Varistor surge protector for photovoltaic installations SV B+C 3P SIMTEC 85036002

Photovoltaic installation protection – key to trouble-free operation

The varistor surge protector SV B+C 3P SIMTEC is a reliable device designed to protect photovoltaic installations from the effects of lightning strikes and other overvoltages. Installed on the DC (direct current) side of generators and inverters, it protects sensitive system components, ensuring its long-term and efficient operation. The device is particularly important in areas prone to frequent storms and voltage fluctuations.

Construction and operation

This surge protector utilizes a non-linear element – a varistor – which effectively limits surge voltages and overcurrents. Protection class Type 1+2 (B+C) means that the device provides comprehensive protection, responding to both direct and indirect lightning strikes. The follow current extinguishing capacity at 20 kA guarantees the safety of the installation even in the event of strong discharges. Optical signaling informs about the operation of the device, facilitating diagnostics and quick response in the event of a failure.

Specification and application

The device is designed to operate in installations with a rated DC voltage of up to 1000 V and a maximum photovoltaic installation voltage of 1060 V. Its compact design (3 modules) facilitates mounting on a standard TH-35 rail. The maximum wire cross-section of 35 mm² (single-/multi-stranded) and 25 mm² (flexible) ensures compatibility with most wiring used in photovoltaic installations. The degree of protection IP20 indicates protection against touch, which is important from the point of view of safety. This surge protector is used both in new installations and in the modernization of existing photovoltaic systems, where protection against overvoltages is crucial to ensure the reliability and longevity of the entire installation. The impulse current level of 6.25 kA demonstrates the high effectiveness of the device in absorbing surge energy.