Surge and Lightning Protection with Integrated Fuse
Garching, 04.06.2025 – Raycap, an international manufacturer of lightning and surge protection solutions, presents the ProTec T1SF, an innovative surge protection device (SPD) that combines four assemblies in one SPD.
Based on innovative PGDT (Phase Gas Discharge Tube) technology, the ProTec T1SF series offers outstanding protection and safe thermal fault current shutdown in networks with prospective currents from 300 A up to VDE-certified 100 kA. The integrated thermal disconnect switch ensures safe thermal shutdown even at low fault currents <300 A and extends the continuous fault tripping characteristic up to 1 A.
Thanks to the integrated fuse, no additional fuse is required. Integrating the fuse into the protector not only reduces the space requirement in the control cabinet but also lowers installation costs and minimizes cabling effort, thus reducing installation time. The ProTec T1SF fits into any DIN 43880 standard control cabinet, from the largest to the smallest design, and complies with IEC 61643-11: 2011 and EN 61643-11: 2012+A11:2018.
New Configurations Save Effort and Space
The proven ProTec T1SF series has been expanded to include the new ProTec T1SF 3+1. Like the other SPDs in the ProTec T1SF series, it offers leakage current-free lightning and surge protection for the pre-meter area. In a new design, the ProTec T1SF 3+1 combines four times the overcurrent and surge protection into one assembly. Previously, to obtain this configuration, units had to be connected individually in series using an external cross-connector. In addition, the ProTec T1SF assemblies (4+0 TN-S network, 3+1 TN-S and TT network, 3+0 TN-C network) are available with an integrated remote signalization, which is only required on one and does not transmit the signal through the entire assembly via a daisy chain.
The compact design of the VDE-tested ProTec T1SF is a good solution for low space requirements, with low installation costs, less time required for cabling, and less complexity. The shorter connection cables also improve the protection level at the installation points. The ProTec T1SF allows installation in networks with low prospective short-circuit currents.
The ProTec T1SF series is available in various configurations (4+0, 3+1, and 3+0; also available as 1+0) as type 1+2+3 surge protection with and without remote signalization to meet individual requirements. The ProTec T1SF series from Raycap helps to protect systems in the long term and minimize operational downtime.
ProTec T1SF Series
Raycap’s ProTec T1SF Series is based on our Phase Gas Discharge Tube (PGDT) technology and a new integrated overcurrent technology. The products ensure safe thermal and fault-current disconnection on networks with prospective short-circuit currents as low as 300A and as high as 75,000A. On networks with prospective currents, SPDs with integrated fuses provide enhanced safety and fault-current protection due to the coordinated tripping characteristics of the thermal disconnect and integrated fuse.
