Surge arrester type T1+T2, 3-pole, 1200 V DC, Imax: 65kA, In: 25kA, Iimp: 12.5 kA (10/350) RSP-PV12.5-1200-3P 2617387

Protection of photovoltaic installations – reliable surge arrester

This three-pole surge arrester is specifically designed to protect DC photovoltaic installations. Its construction, based on MOV (varistor) and GDT (gas discharge tube) technology, provides comprehensive protection against the effects of surges, both those caused by lightning strikes and disturbances in the grid. This is a key element ensuring the safety and continuity of the PV system.

The surge arrester combines the features of a Type T1 (protection against direct lightning strikes) and T2 (protection against indirect surges) arrester, making it a versatile solution for various installations. The plug-in design simplifies installation and replacement, and the potential-free contact enables remote damage signaling, which is particularly important in larger photovoltaic systems.

Key features and benefits

• Versatile protection: Class I+II (T1+T2) provides protection against both direct and indirect surges.
• High surge current resistance: Peak current Iimp 12.5 kA (10/350) guarantees effective protection even with strong voltage pulses. A rated discharge current In of 25kA provides a solid margin of safety.
• MOV + GDT technology: The combination of varistors and a gas discharge tube increases the durability and reliability of the device. Varistors absorb surge energy, and the gas discharge tube conducts current to ground, minimizing the risk of damage.
• Status signaling: A potential-free contact enables remote monitoring of the arrester status and a quick response in the event of a failure. This allows for proactive management of the photovoltaic system and minimization of downtime.
• Rated voltage 1200 V DC: Enables use in modern photovoltaic installations with higher operating voltages.
• Easy installation: The plug-in design simplifies the installation and servicing process.

Application and installation

This surge arrester is used in DC photovoltaic installations, both in on-grid (grid-connected) and off-grid (autonomous) systems. Installation should be carried out by a qualified electrician in accordance with applicable standards and regulations. Ensuring proper grounding is crucial for effective protection against surges. Placing the arrester at the boundary of LPZ 0-1 or LPZ 1-2 zone will provide optimal protection of the installation.