Rapid diagnosis by remote monitoring
By coupling with the remote signalling contact, the internal fuse is automatically monitored. This keeps you informed about the state of both arrester and fuse in real time.
According to the installation standard, the maximum cable length is limited to 0.5 metres. Wiring an external back-up fuse already uses up a considerable portion of this length, significantly restricting your installation possibilities. With CI arresters, you stay flexible and can easily meet the requirements of the standard.
More safety due to lower protection level
The protection level specified applies to the surge protective device itself. If an external backup fuse is added, the protection level changes for the worse. DG SE CI (WE) 440 FM, in contrast, has the value of 2 kV as a complete unit which, for you, means that nothing is lost here!