PV surge protector 3P (T1+T2 DC) BY7-40 1000VDC 87.740

Photovoltaic installation protection – reliable surge arrester BY7-40

This three-pole surge arrester (T1+T2 DC) BY7-40 with a voltage of 1000VDC is a key element protecting photovoltaic installations from the effects of surges. It protects PV modules both from sudden voltage spikes caused by lightning strikes and from switching surges that can occur during system operation. Installation is simple – the arrester is mounted on a standard TH35 rail, taking up 54 mm wide (equivalent to 3 x 18mm modules).

Safety and technical parameters

The BY7-40 arrester has been designed with long-term and reliable protection in mind. It meets the requirements of the CE declaration, confirming its compliance with European safety standards. Its effectiveness is ensured by key parameters: impulse current (Iimp) is 5kA, maximum discharge current (Imax) is 40kA, rated discharge current (In) is 20kA, rated insulation voltage (Uc) is 1000VDC, and protection voltage (Up) is 3.5kV.

Installation and application - for installers and end users

The BY7-40 arrester is used in photovoltaic installations for both domestic and industrial needs. Its mounting on a TH35 rail is quick and intuitive, which translates into time savings during installation. Thanks to its compact size (3 modules) it does not take up much space in the switchgear cabinet. For the end user, this means above all peace of mind – knowing that their installation is protected against potential damage caused by surges, which translates into a longer system life and avoiding costly repairs. Using the BY7-40 arrester is an investment in the safety and reliability of the entire photovoltaic installation.