristics :

• Trip under 3A power frequency current
• No tripping and damage under surge current to guarantee\ continuous lightning protection
• Low residual voltage (Up value of SCB is very low, almost equal to fuse)
• Rated short circuit current up to 100 kA (ICS)