How to secure PV and RES systems
In times of growing interest in renewable energy and the need to manage it efficiently, the protection of such installations from damage is becoming a very important factor. The provision of equipment to support the development of photovoltaic and wind farms, enabling efficient energy management, infrastructure protection and reliability in harsh environmental conditions is the basis of today's installations. It therefore becomes indispensable to use components such as energy meters, high-current industrial relays or surge arresters, which are perfectly suited to commercial and industrial applications, guaranteeing safety, precision and reliability.
RLE Electric energy consumption meters - Reliable Monitoring of Energy Consumption
The RLE 01-2M and RLE 03-4M electricic energy consumption meters are distinguished by their simple design and intuitive operation, while offering high accuracy (Class B). Thanks to their pulse output and RS485/ModBus interface, they are ideal for monitoring and technical energy balancing systems, especially in commercial and industrial environments. Their ability to integrate with SCADA systems allows efficient management of energy consumption and real-time monitoring of technical parameters. What's more, their MID-compliant certification makes them an ideal choice for PV installations, including for monitoring the operation of solar inverters.
Surge protection - DC arresters for PV
Another very important component is the DC surge arresters, which protect installations against lightning and lightning surges, according to IEC 61643-31:2018. They are designed for installation in lightning protection zones LPZ 0-1, where they provide protection against lightning and surges. Surge arresters should be installed at both ends of the DC power line - on the solar panel side and the inverter side. Thanks to the use of high-quality MOV varistors, these devices guarantee effective protection and ensure a long service life of the PV infrastructure.
SP-T...-DC series - Multi-level protection
Surge arresters of the RSP-T...-DC series are available in protection classes I+II and II, allowing them to be installed both in main distribution cabinets and other key points of the DC network. Equipped with thermal disconnectors and fault indicators, they ensure safe and reliable operation even in harsh outdoor conditions.
Why are the RS80 and RS50 high-current relays essential for photovoltaic installations?
Another element that should protect the photovoltaic installation is the RS50 and RS80 high-current relays.
These are components that are ideal for applications with high power requirements. The RS80 relay handles loads up to 90 A and is primarily designed for solar inverters and applications requiring high performance with a minimal footprint - just 4 x 2.5 cm on a PCB. With a contact gap ≥ 4.1 mm and two contacts (2Z), this relay provides high switching power, ideal for demanding PV installations. In contrast, the RS50 relay, with a slightly lower load capacity (up to 50 A), guarantees stable operation in various industrial systems. Normally-closed contacts (1Z, 2Z) and reinforced insulation with a contact gap ≥ 1.85 mm guarantee safe and stable operation under high-current conditions.